librsync.py 文件源码

def __init__(self, basis_file, delta_file):
        """PatchedFile initializer - call with basis delta

        Here basis_file must be a true Python file, because we may
        need to seek() around in it a lot, and this is done in C.
        delta_file only needs read() and close() methods.

        """
        LikeFile.__init__(self, delta_file)
        if hasattr(basis_file, 'file'):
            basis_file = basis_file.file
        if type(basis_file) is not types.FileType:
            raise TypeError("basis_file must be a (true) file")
        try: self.maker = _librsync.new_patchmaker(basis_file)
        except _librsync.librsyncError, e: raise librsyncError(str(e))