subprocess模塊(瞭解)

目錄

• 1、subprocess模塊

1、subprocess模塊

subprocess模塊容許你去建立一個新的進程讓其執行另外的程序，並與它進行通訊，獲取標準的輸入、標準輸出、標準錯誤以及返回碼等。更多查看官網：https://docs.python.org/2/library/subprocess.html?highlight=subprocess#frequently-used-arguments

import subprocess
import subprocess
'''
sh-3.2# ls /Users/nick/Desktop |grep txt$
mysql.txt
tt.txt
事物.txt
'''

res1 = subprocess.Popen('ls /Users/jieli/Desktop',
                        shell=True,
                        stdout=subprocess.PIPE)
res = subprocess.Popen('grep txt$',
                       shell=True,
                       stdin=res1.stdout,
                       stdout=subprocess.PIPE)

print(res.stdout.read().decode('utf-8'))

# 等同於上面,可是上面的優點在於,一個數據流能夠和另一個數據流交互,能夠經過爬蟲獲得結果真後交給grep
res1 = subprocess.Popen('ls /Users/jieli/Desktop |grep txt$',
                        shell=True,
                        stdout=subprocess.PIPE)
print(res1.stdout.read().decode('utf-8'))

# windows下:
# dir | findstr 'test*'
# dir | findstr 'txt$'
res1 = subprocess.Popen(r'dirC:\Users\Administrator\PycharmProjects\test\函數備課',
                        shell=True,
                        stdout=subprocess.PIPE)
res = subprocess.Popen('findstr test*',
                       shell=True,
                       stdin=res1.stdout,
                       stdout=subprocess.PIPE)

# subprocess使用當前系統默認編碼，獲得結果爲bytes類型，在windows下須要用gbk解碼
print(res.stdout.read().decode('gbk'))