python調用其他腳本

1.用python調用python腳本

#!/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')

另外一個python腳本b.py如下：

#!/usr/local/bin/python3.7
print('hello world')

運行結果：

[python@master2 while]$ python a.py 
hello world
0
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調用shell方法os.system()

#!/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腳本如下：

#!/bin/sh
echo "hello world"

運行結果：

[python@master2 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調用shell方法os.popen()

#!/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')

運行結果：

[python@master2 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() 這個方法會打開一個管道，返回結果是一個連接管道的文件對象，該文件對象的操作方法同open()，可以從該文件對象中讀取返回結果。如果執行成功，不會返回狀態碼，如果執行失敗，則會將錯誤信息輸出到stdout，並返回一個空字符串。這里官方也表示subprocess模塊已經實現了更為強大的subprocess.Popen()方法。