Pyrasite is a library and a set of tools for injecting arbitrary code into running Python processes.

Pyrasite works with Python 2.4 and newer. Injection works between versions as well, so you can run Pyrasite under Python 3 and inject into 2, and vice versa.

Usage:

pyrasite [-h] [--gdb-prefix GDB_PREFIX] [--verbose] pid [filename]
 
 pyrasite - inject code into a running python process
 
 positional arguments:
   pid                   The ID of the process to inject code into
   filename              The second argument must be a filename
 
 optional arguments:
   -h, --help            show this help message and exit
   --gdb-prefix GDB_PREFIX
                         GDB prefix (if specified during installation)
   --verbose             Verbose mode
 

The Pyrasite-GUI is a graphical interface for Pyrasite that lets you easily monitor, analyze, introspect, and alter running Python programs.