jacktangj 2020-01-05
#!/usr/local/bin/python3.7 import time import os count = 0 str = (‘python b.py‘) result1 = os.system(str) print(result1) while True: count = count + 1 if count == 8: print(‘this count is:‘,count) break else: time.sleep(1) print(‘this count is:‘,count) print(‘Good Bye‘)
另外一个python脚本b.py如下:
#!/usr/local/bin/python3.7 print(‘hello world‘)
运行结果:
[ while]$ python a.py hello world this count is: 1 this count is: 2 this count is: 3 this count is: 4 this count is: 5 this count is: 6 this count is: 7 this count is: 8 Good Bye
2.python调用shell方法os.system()
‘‘‘ 遇到问题没人解答?小编创建了一个Python学习交流QQ群:579817333 寻找有志同道合的小伙伴,互帮互助,群里还有不错的视频学习教程和PDF电子书! ‘‘‘ #!/usr/local/bin/python3.7 import time import os count = 0 n = os.system(‘sh b.sh‘) while True: count = count + 1 if count == 8: print(‘this count is:‘,count) break else: time.sleep(1) print(‘this count is:‘,count) print(‘Good Bye‘)
shell脚本如下:
#!/bin/sh echo "hello world"
运行结果:
[ while]$ python a.py hello world this count is: 1 this count is: 2 this count is: 3 this count is: 4 this count is: 5 this count is: 6 this count is: 7 this count is: 8 Good Bye
3.python调用shell方法os.popen()
‘‘‘ 遇到问题没人解答?小编创建了一个Python学习交流QQ群:579817333 寻找有志同道合的小伙伴,互帮互助,群里还有不错的视频学习教程和PDF电子书! ‘‘‘ #!/usr/local/bin/python3.7 import time import os count = 0 n = os.system(‘sh b.sh‘) while True: count = count + 1 if count == 8: print(‘this count is:‘,count) break else: time.sleep(1) print(‘this count is:‘,count) print(‘Good Bye‘)
运行结果:
[ while]$ python a.py <os._wrap_close object at 0x7f7f89377940> [‘hello world\n‘] this count is: 1 this count is: 2 this count is: 3 this count is: 4 this count is: 5 this count is: 6 this count is: 7 this count is: 8 Good Bye
os.system.popen() 这个方法会打开一个管道,返回结果是一个连接管道的文件对象,该文件对象的操作方法同open(),可以从该文件对象中读取返回结果。如果执行成功,不会返回状态码,如果执行失败,则会将错误信息输出到stdout,并返回一个空字符串。这里官方也表示subprocess模块已经实现了更为强大的subprocess.Popen()方法。