PyVISA-py
Pure Python implementation of a VISA library.
Decision gist · record as of 2026-08-14
Yes, if you need to control laboratory instruments via VISA and want to avoid proprietary library dependencies. The package is actively maintained, has low install friction, carries a permissive MIT license, and supports current Python versions. Install it as a pyvisa backend when vendor VISA libraries are unavailable or when cross-platform portability is required. No known vulnerabilities as of the fact sheet date.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires pyvisa to be installed; optional platform-specific dependencies (PySerial, PyUSB, linux-gpib, gpib-ctypes, psutil, zeroconf, pyvicp) needed for specific instrument types or discovery features.
- Low friction: pure Python wheel with only pyvisa and typing_extensions as runtime dependencies.
- Actively maintained with recent commits and Beta stability status.
License · maintenance · safety
permissive license (permissive) — MIT license permits unrestricted use, modification, and distribution in both open and closed projects with minimal obligations—only attribution and license inclusion required.
last release 2025-09-04 (344 days) · last repo commit 2026-08-13 · 358 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 849,120 downloads/mo, #4,909 on PyPI
Alternatives
Verify before relying
pip install pyvisa-py
import pyvisa
rm = pyvisa.ResourceManager('@py')
inst = rm.open_resource('GPIB0::1::INSTR')
response = inst.query('*IDN?')- Extent of VISA method coverage beyond message-based communication (e.g., raw socket, service request, event handling).
- Performance characteristics compared to native VISA libraries for high-throughput or latency-sensitive applications.
- Completeness of cross-platform GPIB support, particularly on Windows with gpib-ctypes.
What it is and what it does
PyVISA-py implements the VISA standard—a widely used protocol for controlling laboratory instruments—entirely in Python, eliminating the need to install proprietary VISA libraries from vendors like National Instruments or Keysight. It acts as a backend to the pyvisa package, translating high-level instrument commands into low-level communication over Serial, USB, GPIB, and Ethernet interfaces. The package uses well-maintained cross-platform Python libraries (PySerial, PyUSB, etc.) to handle the actual I/O, making it portable across Windows, macOS, and Linux.
Typical use is in measurement automation, data acquisition, and laboratory control scripts where you need to query or command instruments without vendor lock-in. You install it, tell pyvisa to use the '@py' backend, and then use standard VISA resource names to open connections to instruments. Optional dependencies unlock additional features like GPIB support, device discovery, and proprietary protocols.
Use it for
- Automate multi-instrument measurement sequences in a lab without installing vendor VISA libraries.
- Query and control USB or serial instruments from a Python script on Linux, macOS, or Windows.
- Discover TCPIP instruments across network interfaces using psutil integration.
- Develop portable instrument control code that runs on multiple operating systems without recompilation.
- Integrate laboratory equipment into data acquisition pipelines using standard VISA resource addressing.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need to control laboratory instruments via VISA and want to avoid proprietary library dependencies.
The package is actively maintained, has low install friction, carries a permissive MIT license, and supports current Python versions. Install it as a pyvisa backend when vendor VISA libraries are unavailable or when cross-platform portability is required. No known vulnerabilities as of the fact sheet date.
Install
pyvisa-py on PyPI
Before you install
Low friction: pure Python wheel with only pyvisa and typing_extensions as runtime dependencies. Actively maintained with recent commits and Beta stability status. Supports Python 3.10–3.13 across macOS, Windows, and Linux.
Requires pyvisa to be installed; optional platform-specific dependencies (PySerial, PyUSB, linux-gpib, gpib-ctypes, psutil, zeroconf, pyvicp) needed for specific instrument types or discovery features.
License in practice
MIT license permits unrestricted use, modification, and distribution in both open and closed projects with minimal obligations—only attribution and license inclusion required.
Quickstart
pip install pyvisa-py
import pyvisa
rm = pyvisa.ResourceManager('@py')
inst = rm.open_resource('GPIB0::1::INSTR')
response = inst.query('*IDN?')Verify before relying
- Extent of VISA method coverage beyond message-based communication (e.g., raw socket, service request, event handling).
- Performance characteristics compared to native VISA libraries for high-throughput or latency-sensitive applications.
- Completeness of cross-platform GPIB support, particularly on Windows with gpib-ctypes.
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagespyvisatyping_extensions |
| Maintenance | Actively maintained 344 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 849,120 / month, #4,909 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 4 - BetaIntended Audience :: DevelopersIntended Audience :: Science/ResearchLicense :: OSI Approved :: MIT LicenseOperating System :: MacOS :: MacOS XOperating System :: Microsoft :: WindowsOperating System :: POSIX :: LinuxProgramming Language :: PythonProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Topic :: Scientific/Engineering :: Interface Engine/Protocol TranslatorTopic :: Software Development :: Libraries :: Python Modules |
Evidence: pyvisa_py-0.8.1-py3-none-any.whl
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See also PyVISA · PyVISA-sim · RsInstrument · MultiPyVu · pysoem · pyusb · pyftdi · hid · pylibftdi · zhinst-toolkit