venture of iit bombay vjti alumni pythonpath it has role similar to path this variable tells the python interpreter where to locate the module files imported into program it should include the python source library directory and the directories containing python source code pythonpath is sometimes preset by the python installer pythonstartup it contains the path of an initialization file containing python source code it is executed every time you start the interpreter it is named as pythonrc py in unix and it contains commands that load utilities or modify pythonpath pythoncaseok it is used in windows to instruct python to find the first caseinsensitive match in an import statement set this variable to any value to activate it pythonhome