python - subprocess.communicate() 在写入输入后是否关闭标准输入？

Question

虽然这看起来合乎逻辑，但documentation没有明确说明:

Interact with process: Send data to stdin. Read data from stdout and stderr, until end-of-file is reached. Wait for process to terminate.

Answer 1

从来源来看，我认为答案是肯定的:

• 当超时为 None 时，communicate() 调用 self._stdin_write(input)
  https://github.com/python/cpython/blob/master/Lib/subprocess.py#L826-L827

• 否则 _communicate() 调用 self._stdin_write(input)
  https://github.com/python/cpython/blob/master/Lib/subprocess.py#L1078-L1079

• 在每种情况下，_stdin_write()都会在self.stdin.write(input)之后调用self.stdin.close()
  https://github.com/python/cpython/blob/master/Lib/subprocess.py#L793