bccache.py 文件源码

def load_bytecode(self, f):
        """Loads bytecode from a file or file like object."""
        # make sure the magic header is correct
        magic = f.read(len(bc_magic))
        if magic != bc_magic:
            self.reset()
            return
        # the source code of the file changed, we need to reload
        checksum = pickle.load(f)
        if self.checksum != checksum:
            self.reset()
            return
        # if marshal_load fails then we need to reload
        try:
            self.code = marshal_load(f)
        except (EOFError, ValueError, TypeError):
            self.reset()
            return