qcodes.instrument_drivers.Galil package

Submodules

qcodes.instrument_drivers.Galil.dmc_41x3 module

This file holds the QCoDeS driver for the Galil DMC-41x3 motor controllers.

Colloquially known as the “stepper motors”.

class qcodes.instrument_drivers.Galil.dmc_41x3.Arm(controller: qcodes.instrument_drivers.Galil.dmc_41x3.DMC4133Controller)[source]

Bases: object

Module to control probe arm. It is assumed that the chip to be probed has one or more rows with each row having one or more pads. Design of the chip to be probed should resemble the following:

|--------------------------|
|--------------------------|
|--------------------------|
|--------------------------|
|--------------------------|

Needle head for the arm in assumed to have rows of needles which is a divisor of the number of rows in the chip and number of needles in each row of the needle head is a divisor for the number of pads in each row of the chip.

Initializes the arm class

Parameters

controller – an instance of DMC4133Controller

property current_row: Optional[int]
property current_pad: Optional[int]
property left_bottom_position: Optional[Tuple[int, int, int]]
property left_top_position: Optional[Tuple[int, int, int]]
property right_top_position: Optional[Tuple[int, int, int]]
property arm_pick_up_distance: int
property speed: int
property acceleration: int
property deceleration: int
set_arm_kinematics(speed: int = 100, acceleration: int = 2048, deceleration: int = 2048) None[source]

sets the arm kinematics values for speed, acceleration and deceleration in micro meters/sec and micro meters/sec^2 respectively

set_pick_up_distance(distance: float = 3000) None[source]

sets pick up distance in micrometers for the arm

set_left_bottom_position() None[source]
set_left_top_position() None[source]
set_right_top_position() None[source]
move_motor_a_by(distance: float) None[source]

Moves motor A by distance given in micro meters

move_motor_b_by(distance: float) None[source]

Moves motor B by distance given in micro meters

move_motor_c_by(distance: float) None[source]

Moves motor B by distance given in micro meters

move_towards_left_bottom_position() None[source]
move_to_next_row() None[source]
move_to_begin_row_pad_from_end_row_last_pad() None[source]
move_to_row(num: int) None[source]
move_to_pad(num: int) None[source]
set_motor_a_forward_limit() None[source]
set_motor_a_reverse_limit() None[source]
set_motor_b_forward_limit() None[source]
set_motor_b_reverse_limit() None[source]
set_motor_c_forward_limit() None[source]
set_motor_c_reverse_limit() None[source]
class qcodes.instrument_drivers.Galil.dmc_41x3.DMC4133Controller(name: str, address: str, **kwargs: Any)[source]

Bases: qcodes.instrument_drivers.Galil.dmc_41x3.GalilMotionController

Driver for Galil DMC-4133 Controller

Initializes the DMC4133Controller class

Parameters
  • name – name for the instance

  • address – address of the controller burned in

end_program() None[source]

ends the program

define_position_as_origin() None[source]

defines current motors position as origin

tell_error() str[source]

reads error

stop() None[source]

stop the motion of all motors

abort() None[source]

aborts motion and the program operation

motors_off() None[source]

turn all motors off

begin_motors() None[source]

begin motion of all motors simultaneously

wait_till_motion_complete() None[source]

this method waits for the motion on all motors to complete

__del__() None

Close the instrument and remove its instance record.

__getitem__(key: str) Union[Callable[[...], Any], qcodes.instrument.parameter.Parameter]

Delegate instrument[‘name’] to parameter or function ‘name’.

__getstate__() None

Prevent pickling instruments, and give a nice error message.

__repr__() str

Simplified repr giving just the class and name.

add_function(name: str, **kwargs: Any) None

Bind one Function to this instrument.

Instrument subclasses can call this repeatedly in their __init__ for every real function of the instrument.

This functionality is meant for simple cases, principally things that map to simple commands like *RST (reset) or those with just a few arguments. It requires a fixed argument count, and positional args only. If your case is more complicated, you’re probably better off simply making a new method in your Instrument subclass definition.

Parameters
  • name – How the Function will be stored within instrument.Functions and also how you address it using the shortcut methods: instrument.call(func_name, *args) etc.

  • **kwargs – constructor kwargs for Function

Raises

KeyError – If this instrument already has a function with this name.

add_parameter(name: str, parameter_class: type = <class 'qcodes.instrument.parameter.Parameter'>, **kwargs: Any) None

Bind one Parameter to this instrument.

Instrument subclasses can call this repeatedly in their __init__ for every real parameter of the instrument.

In this sense, parameters are the state variables of the instrument, anything the user can set and/or get.

Parameters
  • name – How the parameter will be stored within instrument.parameters and also how you address it using the shortcut methods: instrument.set(param_name, value) etc.

  • parameter_class – You can construct the parameter out of any class. Default parameter.Parameter.

  • **kwargs – Constructor arguments for parameter_class.

Raises
  • KeyError – If this instrument already has a parameter with this name and the parameter being replaced is not an abstract parameter.

  • ValueError – If there is an existing abstract parameter and the unit of the new parameter is inconsistent with the existing one.

add_submodule(name: str, submodule: Union[InstrumentBase, ChannelList]) None

Bind one submodule to this instrument.

Instrument subclasses can call this repeatedly in their __init__ method for every submodule of the instrument.

Submodules can effectively be considered as instruments within the main instrument, and should at minimum be snapshottable. For example, they can be used to either store logical groupings of parameters, which may or may not be repeated, or channel lists.

Parameters
  • name – How the submodule will be stored within instrument.submodules and also how it can be addressed.

  • submodule – The submodule to be stored.

Raises
  • KeyError – If this instrument already contains a submodule with this name.

  • TypeError – If the submodule that we are trying to add is not an instance of an Metadatable object.

property ancestors: List[qcodes.instrument.base.InstrumentBase]

Returns a list of instruments, starting from the current instrument and following to the parent instrument and the parents parent instrument until the root instrument is reached.

ask(cmd: str) str

Write a command string to the hardware and return a response.

Subclasses that transform cmd should override this method, and in it call super().ask(new_cmd). Subclasses that define a new hardware communication should instead override ask_raw.

Parameters

cmd – The string to send to the instrument.

Returns

response

Raises

Exception – Wraps any underlying exception with extra context, including the command and the instrument.

ask_raw(cmd: str) str

Asks/Reads data from Galil motion controller

call(func_name: str, *args: Any) Any

Shortcut for calling a function from its name.

Parameters
  • func_name – The name of a function of this instrument.

  • *args – any arguments to the function.

Returns

The return value of the function.

close() None

Close connection to the instrument

classmethod close_all() None

Try to close all instruments registered in _all_instruments This is handy for use with atexit to ensure that all instruments are closed when a python session is closed.

Examples

>>> atexit.register(qc.Instrument.close_all())
connect_message(idn_param: str = 'IDN', begin_time: Optional[float] = None) None

Print a standard message on initial connection to an instrument.

Parameters
  • idn_param – Name of parameter that returns ID dict. Default IDN.

  • begin_timetime.time() when init started. Default is self._t0, set at start of Instrument.__init__.

delegate_attr_dicts: List[str] = ['parameters', 'functions', 'submodules']

A list of names (strings) of dictionaries which are (or will be) attributes of self, whose keys should be treated as attributes of self.

delegate_attr_objects: List[str] = []

A list of names (strings) of objects which are (or will be) attributes of self, whose attributes should be passed through to self.

static exist(name: str, instrument_class: Optional[type] = None) bool

Check if an instrument with a given names exists (i.e. is already instantiated).

Parameters
  • name – Name of the instrument.

  • instrument_class – The type of instrument you are looking for.

classmethod find_instrument(name: str, instrument_class: Optional[type] = None) qcodes.instrument.base.Instrument

Find an existing instrument by name.

Parameters
  • name – Name of the instrument.

  • instrument_class – The type of instrument you are looking for.

Returns

The instrument found.

Raises
  • KeyError – If no instrument of that name was found, or if its reference is invalid (dead).

  • TypeError – If a specific class was requested but a different type was found.

property full_name: str
get(param_name: str) Any

Shortcut for getting a parameter from its name.

Parameters

param_name – The name of a parameter of this instrument.

Returns

The current value of the parameter.

get_idn() Dict[str, Optional[str]]

Get Galil motion controller hardware information

classmethod instances() List[qcodes.instrument.base.Instrument]

Get all currently defined instances of this instrument class.

You can use this to get the objects back if you lose track of them, and it’s also used by the test system to find objects to test against.

Returns

A list of instances.

static is_valid(instr_instance: qcodes.instrument.base.Instrument) bool

Check if a given instance of an instrument is valid: if an instrument has been closed, its instance is not longer a “valid” instrument.

Parameters

instr_instance – Instance of an Instrument class or its subclass.

load_metadata(metadata: Dict[Any, Any]) None

Load metadata into this classes metadata dictionary.

Parameters

metadata – Metadata to load.

motion_complete(axes: str) None

Wait for motion to complete for given axes, e.g. "A" for axis A, "ABC" for axes A, B, and C

property name: str

Name of the instrument

property name_parts: List[str]
omit_delegate_attrs: List[str] = []

A list of attribute names (strings) to not delegate to any other dictionary or object.

open() None

Open connection to Galil motion controller. This method assumes that the initial mapping of Galil motion controller’s hardware’s to an IP address is done using GDK and the IP address is burned in. This applies that Motion controller no more requests for an IP address and a connection to the Motion controller can be done by the IP address burned in.

property parent: Optional[qcodes.instrument.base.InstrumentBase]

Returns the parent instrument. By default this is None. Any SubInstrument should subclass this to return the parent instrument.

print_readable_snapshot(update: bool = False, max_chars: int = 80) None

Prints a readable version of the snapshot. The readable snapshot includes the name, value and unit of each parameter. A convenience function to quickly get an overview of the status of an instrument.

Parameters
  • update – If True, update the state by querying the instrument. If False, just use the latest values in memory. This argument gets passed to the snapshot function.

  • max_chars – the maximum number of characters per line. The readable snapshot will be cropped if this value is exceeded. Defaults to 80 to be consistent with default terminal width.

classmethod record_instance(instance: qcodes.instrument.base.Instrument) None

Record (a weak ref to) an instance in a class’s instance list.

Also records the instance in list of all instruments, and verifies that there are no other instruments with the same name.

Parameters

instance – Instance to record.

Raises

KeyError – If another instance with the same name is already present.

classmethod remove_instance(instance: qcodes.instrument.base.Instrument) None

Remove a particular instance from the record.

Parameters

instance – The instance to remove

property root_instrument: qcodes.instrument.base.InstrumentBase
set(param_name: str, value: Any) None

Shortcut for setting a parameter from its name and new value.

Parameters
  • param_name – The name of a parameter of this instrument.

  • value – The new value to set.

shared_kwargs = ()
property short_name: str

Short name of the instrument

snapshot(update: Optional[bool] = False) Dict[Any, Any]

Decorate a snapshot dictionary with metadata. DO NOT override this method if you want metadata in the snapshot instead, override snapshot_base().

Parameters

update – Passed to snapshot_base.

Returns

Base snapshot.

snapshot_base(update: Optional[bool] = False, params_to_skip_update: Optional[Sequence[str]] = None) Dict[Any, Any]

State of the instrument as a JSON-compatible dict (everything that the custom JSON encoder class qcodes.utils.helpers.NumpyJSONEncoder supports).

Parameters
  • update – If True, update the state by querying the instrument. If None update the state if known to be invalid. If False, just use the latest values in memory and never update state.

  • params_to_skip_update – List of parameter names that will be skipped in update even if update is True. This is useful if you have parameters that are slow to update but can be updated in a different way (as in the qdac). If you want to skip the update of certain parameters in all snapshots, use the snapshot_get attribute of those parameters instead.

Returns

base snapshot

Return type

dict

timeout(val: int) None

Sets timeout for the instrument

Parameters

val – time in milliseconds. -1 disables the timeout

validate_status(verbose: bool = False) None

Validate the values of all gettable parameters

The validation is done for all parameters that have both a get and set method.

Parameters

verbose – If True, then information about the parameters that are being check is printed.

write(cmd: str) None

Write a command string with NO response to the hardware.

Subclasses that transform cmd should override this method, and in it call super().write(new_cmd). Subclasses that define a new hardware communication should instead override write_raw.

Parameters

cmd – The string to send to the instrument.

Raises

Exception – Wraps any underlying exception with extra context, including the command and the instrument.

write_raw(cmd: str) None

Write for Galil motion controller

parameters: Dict[str, _BaseParameter] = {}

All the parameters supported by this instrument. Usually populated via add_parameter().

functions: Dict[str, Function] = {}

All the functions supported by this instrument. Usually populated via add_function().

submodules: Dict[str, Union['InstrumentBase', 'ChannelList']] = {}

All the submodules of this instrument such as channel lists or logical groupings of parameters. Usually populated via add_submodule().

log: InstrumentLoggerAdapter = get_instrument_logger(self, __name__)
class qcodes.instrument_drivers.Galil.dmc_41x3.GalilMotionController(name: str, address: str, **kwargs: Any)[source]

Bases: qcodes.instrument.base.Instrument

Base class for Galil Motion Controller drivers

Initializes and opens the connection to the Galil Motion Controller

Parameters
  • name – name for the instrument

  • address – address of the controller

open() None[source]

Open connection to Galil motion controller. This method assumes that the initial mapping of Galil motion controller’s hardware’s to an IP address is done using GDK and the IP address is burned in. This applies that Motion controller no more requests for an IP address and a connection to the Motion controller can be done by the IP address burned in.

get_idn() Dict[str, Optional[str]][source]

Get Galil motion controller hardware information

write_raw(cmd: str) None[source]

Write for Galil motion controller

ask_raw(cmd: str) str[source]

Asks/Reads data from Galil motion controller

timeout(val: int) None[source]

Sets timeout for the instrument

Parameters

val – time in milliseconds. -1 disables the timeout

close() None[source]

Close connection to the instrument

motion_complete(axes: str) None[source]

Wait for motion to complete for given axes, e.g. "A" for axis A, "ABC" for axes A, B, and C

__del__() None

Close the instrument and remove its instance record.

__getitem__(key: str) Union[Callable[[...], Any], qcodes.instrument.parameter.Parameter]

Delegate instrument[‘name’] to parameter or function ‘name’.

__getstate__() None

Prevent pickling instruments, and give a nice error message.

__repr__() str

Simplified repr giving just the class and name.

add_function(name: str, **kwargs: Any) None

Bind one Function to this instrument.

Instrument subclasses can call this repeatedly in their __init__ for every real function of the instrument.

This functionality is meant for simple cases, principally things that map to simple commands like *RST (reset) or those with just a few arguments. It requires a fixed argument count, and positional args only. If your case is more complicated, you’re probably better off simply making a new method in your Instrument subclass definition.

Parameters
  • name – How the Function will be stored within instrument.Functions and also how you address it using the shortcut methods: instrument.call(func_name, *args) etc.

  • **kwargs – constructor kwargs for Function

Raises

KeyError – If this instrument already has a function with this name.

add_parameter(name: str, parameter_class: type = <class 'qcodes.instrument.parameter.Parameter'>, **kwargs: Any) None

Bind one Parameter to this instrument.

Instrument subclasses can call this repeatedly in their __init__ for every real parameter of the instrument.

In this sense, parameters are the state variables of the instrument, anything the user can set and/or get.

Parameters
  • name – How the parameter will be stored within instrument.parameters and also how you address it using the shortcut methods: instrument.set(param_name, value) etc.

  • parameter_class – You can construct the parameter out of any class. Default parameter.Parameter.

  • **kwargs – Constructor arguments for parameter_class.

Raises
  • KeyError – If this instrument already has a parameter with this name and the parameter being replaced is not an abstract parameter.

  • ValueError – If there is an existing abstract parameter and the unit of the new parameter is inconsistent with the existing one.

add_submodule(name: str, submodule: Union[InstrumentBase, ChannelList]) None

Bind one submodule to this instrument.

Instrument subclasses can call this repeatedly in their __init__ method for every submodule of the instrument.

Submodules can effectively be considered as instruments within the main instrument, and should at minimum be snapshottable. For example, they can be used to either store logical groupings of parameters, which may or may not be repeated, or channel lists.

Parameters
  • name – How the submodule will be stored within instrument.submodules and also how it can be addressed.

  • submodule – The submodule to be stored.

Raises
  • KeyError – If this instrument already contains a submodule with this name.

  • TypeError – If the submodule that we are trying to add is not an instance of an Metadatable object.

property ancestors: List[qcodes.instrument.base.InstrumentBase]

Returns a list of instruments, starting from the current instrument and following to the parent instrument and the parents parent instrument until the root instrument is reached.

ask(cmd: str) str

Write a command string to the hardware and return a response.

Subclasses that transform cmd should override this method, and in it call super().ask(new_cmd). Subclasses that define a new hardware communication should instead override ask_raw.

Parameters

cmd – The string to send to the instrument.

Returns

response

Raises

Exception – Wraps any underlying exception with extra context, including the command and the instrument.

call(func_name: str, *args: Any) Any

Shortcut for calling a function from its name.

Parameters
  • func_name – The name of a function of this instrument.

  • *args – any arguments to the function.

Returns

The return value of the function.

classmethod close_all() None

Try to close all instruments registered in _all_instruments This is handy for use with atexit to ensure that all instruments are closed when a python session is closed.

Examples

>>> atexit.register(qc.Instrument.close_all())
connect_message(idn_param: str = 'IDN', begin_time: Optional[float] = None) None

Print a standard message on initial connection to an instrument.

Parameters
  • idn_param – Name of parameter that returns ID dict. Default IDN.

  • begin_timetime.time() when init started. Default is self._t0, set at start of Instrument.__init__.

delegate_attr_dicts: List[str] = ['parameters', 'functions', 'submodules']

A list of names (strings) of dictionaries which are (or will be) attributes of self, whose keys should be treated as attributes of self.

delegate_attr_objects: List[str] = []

A list of names (strings) of objects which are (or will be) attributes of self, whose attributes should be passed through to self.

static exist(name: str, instrument_class: Optional[type] = None) bool

Check if an instrument with a given names exists (i.e. is already instantiated).

Parameters
  • name – Name of the instrument.

  • instrument_class – The type of instrument you are looking for.

classmethod find_instrument(name: str, instrument_class: Optional[type] = None) qcodes.instrument.base.Instrument

Find an existing instrument by name.

Parameters
  • name – Name of the instrument.

  • instrument_class – The type of instrument you are looking for.

Returns

The instrument found.

Raises
  • KeyError – If no instrument of that name was found, or if its reference is invalid (dead).

  • TypeError – If a specific class was requested but a different type was found.

property full_name: str
get(param_name: str) Any

Shortcut for getting a parameter from its name.

Parameters

param_name – The name of a parameter of this instrument.

Returns

The current value of the parameter.

classmethod instances() List[qcodes.instrument.base.Instrument]

Get all currently defined instances of this instrument class.

You can use this to get the objects back if you lose track of them, and it’s also used by the test system to find objects to test against.

Returns

A list of instances.

static is_valid(instr_instance: qcodes.instrument.base.Instrument) bool

Check if a given instance of an instrument is valid: if an instrument has been closed, its instance is not longer a “valid” instrument.

Parameters

instr_instance – Instance of an Instrument class or its subclass.

load_metadata(metadata: Dict[Any, Any]) None

Load metadata into this classes metadata dictionary.

Parameters

metadata – Metadata to load.

property name: str

Name of the instrument

property name_parts: List[str]
omit_delegate_attrs: List[str] = []

A list of attribute names (strings) to not delegate to any other dictionary or object.

property parent: Optional[qcodes.instrument.base.InstrumentBase]

Returns the parent instrument. By default this is None. Any SubInstrument should subclass this to return the parent instrument.

print_readable_snapshot(update: bool = False, max_chars: int = 80) None

Prints a readable version of the snapshot. The readable snapshot includes the name, value and unit of each parameter. A convenience function to quickly get an overview of the status of an instrument.

Parameters
  • update – If True, update the state by querying the instrument. If False, just use the latest values in memory. This argument gets passed to the snapshot function.

  • max_chars – the maximum number of characters per line. The readable snapshot will be cropped if this value is exceeded. Defaults to 80 to be consistent with default terminal width.

classmethod record_instance(instance: qcodes.instrument.base.Instrument) None

Record (a weak ref to) an instance in a class’s instance list.

Also records the instance in list of all instruments, and verifies that there are no other instruments with the same name.

Parameters

instance – Instance to record.

Raises

KeyError – If another instance with the same name is already present.

classmethod remove_instance(instance: qcodes.instrument.base.Instrument) None

Remove a particular instance from the record.

Parameters

instance – The instance to remove

property root_instrument: qcodes.instrument.base.InstrumentBase
set(param_name: str, value: Any) None

Shortcut for setting a parameter from its name and new value.

Parameters
  • param_name – The name of a parameter of this instrument.

  • value – The new value to set.

shared_kwargs = ()
property short_name: str

Short name of the instrument

snapshot(update: Optional[bool] = False) Dict[Any, Any]

Decorate a snapshot dictionary with metadata. DO NOT override this method if you want metadata in the snapshot instead, override snapshot_base().

Parameters

update – Passed to snapshot_base.

Returns

Base snapshot.

snapshot_base(update: Optional[bool] = False, params_to_skip_update: Optional[Sequence[str]] = None) Dict[Any, Any]

State of the instrument as a JSON-compatible dict (everything that the custom JSON encoder class qcodes.utils.helpers.NumpyJSONEncoder supports).

Parameters
  • update – If True, update the state by querying the instrument. If None update the state if known to be invalid. If False, just use the latest values in memory and never update state.

  • params_to_skip_update – List of parameter names that will be skipped in update even if update is True. This is useful if you have parameters that are slow to update but can be updated in a different way (as in the qdac). If you want to skip the update of certain parameters in all snapshots, use the snapshot_get attribute of those parameters instead.

Returns

base snapshot

Return type

dict

validate_status(verbose: bool = False) None

Validate the values of all gettable parameters

The validation is done for all parameters that have both a get and set method.

Parameters

verbose – If True, then information about the parameters that are being check is printed.

write(cmd: str) None

Write a command string with NO response to the hardware.

Subclasses that transform cmd should override this method, and in it call super().write(new_cmd). Subclasses that define a new hardware communication should instead override write_raw.

Parameters

cmd – The string to send to the instrument.

Raises

Exception – Wraps any underlying exception with extra context, including the command and the instrument.

parameters: Dict[str, _BaseParameter] = {}

All the parameters supported by this instrument. Usually populated via add_parameter().

functions: Dict[str, Function] = {}

All the functions supported by this instrument. Usually populated via add_function().

submodules: Dict[str, Union['InstrumentBase', 'ChannelList']] = {}

All the submodules of this instrument such as channel lists or logical groupings of parameters. Usually populated via add_submodule().

log: InstrumentLoggerAdapter = get_instrument_logger(self, __name__)
class qcodes.instrument_drivers.Galil.dmc_41x3.Motor(parent: qcodes.instrument_drivers.Galil.dmc_41x3.DMC4133Controller, name: str, **kwargs: Any)[source]

Bases: qcodes.instrument.channel.InstrumentChannel

Class to control a single motor (independent of possible other motors)

Initializes individual motor submodules

Parameters
  • parent – an instance of DMC4133Controller

  • name – name of the motor to be controlled

off() None[source]

turns motor off

on_off_status() str[source]

tells motor on off status

servo_here() None[source]

servo at the motor

begin() None[source]

begins motion of the motor (returns immediately)

is_in_motion() int[source]

checks if the motor is in motion or not. return 1, if motor is in motion otherwise 0

wait_till_motor_motion_complete() None[source]

wait for motion on the motor to complete

error_magnitude() float[source]

gives the magnitude of error, in quadrature counts, for this motor a count is directly proportional to the micro-stepping resolution of the stepper drive.

__getitem__(key: str) Union[Callable[[...], Any], qcodes.instrument.parameter.Parameter]

Delegate instrument[‘name’] to parameter or function ‘name’.

__getstate__() None

Prevent pickling instruments, and give a nice error message.

__repr__() str

Custom repr to give parent information

add_function(name: str, **kwargs: Any) None

Bind one Function to this instrument.

Instrument subclasses can call this repeatedly in their __init__ for every real function of the instrument.

This functionality is meant for simple cases, principally things that map to simple commands like *RST (reset) or those with just a few arguments. It requires a fixed argument count, and positional args only. If your case is more complicated, you’re probably better off simply making a new method in your Instrument subclass definition.

Parameters
  • name – How the Function will be stored within instrument.Functions and also how you address it using the shortcut methods: instrument.call(func_name, *args) etc.

  • **kwargs – constructor kwargs for Function

Raises

KeyError – If this instrument already has a function with this name.

add_parameter(name: str, parameter_class: type = <class 'qcodes.instrument.parameter.Parameter'>, **kwargs: Any) None

Bind one Parameter to this instrument.

Instrument subclasses can call this repeatedly in their __init__ for every real parameter of the instrument.

In this sense, parameters are the state variables of the instrument, anything the user can set and/or get.

Parameters
  • name – How the parameter will be stored within instrument.parameters and also how you address it using the shortcut methods: instrument.set(param_name, value) etc.

  • parameter_class – You can construct the parameter out of any class. Default parameter.Parameter.

  • **kwargs – Constructor arguments for parameter_class.

Raises
  • KeyError – If this instrument already has a parameter with this name and the parameter being replaced is not an abstract parameter.

  • ValueError – If there is an existing abstract parameter and the unit of the new parameter is inconsistent with the existing one.

add_submodule(name: str, submodule: Union[InstrumentBase, ChannelList]) None

Bind one submodule to this instrument.

Instrument subclasses can call this repeatedly in their __init__ method for every submodule of the instrument.

Submodules can effectively be considered as instruments within the main instrument, and should at minimum be snapshottable. For example, they can be used to either store logical groupings of parameters, which may or may not be repeated, or channel lists.

Parameters
  • name – How the submodule will be stored within instrument.submodules and also how it can be addressed.

  • submodule – The submodule to be stored.

Raises
  • KeyError – If this instrument already contains a submodule with this name.

  • TypeError – If the submodule that we are trying to add is not an instance of an Metadatable object.

property ancestors: List[qcodes.instrument.base.InstrumentBase]

Returns a list of instruments, starting from the current instrument and following to the parent instrument and the parents parent instrument until the root instrument is reached.

ask(cmd: str) str
ask_raw(cmd: str) str
call(func_name: str, *args: Any) Any

Shortcut for calling a function from its name.

Parameters
  • func_name – The name of a function of this instrument.

  • *args – any arguments to the function.

Returns

The return value of the function.

delegate_attr_dicts: List[str] = ['parameters', 'functions', 'submodules']

A list of names (strings) of dictionaries which are (or will be) attributes of self, whose keys should be treated as attributes of self.

delegate_attr_objects: List[str] = []

A list of names (strings) of objects which are (or will be) attributes of self, whose attributes should be passed through to self.

property full_name: str
get(param_name: str) Any

Shortcut for getting a parameter from its name.

Parameters

param_name – The name of a parameter of this instrument.

Returns

The current value of the parameter.

load_metadata(metadata: Dict[Any, Any]) None

Load metadata into this classes metadata dictionary.

Parameters

metadata – Metadata to load.

property name: str

Name of the instrument

property name_parts: List[str]
omit_delegate_attrs: List[str] = []

A list of attribute names (strings) to not delegate to any other dictionary or object.

property parent: qcodes.instrument.base.InstrumentBase

Returns the parent instrument. By default this is None. Any SubInstrument should subclass this to return the parent instrument.

print_readable_snapshot(update: bool = False, max_chars: int = 80) None

Prints a readable version of the snapshot. The readable snapshot includes the name, value and unit of each parameter. A convenience function to quickly get an overview of the status of an instrument.

Parameters
  • update – If True, update the state by querying the instrument. If False, just use the latest values in memory. This argument gets passed to the snapshot function.

  • max_chars – the maximum number of characters per line. The readable snapshot will be cropped if this value is exceeded. Defaults to 80 to be consistent with default terminal width.

property root_instrument: qcodes.instrument.base.InstrumentBase
set(param_name: str, value: Any) None

Shortcut for setting a parameter from its name and new value.

Parameters
  • param_name – The name of a parameter of this instrument.

  • value – The new value to set.

property short_name: str

Short name of the instrument

snapshot(update: Optional[bool] = False) Dict[Any, Any]

Decorate a snapshot dictionary with metadata. DO NOT override this method if you want metadata in the snapshot instead, override snapshot_base().

Parameters

update – Passed to snapshot_base.

Returns

Base snapshot.

snapshot_base(update: Optional[bool] = False, params_to_skip_update: Optional[Sequence[str]] = None) Dict[Any, Any]

State of the instrument as a JSON-compatible dict (everything that the custom JSON encoder class qcodes.utils.helpers.NumpyJSONEncoder supports).

Parameters
  • update – If True, update the state by querying the instrument. If None update the state if known to be invalid. If False, just use the latest values in memory and never update state.

  • params_to_skip_update – List of parameter names that will be skipped in update even if update is True. This is useful if you have parameters that are slow to update but can be updated in a different way (as in the qdac). If you want to skip the update of certain parameters in all snapshots, use the snapshot_get attribute of those parameters instead.

Returns

base snapshot

Return type

dict

validate_status(verbose: bool = False) None

Validate the values of all gettable parameters

The validation is done for all parameters that have both a get and set method.

Parameters

verbose – If True, then information about the parameters that are being check is printed.

write(cmd: str) None
write_raw(cmd: str) None
parameters: Dict[str, _BaseParameter] = {}

All the parameters supported by this instrument. Usually populated via add_parameter().

functions: Dict[str, Function] = {}

All the functions supported by this instrument. Usually populated via add_function().

submodules: Dict[str, Union['InstrumentBase', 'ChannelList']] = {}

All the submodules of this instrument such as channel lists or logical groupings of parameters. Usually populated via add_submodule().

class qcodes.instrument_drivers.Galil.dmc_41x3.VectorMode(parent: qcodes.instrument_drivers.Galil.dmc_41x3.DMC4133Controller, name: str, **kwargs: Any)[source]

Bases: qcodes.instrument.channel.InstrumentChannel

Class to control motors in vector mode

Initializes the vector mode submodule for the controller

Parameters
  • parent – an instance of DMC4133Controller

  • name – name of the vector mode plane

activate() None[source]

activate plane of motion

vector_position(first_coord: int, second_coord: int) None[source]

sets the final vector position for the motion considering current position as the origin

vector_seq_end() None[source]

indicates to the controller that the end of the vector is coming up. is required to exit the vector mode gracefully

begin_seq() None[source]

begins motion of the motor

after_seq_motion() None[source]

wait till motion ends

clear_sequence(coord_sys: str) None[source]

clears vectors specified in the given coordinate system

__getitem__(key: str) Union[Callable[[...], Any], qcodes.instrument.parameter.Parameter]

Delegate instrument[‘name’] to parameter or function ‘name’.

__getstate__() None

Prevent pickling instruments, and give a nice error message.

__repr__() str

Custom repr to give parent information

add_function(name: str, **kwargs: Any) None

Bind one Function to this instrument.

Instrument subclasses can call this repeatedly in their __init__ for every real function of the instrument.

This functionality is meant for simple cases, principally things that map to simple commands like *RST (reset) or those with just a few arguments. It requires a fixed argument count, and positional args only. If your case is more complicated, you’re probably better off simply making a new method in your Instrument subclass definition.

Parameters
  • name – How the Function will be stored within instrument.Functions and also how you address it using the shortcut methods: instrument.call(func_name, *args) etc.

  • **kwargs – constructor kwargs for Function

Raises

KeyError – If this instrument already has a function with this name.

add_parameter(name: str, parameter_class: type = <class 'qcodes.instrument.parameter.Parameter'>, **kwargs: Any) None

Bind one Parameter to this instrument.

Instrument subclasses can call this repeatedly in their __init__ for every real parameter of the instrument.

In this sense, parameters are the state variables of the instrument, anything the user can set and/or get.

Parameters
  • name – How the parameter will be stored within instrument.parameters and also how you address it using the shortcut methods: instrument.set(param_name, value) etc.

  • parameter_class – You can construct the parameter out of any class. Default parameter.Parameter.

  • **kwargs – Constructor arguments for parameter_class.

Raises
  • KeyError – If this instrument already has a parameter with this name and the parameter being replaced is not an abstract parameter.

  • ValueError – If there is an existing abstract parameter and the unit of the new parameter is inconsistent with the existing one.

add_submodule(name: str, submodule: Union[InstrumentBase, ChannelList]) None

Bind one submodule to this instrument.

Instrument subclasses can call this repeatedly in their __init__ method for every submodule of the instrument.

Submodules can effectively be considered as instruments within the main instrument, and should at minimum be snapshottable. For example, they can be used to either store logical groupings of parameters, which may or may not be repeated, or channel lists.

Parameters
  • name – How the submodule will be stored within instrument.submodules and also how it can be addressed.

  • submodule – The submodule to be stored.

Raises
  • KeyError – If this instrument already contains a submodule with this name.

  • TypeError – If the submodule that we are trying to add is not an instance of an Metadatable object.

property ancestors: List[qcodes.instrument.base.InstrumentBase]

Returns a list of instruments, starting from the current instrument and following to the parent instrument and the parents parent instrument until the root instrument is reached.

ask(cmd: str) str
ask_raw(cmd: str) str
call(func_name: str, *args: Any) Any

Shortcut for calling a function from its name.

Parameters
  • func_name – The name of a function of this instrument.

  • *args – any arguments to the function.

Returns

The return value of the function.

delegate_attr_dicts: List[str] = ['parameters', 'functions', 'submodules']

A list of names (strings) of dictionaries which are (or will be) attributes of self, whose keys should be treated as attributes of self.

delegate_attr_objects: List[str] = []

A list of names (strings) of objects which are (or will be) attributes of self, whose attributes should be passed through to self.

property full_name: str
get(param_name: str) Any

Shortcut for getting a parameter from its name.

Parameters

param_name – The name of a parameter of this instrument.

Returns

The current value of the parameter.

load_metadata(metadata: Dict[Any, Any]) None

Load metadata into this classes metadata dictionary.

Parameters

metadata – Metadata to load.

property name: str

Name of the instrument

property name_parts: List[str]
omit_delegate_attrs: List[str] = []

A list of attribute names (strings) to not delegate to any other dictionary or object.

property parent: qcodes.instrument.base.InstrumentBase

Returns the parent instrument. By default this is None. Any SubInstrument should subclass this to return the parent instrument.

print_readable_snapshot(update: bool = False, max_chars: int = 80) None

Prints a readable version of the snapshot. The readable snapshot includes the name, value and unit of each parameter. A convenience function to quickly get an overview of the status of an instrument.

Parameters
  • update – If True, update the state by querying the instrument. If False, just use the latest values in memory. This argument gets passed to the snapshot function.

  • max_chars – the maximum number of characters per line. The readable snapshot will be cropped if this value is exceeded. Defaults to 80 to be consistent with default terminal width.

property root_instrument: qcodes.instrument.base.InstrumentBase
set(param_name: str, value: Any) None

Shortcut for setting a parameter from its name and new value.

Parameters
  • param_name – The name of a parameter of this instrument.

  • value – The new value to set.

property short_name: str

Short name of the instrument

snapshot(update: Optional[bool] = False) Dict[Any, Any]

Decorate a snapshot dictionary with metadata. DO NOT override this method if you want metadata in the snapshot instead, override snapshot_base().

Parameters

update – Passed to snapshot_base.

Returns

Base snapshot.

snapshot_base(update: Optional[bool] = False, params_to_skip_update: Optional[Sequence[str]] = None) Dict[Any, Any]

State of the instrument as a JSON-compatible dict (everything that the custom JSON encoder class qcodes.utils.helpers.NumpyJSONEncoder supports).

Parameters
  • update – If True, update the state by querying the instrument. If None update the state if known to be invalid. If False, just use the latest values in memory and never update state.

  • params_to_skip_update – List of parameter names that will be skipped in update even if update is True. This is useful if you have parameters that are slow to update but can be updated in a different way (as in the qdac). If you want to skip the update of certain parameters in all snapshots, use the snapshot_get attribute of those parameters instead.

Returns

base snapshot

Return type

dict

validate_status(verbose: bool = False) None

Validate the values of all gettable parameters

The validation is done for all parameters that have both a get and set method.

Parameters

verbose – If True, then information about the parameters that are being check is printed.

write(cmd: str) None
write_raw(cmd: str) None
parameters: Dict[str, _BaseParameter] = {}

All the parameters supported by this instrument. Usually populated via add_parameter().

functions: Dict[str, Function] = {}

All the functions supported by this instrument. Usually populated via add_function().

submodules: Dict[str, Union['InstrumentBase', 'ChannelList']] = {}

All the submodules of this instrument such as channel lists or logical groupings of parameters. Usually populated via add_submodule().

Module contents