popen.py 文件源码

def eof(self):
    ### should be calling file.eof() here instead of file.close(), there
    ### may be data in the pipe or buffer after the process exits
    if sys.platform == "win32":
      r = win32event.WaitForMultipleObjects(self.wait_for, 1, 0)
      if r == win32event.WAIT_OBJECT_0:
        self.file.close()
        self.file = None
        return win32process.GetExitCodeProcess(self.child_pid)
      return None

    if self.thread and self.thread.isAlive():
      return None

    pid, status = os.waitpid(self.child_pid, os.WNOHANG)
    if pid:
      self.file.close()
      self.file = None
      return status
    return None