在Linux中使用python执行Shell命令

os.system() 只返回命令的退出状态(而不是 STDOUT ). 你应该使用 subprocess 模块,尤其是 subprocess.Popen

代码:

import subprocess
import sys


def call_command(command):
    """
    Call a command the STDOUT
    :param command: The related command
    :return: STDOUT as string
    """

    result1 = subprocess.Popen(
        command.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True
    )

    #  Get the STDOUT and STDERR descriptors of the command.
    std_out, std_err = result1.communicate()

    return std_out


# Find files in test1 folder.
find_result = call_command("find test1/ -type f")
for one_find in find_result.split("\n"):
    if one_find:
        # The result of cat command will be in "cat_result" variable.
        cat_result = call_command("cat {}".format(one_find))
        print(cat_result)

        # You can write the result directly to STDOUT with the following line.
        # sys.stdout.write("\n".join(call_command("cat {}".format(one_find))))

内容 test1

>>> ll test1/
total 8
drwxrwxr-x  2 user grp 4096 Jul  8 14:18 ./
drwxrwxr-x 18 user grp 4096 Jul  8 14:33 ../
-rw-rw-r--  1 user grp 29 Jul  8 14:18 test_file.txt

内容 test_file.txt :

>>> cat test1/test_file.txt 
Contents of test_file.txt file

代码输出:

>>> python3 test.py
Contents of test_file.txt file.