无法使用OS.system从python运行可执行文件

Question

我想从python运行脚本，其运行方式为：./cj 3 0.01 2 < matrix.txt。当我在代码中使用以下代码时：os.system('./cj 80 0.01 2 < temp')。它返回状态码512。temp是c程序的输入，就像matrix.txt

Answer 1

您应该尝试使用子流程模块：

import subprocess

process = subprocess.Popen(["./cj", "80", "0.01", "2", "<", "temp"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = process.communicate()
if process.returncode:
    print("Return code: %s STDERR: %s" % (process.returncode, stderr))