# grep -rl ‘python‘ /root  搜索root目錄下文件內容包含python的文件名路徑
import os

def init(func):
    def wrapper(*args,**kwargs):
        res = func(*args,**kwargs)
        next(res)
        return res
    return wrapper

@init
def search(target):
    while True:
        search_path = yield
        g=os.walk(search_path)
        for par_dir,_,files in g:
            for file in files:
                file_abs_path = r‘%s\%s‘ % (par_dir,file)
                target.send(file_abs_path)


@init
def opener(target):
    while True:
        file_abs_path = yield
        with open(file_abs_path,‘r‘,encoding=‘utf-8‘) as f:
            target.send((file_abs_path,f))


@init
def cat(target):
    while True:
        file_abs_path,f = yield
        for line in f:
            tag =target.send((file_abs_path,line))   #註意：對於需要傳兩個yield的，在send時需要將這兩個值放在一個元組中傳遞（（））
            if tag:
                break

@init
def grep(target,pattern):
    tag = False
    while True:
        file_abs_path,line = yield tag
        tag = False
        if pattern in line:
            tag = True
            target.send(file_abs_path)

@init
def printer():
    while True:
        file_abs_path = yield
        print(file_abs_path)

#調用
x = r‘D:\Python_OldBoy\課程\day5\day5\a‘
g = search(opener(cat(grep(printer(),‘python‘))))
g=  search(opener(cat(grep(printer(),‘python‘))))
g.send(x)

grep -rl 'python' /root