Python常用外部指令执行代码实例

# -*- encoding=utf-8 -*-
import os
if __name__ == '__main__':
  pass
  print('开始')
  ret1 = os.system('python')
  print('ret1:{}'.format(ret1))
  ret2 = os.system('java -version')
  print('ret2:{}'.format(ret2))
  print('结束')

# -*- encoding=utf-8 -*-

import os

if __name__ == '__main__':
  pass
  print('开始')
  ret1 = os.system('java -version')
  print('ret1:{}'.format(ret1))
  ret2 = os.system('java -version')
  print('ret2:{}'.format(ret2))
  print('结束')

# -*- encoding=utf-8 -*-
import os
if __name__ == '__main__':
  pass
  print('开始')
  os.popen('python')
  ret2 = os.popen('java -version')
  print('结束')

# -*- encoding=utf-8 -*-
import os
if __name__ == '__main__':
  pass
  print('开始')
  ret1 = os.popen('python')
  print(ret1.read())
  ret2 = os.popen('java -version')
  print(ret2.read())
  print('结束')

# -*- encoding=utf-8 -*-
import commands
if __name__ == '__main__':
  pass
  print('开始')
  ret1 = commands.getstatusoutput('python')
  ret2 = commands.getstatusoutput('java -version')
  print('结束')

# -*- encoding=utf-8 -*-
import commands
if __name__ == '__main__':
  pass
  print('开始')
  ret1 = commands.getstatusoutput('python')
  print ret1[0]
  print ret1[1]
  print '=============='
  ret2 = commands.getstatusoutput('java -version')
  print ret2[0]
  print ret2[1]
  print '=============='
  print('结束')

# -*- encoding=utf-8 -*-
import subprocess
if __name__ == '__main__':
  pass
  print('开始')
  s1 = subprocess.Popen('python')
  s1.wait()
  s2 = subprocess.Popen('java -version')
  s2.wait()
  print('结束')

# -*- encoding=utf-8 -*-
import subprocess
if __name__ == '__main__':
  pass
  print('开始')
  with open('s1.txt', 'w') as f:
    s1 = subprocess.Popen('python', stdout=f, ) # 指定输出重定向到文件
    s1.wait(10) # 超过10秒还没执行完会抛出异常
  with open('s2.txt', 'w') as f:
    s2 = subprocess.Popen('java -version', stdout=f, stderr=f) # 指定输出和错误都重定向到文件
    s2.wait()
  print('结束')

# -*- encoding=utf-8 -*-

import subprocess

if __name__ == '__main__':
  pass
  print('开始')
  s1 = subprocess.Popen('java -version', stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  s1.wait(10) # 超过10秒还没执行完会抛出异常
  print(s1.returncode) # 结果码
  print(s1.poll()) # 已经执行结束返回结果码，否则返回None
  std1 = s1.stdout.read()
  print('std_out:{}'.format(std1))
  std2 = s1.stderr.read()
  print('std_err:{}'.format(std2))
  print('结束')

# -*- encoding=utf-8 -*-
import subprocess
if __name__ == '__main__':
  pass
  print('开始')
  s1 = subprocess.call('java -version', )
  print(s1)
  s2 = subprocess.call('python', )
  print(s2)
  s3 = subprocess.call('python', timeout=3) # 超时抛出异常
  print(s3)
  print('结束')

# -*- encoding=utf-8 -*-
import subprocess
if __name__ == '__main__':
  pass
  print('开始')
  s1 = subprocess.check_call('java -version', )
  print(s1)
  s2 = subprocess.check_output('java -version', )
  print(s2)
  print('结束')