其实旅行最大的好处,不是能见到多少人,见过多美的风景,而是走着走着,在一个际遇下,突然重新认识了自己。
首先使用内置模块os.
>>> import os >>> code = os.system("pwd && sleep 2") # /User/zhipeng >>> print code # 0
问题是 os.system 只能获取到结束状态
使用内置模块 subprocess
>>> import subprocess >>> subprocess.Popen("pwd && sleep 2", shell=True, cwd="/home") # <subprocess.Popen object at 0x106498310> # /home >>> sub = subprocess.Popen("pwd && sleep 2", shell=True, stdout=subprcess.PIPE) >>> sub.wait() >>> print sub.stdout.read() # /User/zhipeng
subprocess.Popen还支持一些别的参数 bufsize,executable=None, stdin=None, stdout=None, stderr=None preexec_fn=None, close_fds=False, shell=False, cwd=None, env=None universal_newlines=False, startupinfo=None, creationflags=0
使用第三方模块 sh
# pip install sh >>> from sh import ifconfig >>> print ifconfig("eth0") >>> from sh import bash >>> bash("pwd") Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Library/Python/2.7/site-packages/sh.py", line 1021, in __call__ return RunningCommand(cmd, call_args, stdin, stdout, stderr) File "/Library/Python/2.7/site-packages/sh.py", line 486, in __init__ self.wait() File "/Library/Python/2.7/site-packages/sh.py", line 500, in wait self.handle_command_exit_code(exit_code) File "/Library/Python/2.7/site-packages/sh.py", line 516, in handle_command_exit_code raise exc(self.ran, self.process.stdout, self.process.stderr) sh.ErrorReturnCode_126: RAN: '/bin/bash ls' STDOUT: STDERR: /bin/ls: /bin/ls: cannot execute binary file # 不能这么用 >>> from sh import ls >>> ls() # hello.txt 1.txt # ls -al >>> ls(a=True, l=True) # ls(al=True) 是不可以的
这操作太复杂了, 项目中使用也太糟心了, 也没有办法多个命令同时用.不过可以用别的方式代替
# bash -c command 可以很好的解决这个问题 # bash -c "sleep 1 && pwd" >>> result = bash(c="pwd", _timeout=1, _cwd="/home") >>> print result # -rw-r--r--@ 1 zhipeng staff 0 10 13 18:30 hello.txt # -rw-r--r--@ 1 zhipeng staff 0 10 13 18:30 1.txt >>> result = bash(c="pwd", _timeout=1, _cwd="/") >>> print result # / >>> bash(c="pwd && sleep 2", _timeout=1) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Library/Python/2.7/site-packages/sh.py", line 1021, in __call__ return RunningCommand(cmd, call_args, stdin, stdout, stderr) File "/Library/Python/2.7/site-packages/sh.py", line 486, in __init__ self.wait() File "/Library/Python/2.7/site-packages/sh.py", line 498, in wait raise TimeoutException(-exit_code) sh.TimeoutException
参数里面可以添加非命令参数. 需要以_开头, 例如上面的_timeout, _cwd. 详见sh.py 源码 还支持以下参数 internal_bufsize, err_bufsize, tee, done, in, decode_errors, tty_in, out, cwd, timeout_signal, bg, timeout, with, ok_code, err, env, no_out,
参考:
https://github.com/amoffat/sh/blob/master/sh.py
https://github.com/amoffat/sh
以上这篇Python 运行 shell 获取输出结果的实例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持。