stubs.py 文件源码

def __init__(self, filename, mode='r', bufsize=-1, **kwargs):
    """Initializer. See file built-in documentation."""
    if mode not in FakeFile.ALLOWED_MODES:
      raise IOError(errno.EROFS, 'Read-only file system', filename)

    if not FakeFile.is_file_accessible(filename):
      raise IOError(errno.EACCES, 'file not accessible', filename)

    super(FakeFile, self).__init__(filename, mode, bufsize, **kwargs)