Python Cookbook

Importing Modules with Automatic End-of-Line Conversions

Credit: David Goodger

Problem

You need to move (or share, via a network-shared filesystem) .py modules between different platforms without worrying about the different ways the platforms represent end-of-line.

Solution

Python’s import hooks are mostly used for advanced, complicated tasks, but can sometimes come in handy for a simple system-administration task, such as dealing with this recipe’s problem. Put this code in your sitecustomize.py, which can be located anywhere on sys.path, and you’ll be able to import Python modules with any Unix, Mac, or Windows line endings:

import ihooks, imp, py_compile

class MyHooks(ihooks.Hooks):
    def load_source(self, name, filename, file=None):
        """ Compile source files with any line ending. """
        if file:
            file.close(  )
        py_compile.compile(filename) # Line-ending conversion is in here cfile = open(filename + (_ _debug_ _ and 'c' or 'o'), 'rb') try: return self.load_compiled(name, filename, cfile) finally: cfile.close( ) class MyModuleLoader(ihooks.ModuleLoader): def load_module(self, name, stuff): """ Special-case package directory imports """ file, filename, (suff, mode, type) = stuff path = None if type == imp.PKG_DIRECTORY: stuff = self.find_module_in_dir("_ _init_ _", filename, 0) file = stuff[0] # package/_ _init_ _.py path = [filename] try: # Let superclass handle the rest module = ihooks.ModuleLoader.load_module(self, name, stuff) finally: if file: file.close( ) if path: module._ _path_ ...