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.

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.

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 -- ./mypythonscript.py

A simple use of the API is::

from pycallgraph2 import PyCallGraph
from pycallgraph2.output import GraphvizOutput

with PyCallGraph(output=GraphvizOutput()):
    code_to_profile()

Documentation for the fork is a work in progress.