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Python Call Graph is a Python module that creates call graph visualizations for Python applications.

Project description


Python Call Graph

Note: This is a fork of the original pycallgraph since it became unmaintained.

Welcome! pycallgraph2 is a Python module that creates call graph visualizations for Python applications.

Project Status

The project lives on GitHub, where you can report issues, contribute to the project by forking the project then creating a pull request, or just browse the source code.

The fork needs documentation. Feel free to contribute :)

License: GNU GPLv2


  • Support for Python 2.7+ and Python 3.3+.
  • Static visualizations of the call graph using various tools such as Graphviz and Gephi.
  • Execute pycallgraph from the command line or import it in your code.
  • Customisable colors. You can programatically set the colors based on number of calls, time taken, memory usage, etc.
  • Modules can be visually grouped together.
  • Easily extendable to create your own output formats.

Quick Start

OS dependencies:

  • Graphviz is open source software and can be installed on Ubuntu/Debian via apt install graphviz, or equivalent on other distributions. See here for more information.

Installation is easy as:

pip install pycallgraph2

The following examples specify graphviz as the outputter, so it's required to be installed. They will generate a file called pycallgraph.png.

The command-line method of running pycallgraph is::

$ pycallgraph graphviz -- ./

A simple use of the API is::

from pycallgraph2 import PyCallGraph
from pycallgraph2.output import GraphvizOutput

with PyCallGraph(output=GraphvizOutput()):


Documentation for the fork is a work in progress.

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