改进以获得更好的日志记录。 为了获得更好的输出，可以使用迭代器。 从下面开始，我们变得更好

from subprocess import Popen, getstatusoutput, PIPE
def shell_command(cmd):
    result = Popen(cmd, shell=True, stdout=PIPE, stderr=PIPE)

    output = iter(result.stdout.readline, b'')
    error = iter(result.stderr.readline, b'')
    print("##### OutPut ###")
    for line in output:
        print(line.decode("utf-8"))
    print("###### Error ########")
    for line in error:
        print(error.decode("utf-8")) # Convert bytes to str

    status, terminal_output = run_command(cmd)
    print(terminal_output)

shell_command("ls") # this will display all the files & folders in directory

使用getstatusoutput的其他方法(容易理解)

from subprocess import Popen, getstatusoutput, PIPE

status_Code, output = getstausoutput(command)
print(output) # this will give the terminal output

# status_code, output = getstatusoutput("ls") # this will print the all files & folder available in the directory

这要简单得多，但只适用于Unix(包括Cygwin)和Python2.7。

import commands
print commands.getstatusoutput('wc -l file')

它返回一个元组(return_value, output)。

对于在Python2和Python3中都可以工作的解决方案，请使用subprocess模块:

from subprocess import Popen, PIPE
output = Popen(["date"],stdout=PIPE)
response = output.communicate()
print response

如果您需要在多个文件上运行shell命令，这对我来说很有用。

import os
import subprocess

# Define a function for running commands and capturing stdout line by line
# (Modified from Vartec's solution because it wasn't printing all lines)
def runProcess(exe):    
    p = subprocess.Popen(exe, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    return iter(p.stdout.readline, b'')

# Get all filenames in working directory
for filename in os.listdir('./'):
    # This command will be run on each file
    cmd = 'nm ' + filename

    # Run the command and capture the output line by line.
    for line in runProcess(cmd.split()):
        # Eliminate leading and trailing whitespace
        line.strip()
        # Split the output 
        output = line.split()

        # Filter the output and print relevant lines
        if len(output) > 2:
            if ((output[2] == 'set_program_name')):
                print filename
                print line

编辑:刚刚看到Max Persson的解决方案和J.F. Sebastian的建议。继续把它整合进去。

可以将输出重定向到文本文件，然后将其读回来。

import subprocess
import os
import tempfile

def execute_to_file(command):
    """
    This function execute the command
    and pass its output to a tempfile then read it back
    It is usefull for process that deploy child process
    """
    temp_file = tempfile.NamedTemporaryFile(delete=False)
    temp_file.close()
    path = temp_file.name
    command = command + " > " + path
    proc = subprocess.run(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
    if proc.stderr:
        # if command failed return
        os.unlink(path)
        return
    with open(path, 'r') as f:
        data = f.read()
    os.unlink(path)
    return data

if __name__ == "__main__":
    path = "Somepath"
    command = 'ecls.exe /files ' + path
    print(execute(command))

拆分子进程的初始命令可能非常棘手和麻烦。

使用shlex.split()来帮助自己。

示例命令

Git log -n 5——5年前到2年前

的代码

from subprocess import check_output
from shlex import split

res = check_output(split('git log -n 5 --since "5 years ago" --until "2 year ago"'))
print(res)
>>> b'commit 7696ab087a163e084d6870bb4e5e4d4198bdc61a\nAuthor: Artur Barseghyan...'

如果没有shlex.split()，代码将如下所示

res = check_output([
    'git', 
    'log', 
    '-n', 
    '5', 
    '--since', 
    '5 years ago', 
    '--until', 
    '2 year ago'
])
print(res)
>>> b'commit 7696ab087a163e084d6870bb4e5e4d4198bdc61a\nAuthor: Artur Barseghyan...'

下面是一个简单而灵活的解决方案，适用于各种操作系统版本，以及Python 2和3，在shell模式下使用IPython:

from IPython.terminal.embed import InteractiveShellEmbed
my_shell = InteractiveShellEmbed()
result = my_shell.getoutput("echo hello world")
print(result)

Out: ['hello world']

它有几个优点

它只需要安装IPython，所以在使用它时，你真的不需要担心特定的Python或操作系统版本，它附带Jupyter -具有广泛的支持 它默认接受一个简单的字符串-所以不需要使用shell模式参数或字符串拆分，使它在我看来稍微干净一些 它还使替换变量甚至字符串本身的整个Python命令更加干净

为了演示:

var = "hello world "
result = my_shell.getoutput("echo {var*2}")
print(result)

Out: ['hello world hello world']

只是想给你一个额外的选择，特别是如果你已经安装了Jupyter

当然，如果你在一个实际的Jupyter笔记本，而不是一个.py脚本，你也可以总是这样做:

result = !echo hello world
print(result)

为了达到同样的目的。