Python-进程运行时不断打印子进程输出

Python-进程运行时不断打印子进程输出

你可以在命令输出行之后立即使用

iter

处理行

lines = iter(fd.readline, "")

。这是显示典型用例的完整示例：

from __future__ import print_function # only Python 2.ximport subprocessdef execute(cmd):    popen = subprocess.Popen(cmd, stdout=subprocess.PIPE, universal_newlines=True)    for stdout_line in iter(popen.stdout.readline, ""):        yield stdout_line     popen.stdout.close()    return_pre = popen.wait()    if return_pre:        raise subprocess.CalledProcessError(return_pre, cmd)# Examplefor path in execute(["locate", "a"]):    print(path, end="")