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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


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

  • NI-DCPower (Python module: nidcpower)
  • NI-Digital Pattern Driver (Python module: nidigital)
  • NI-DMM (Python module: nidmm)
  • NI-FGEN (Python module: nifgen)
  • NI-ModInst (Python module: nimodinst)
  • NI-SCOPE (Python module: niscope)
  • NI Switch Executive (Python module: nise)
  • NI-SWITCH (Python module: niswitch)
  • NI-TClk (Python module: nitclk)

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 follows Python Software Foundation support policy for different versions. At this time this includes Python 3.6 and above using CPython.

NI-DMM Python API Status

NI-DMM (nidmm)  
Driver Version Tested Against 20.5.0
PyPI Version Latest NI-DMM Version
Supported Python Version NI-DMM supported Python versions
Open Issues Open Issues + Pull Requests for NI-DMM
Open Pull Requests Pull Requests for NI-DMM


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

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

$ python -m pip install nidmm~=1.4.1

Or easy_install from setuptools:

$ python -m easy_install nidmm


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 nidmm module to open a session to a DMM and perform a 5.5 digits of resolution voltage measurement in the 10 V range.

import nidmm
with nidmm.Session("Dev1") as session:
    session.configureMeasurementDigits(nidmm.Function.DC_VOLTS, 10, 5.5)
    print("Measurement: " + str(

Additional examples for NI-DMM are located in src/nidmm/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 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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Files for nidmm, version 1.4.1
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