面向过程的程序设计

import os,time
def init(func):
    def wrapper(*args,**kwargs):
        res = func(*args,**kwargs)
        next(res)
        return res
    return wrapper
‘‘‘
@init
def eater(name):
    print(‘%s start to eat‘%name)
    food_list = []
    while True:
        food = yield food_list
        print(‘%s eat %s‘%(name, food))
        food_list.append(food)

‘‘‘


#过程式编程

#找到一个绝对路径，往下一个阶段发一个
@init
def search(target):       ##search的参数是opener的运行结果
    ‘找到文件的绝对路径‘
    while True:
        dir_name = yield
        print(‘车间search开始生产产品：文件的绝对路径‘)
        time.sleep(0.2)
        g = os.walk(dir_name)
        for i in g:
            for k in i[-1]:
                file_path = ‘%s/%s‘%(i[0], k)
                target.send(file_path)

@init
def opener(target):
    ‘打开文件获取文件句炳‘
    while True:
        file_path = yield
        print(‘车间opener开始生产产品：文件句柄‘)
        time.sleep(0.2)
        with open(file_path) as f:        #opener的参数是cat的运行结果
            target.send((file_path, f))   #下一个阶段的生成器.send 传送
@init
def cat(target):
    ‘读取文件内容‘
    while True:
        file_path,f = yield
        print(‘车间cat开始生产产品：文件的一行内容‘)
        time.sleep(0.2)
        for line in f:
            target.send((file_path,line))   #send可以传送多个值，但必须元组类型
@init
def grep(pattern, target):  #patten传的参数
    ‘过滤一行内容有无关键需要的关键字‘
    while True:
        file_path,line = yield
        print(‘车间grep开始生产产品：包含python这一行文件的绝对路径‘)
        time.sleep(0.2)
        if pattern in line:
            target.send(file_path)
@init
def printer():
    ‘打印文件路径‘
    while True:
        file_path = yield
        print(‘车间printer开始生产产品：得到最终的产品‘)
        time.sleep(0.2)
        print(file_path)


g = search(opener(cat(grep(‘python‘,printer()))))
g.send(‘C:\\egon‘)