一、subprocess模块

subprocess模块允许你去创建一个新的进程让其执行另外的程序，并与它进行通信，获取标准的输入、标准输出、标准错误以及返回码等。更多查看官网：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$‘, shell=True, stdin=res1.stdout, stdout=subprocess.PIPE) print(res.stdout.read().decode(‘utf-8‘)) # 等同于上面,但是上面的优势在于,一个数据流可以和另外一个数据流交互,可以通过爬虫得到结果然后交给grep res1 = subprocess.Popen(‘ls /Users/jieli/Desktop |grep txt$‘, 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\函数备课‘, shell=True, stdout=subprocess.PIPE) res = subprocess.Popen(‘findstr test*‘, shell=True, stdin=res1.stdout, stdout=subprocess.PIPE) # subprocess使用当前系统默认编码，得到结果为bytes类型，在windows下需要用gbk解码 print(res.stdout.read().decode(‘gbk‘))

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