python-call-graph 2.0.0

Python Call Graph is a library and command line tool that visualises the flow of your Python application. See http://pycallgraph.slowchop.com/ for more information.

Python Call Graph

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

Screenshots

Click on the images below to see a larger version and the source code that generated them.

Project Status

The latest version is 2.0.0 which was released on 2024-03-31, and is a backwards incompatible from the previous release, dropped 2.7 support and is targetting the quite old Python 3.5.

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 documentation needs some work stiil. Feel free to contribute :smile:

Features

• Support for Python 3.5.
• 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

Installation is easy as

pip install pycallgraph

You can either use the command-line interface for a quick visualization of your Python script, or the pycallgraph module for more fine-grained settings.

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 pycallgraph import PyCallGraph
from pycallgraph.output import GraphvizOutput

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

Documentation

Feel free to browse the documentation of pycallgraph for the usage guide and API reference.