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Project description

Overall Status

master branch status Build Status - master branch Documentation Status - master branch MIT License Test Coverage - master branch
GitHub status Open Issues + Pull Requests Open Pull Requests
Info Python bindings for NI Modular Instrument drivers. See GitHub for the latest source.
Author National Instruments
NI Digital Multimeter with Python logo


The nimi-python repository generates Python bindings (Application Programming Interface) for interacting with the Modular Instrument drivers. Currently, the following drivers are supported:

  • NI-DCPower (Python module: nidcpower)
  • NI-DMM (Python module: nidmm)
  • NI-FGEN (Python module: nifgen)
  • NI-SCOPE (Python module: niscope)
  • NI-SWITCH (Python module: niswitch)
  • NI-ModInst (Python module: nimodinst)
  • NI Switch Executive (Python module: nise)

It is implemented as a set of Mako templates and per-driver metafiles that produce a Python module for each driver. The driver is called through its public C API using the ctypes Python library.

nimi-python supports all the Operating Systems supported by the underlying driver.

nimi-python supports Python 2.7, 3.4 and later using CPython or PyPy.

NI-SWITCH Python API Status

NI-SWITCH (niswitch)  
Driver Version Tested Against 18.0.0
Driver API Version 19.1.0d0
PyPI Version Latest NI-SWITCH Version
Supported Python Version NI-SWITCH supported Python versions
Open Issues Open Issues + Pull Requests for NI-SWITCH
Open Pull Requests Pull Requests for NI-SWITCH


As a prerequisite to using the niswitch module, you must install the NI-SWITCH runtime on your system. Visit to download the driver runtime for your devices.

The nimi-python modules (i.e. for NI-SWITCH) can be installed with pip:

$ python -m pip install niswitch~=1.1.2

Or easy_install from setuptools:

$ python -m easy_install niswitch


We welcome contributions! You can clone the project repository, build it, and install it by following these instructions.


The following is a basic example of using the niswitch module to open a session to a Switch and connect channels.

import niswitch
with niswitch.Session("Dev1") as session:
    session.connect(channel1='r0', channel2='c0')

Additional examples for NI-SWITCH are located in src/niswitch/examples/ directory.

Support / Feedback

The packages included in nimi-python package are supported by NI. For support, open a request through the NI support portal at

Bugs / Feature Requests

To report a bug or submit a feature request specific to NI Modular Instruments Python bindings (nimi-python), please use the GitHub issues page.

Fill in the issue template as completely as possible and we will respond as soon as we can.

For hardware support or any other questions not specific to this GitHub project, please visit [NI Community Forums]( .. _documentation-section:


Documentation is available here.


nimi-python is licensed under an MIT-style license (see LICENSE). Other incorporated projects may be licensed under different licenses. All licenses allow for non-commercial and commercial use.

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