The pyclbr can be used to determine some limited information about the classes and methods defined in a module. The information provided is sufficient to implement a traditional three-pane class browser. The information is extracted from the source code rather than from an imported module, so this module is safe to use with untrusted source code. This restriction makes it impossible to use this module with modules not implemented in Python, including many standard and optional extension modules.
sys.path, which is used to locate module source code.