过滤莫文件夹下所有文件和子文件夹中的文件，并把路径打印出-----面对过程的编程

import os

def init(func):

    def wrapper(*args,**kwargs):

        res = func(*args,**kwargs)

        next(res)

        return res

    return wrapper



@init

def search(target):

    '找到文件的绝对路径'

    while True:

        dir_name = yield

        g = os.walk(dir_name)

        for i in g:

            for j in i[-1]:

                if len(j.split('.'))==1:

                     file_path = '%s\%s'%(i[0],j)

                     #print(file_path)

                     target.send(file_path)



@init

def opener(target):

    '打开文件，获取文件句柄'

    while True:

        file_path = yield

        with open(file_path,encoding='utf-8') as f:

            target.send((file_path,f))



@init

def cat(target):

    '读取文件内容'

    while True:

        file_path,f=yield

        for line in f:

            target.send((file_path,line))

            

@init

def grep(pattern,target):

    '过滤一行内容中有无Python'

    while True:

        file_path,line = yield

        if pattern in line:

            target.send(file_path)

            

@init

def unrepeat(target):

    '去重相同的文件路径'

    file_path_l =''

    while True:

        file_path =yield

        if file_path !=  file_path_l:

            target.send(file_path)

            file_path_l=file_path



@init

def printer():

    '打印文件路径'

    while True:

        file_path = yield

        print(file_path)



g = search(opener(cat(grep('error',unrepeat(printer())))))

g.send('d:\Program Files(x86)\py_fallstack_s4')