前段时间公司培训一个小题目（很简单），大概要求是读取TXT，按要求的格式，筛选出正确的电话号码，如data.txt中保存了如下的几行
987-123-4567
123 456 7890
(123) 456-7890
现在电话号码格式为：（xxx） xxx-xxxx或xxx-xxx-xxxx，读取TXT输出正确的号码
下面给出两种解法：
#coding=utf-8 import redef setPhoneNumber(): phoneDate=[] listRightFirst=[1,2,3,6,7,8,10,11,12,13] listRightSecond=[0,1,2,4,5,6,8,9,10,11] list_sp = [" ","-","(",")"] i=True j=True phoneLines = open(r"D:eclipse_pythoneclipse_workplace2333srcdata.txt","r") for phoneLine in phoneLines: phoneLine = phoneLine.strip('n') if phoneLine[0] == "(" and phoneLine[4]==")" and phoneLine[5]==" " and phoneLine[9]=="-": for x in listRightFirst: if phoneLine[x] in list_sp : i=False break if i == True: phoneDate.append(phoneLine) if phoneLine[3]=="-" and phoneLine[7]=="-": for y in listRightSecond: if phoneLine[y] in list_sp: j=False break if j==True: phoneDate.append(phoneLine) i=True j=True print phoneDateif __name__=="__main__": setPhoneNumber()题目很简单，代码也很简单，就不解释了。
后面想到已知了格式，为什么不直接正则匹配呢，于是有了如下的代码：
#coding=utf-8 import redef setPhoneNumber(): phoneLines = open(r"D:eclipse_pythoneclipse_workplace2333srcdata.txt","r") for phoneLine in phoneLines: phoneLine = phoneLine.strip('n') if re.findall("(d{3})-(d{3})-(d{4})", phoneLine): print phoneLine if re.findall("((d{3}))s(d{3})-(d{4})", phoneLine): print phoneLineif __name__=="__main__": setPhoneNumber()简单的练习，当做熟悉正则了。