Python__面向過程編程

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面向過程：核心是面向過程，過程即解決問題的步驟，基於面向過程去設計程式，就像是在設計流水線

#優點：程式結構清晰，可以把複雜的問題簡單化，流程化
#缺點：可擴充性差，一條流水線只是用來解決一個問題
os模組功能展示：

#Author wangmengzhu#裝飾器def init(func):    def wrapper(*args,**kwargs):        g = func(*args,**kwargs)        next(g)        return g    return wrapper#第一階段，找到所有檔案的絕對路徑import os@initdef search(target):    while True:        filepath = yield        g = os.walk(filepath)        for dirpath,_,files in g:            for file in files:                abspath = r‘%s\%s‘%(dirpath,file)                target.send(abspath)#第二階段，開啟檔案@initdef opener(target):    while True:        abspath = yield        with open(abspath) as f:            target.send((abspath,f))#第三階段，迴圈讀出每一行的內容@initdef cat(target):    while True:        abspath,f = yield        for line in f:            res = target.send((line,abspath))            if res:                break#第四階段，過濾@initdef grep(pattern,target):    tag = False    while True:        line,abspath = yield tag        tag = False        if pattern in line:            target.send(abspath)            tag = True#第五階段@initdef printer():    while True:        abspath = yield        print(abspath)g = search(opener(cat(grep(‘error‘,printer()))))g.send(r‘C:\Users\wangmengzhu\PycharmProjects\MZ\a‘)

 

Python__面向過程編程