Python調(diào)用python a.py腳本

# main.py
import time
import os 
count = 0
str = ('python a.py')
result = os.system(str)
print(result)
while True:
  count = count + 1
  if count == 5:
   print('this count is:',count) 
   break
  else:
   time.sleep(1)
   print('this count is:',count)  

# a.py
print('hello world')

• 輸出

> python main.py
hello world
this count is: 1
this count is: 2
this count is: 3
this count is: 4
this count is: 5

Python調(diào)用shell方法os.system()

# main.py
import time
import os 
count = 0
# 返回值是腳本的退出狀態(tài)碼
n = os.system('sh a.sh')
while True:
  count = count + 1
  if count == 5:
   print('this count is:',count) 
   break
  else:
   time.sleep(1)
   print('this count is:',count)  

# a.sh
echo "hello world"

• 輸出

> python main.py
hello world
this count is: 1
this count is: 2
this count is: 3
this count is: 4
this count is: 5

Python調(diào)用shell方法os.popen()

import os
if __name__ == "__main__":
    print("this is a test file ")
    cmd = "ls"
    # 返回值是腳本執(zhí)行過程中的輸出內(nèi)容
    val = os.popen(cmd)
    print(val)
    print(val.read())

• 像調(diào)用”ls”這樣的shell命令，應(yīng)該使用popen的方法來獲得內(nèi)容