---
id: pyats-tcl
version: "26.7"
license: Apache 2.0
license_treatment: permissive
maintenance: active
---

# pyats.tcl — pyATS Tcl: Tcl Integration and Objects

License: permissive · Maintenance: active · Downloads: 295.1K/mo

## What it is and what it does

pyats.tcl is a sub-component of the pyATS end-to-end testing framework that bridges Python and Tcl by wrapping the tkinter module. It provides improved interfaces and data structure casting for Tcl integration within test automation workflows. The package is part of Cisco's broader pyATS ecosystem, which is designed for data-driven, reusable testing in Agile environments.

The package supports modern Python versions (3.8 through 3.14) on Linux and macOS, distributed as pre-built wheels. It depends on pyats.datastructures and pyats.log, making it most useful when integrated into a larger pyATS test suite rather than as a standalone tool. The wrapper abstracts some of tkinter's lower-level details to make Tcl objects easier to work with in Python test code.

Use it for:

- Integrating Tcl scripts or Tcl-based tools into Python-driven test automation workflows within pyATS.
- Casting and handling Tcl data structures in Python test cases without manual type conversion.
- Building reusable test libraries that need to call Tcl functions from Python test code.
- Extending pyATS test suites with Tcl-based network or device automation components.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Wraps Python's tkinter module to provide Tcl integration and object interfaces within the pyATS testing ecosystem, enabling better data structure casting and interface handling for test automation.

Yes, if you are already using pyATS for test automation and need Tcl integration. The package is actively maintained, has no known vulnerabilities, and supports current Python versions. Install friction is moderate due to compiled wheels, but binaries are readily available. Not recommended as a standalone tool—it is a specialized sub-component designed to work within the pyATS ecosystem.

## Install

pip install pyats-tcl
uv add pyats-tcl
poetry add pyats-tcl

## Installing pyats.tcl

Before you install: Active maintenance with a release 7 days ago. Medium install friction due to compiled wheels across multiple Python versions (3.10–3.14) and platforms (macOS, Linux x86_64, aarch64, musllinux), but pre-built binaries are available.

License in practice: Apache 2.0 permissive license allows use in commercial and proprietary projects with minimal restrictions.

Quickstart:

pip install pyats.tcl

from pyats.tcl import Tcl

tcl_obj = Tcl()

Requires Python 3.8 or later; Linux and macOS only (Windows not supported).

Verify before relying:

- Specific Tcl version requirements or compatibility constraints not stated in the fact sheet.
- Whether tkinter must be separately installed on the system or is bundled with the wheel.
- Concrete examples of 'better interface & datastructure casting' compared to raw tkinter.

## Package facts

- License: Apache 2.0 (permissive)
- Python support: supports_current
- Install friction: medium
- Maintenance: active
- Downloads: 295.1K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

tcl python integration, tkinter wrapper testing, pyats tcl component, test automation tcl, data structure casting tcl, test-automation, tcl-integration, cisco-pyats

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