PyLab Import Python files from disk, call their functions, and automatically reload the code when the files change.
PyLastError Returns the last error occurred when calling a plug-in function other than itself.
PyPop A helper function to use as a callback to retrieve objects from the plug-in (e.g. to set variables). The function purpose is purely internal and technical, so it does not appear in the list of functions.
PyRun Call a Python function and return the result. This is the main way to call custom Python functions from FileMaker. You need this function if you're going to write your own functions in Python to call from FileMaker.