mock.py 文件源码

def open(self, path, mode='r', errors=None):
        stream = self.opened.get(path)
        if not stream:
            if mode[0] == 'r':
                raise FileNotFoundError(path)
            stream = self.opened[path] = BytesIO()
        stream.seek(0)
        stream = BufferedRandom(stream) if mode[-1] == 'b' else TextIOWrapper(stream)
        stream.close = stream.flush

        return stream