subprocess模塊

import  subprocess

‘‘‘
sh-3.2# ls /Users/egon/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,但是上面的優勢在於,一個數據流可以和另外一個數據流交互,可以通過爬蟲得到結果然後交給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$‘
import subprocess
res1=subprocess.Popen(r‘
 
dir C:\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)

print(res.stdout.read().decode(‘gbk‘)) #subprocess使用當前系統默認編碼，得到結果為bytes類型，在windows下需要用gbk解碼

logging模塊

用於便捷記錄日誌且線程安全的模塊

subprocess和logging模塊