httpimport.py 文件源码

def __fetch_compiled(self, url) :
        import marshal
        module_src = None
        try :
            module_compiled = urlopen(url + 'c').read()  # from blah.py --> blah.pyc
            try :
                module_src = marshal.loads(module_compiled[8:]) # Strip the .pyc file header of Python up to 3.3
                return module_src
            except ValueError :
                pass
            try :
                module_src = marshal.loads(module_compiled[12:])# Strip the .pyc file header of Python 3.3 and onwards (changed .pyc spec)
                return module_src
            except ValueError :
                pass
        except IOError as e:
            logger.debug("[-] No compiled version ('.pyc') for '%s' module found!" % url.split('/')[-1])
        return module_src