Python－if-elif-else语句.pdf

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Python-if-elif-else语句
分类: Script 2010-12-09 15:40 5358人阅读评论(0) 收藏举报
Source:
#!/bin/env python # coding=gb2312 # -*- coding: gb2312 -*- from __future__ import division #### if-
else #### print '#### if-else ####' a = input("a: ") # 12 or 10+2 b = input("b: ") if(a>b): print
"max: ", a else: print "max: ", b #### if-elif-else #### print '#### if-elif-else ####' score =
raw_input("score: ") # string score = int(score) if(score>=90) and (score<=100): print "A"
elif(score>=80 and score<90): print "B" elif(score>=60 and score<80): print "C" else: print "D" ####
switch I #### print '#### switch ####' x = 1 y = 2 operator = "/" result = { "+": x+y, "-": x-y, "*":
x*y, "/": x/y } print (operator) #### switch II #### print '#### switch II ####' class
switch(object): def __init__(self, value): # init value = value = False # no
break, then fall=False def __iter__(self): yield # match method to create raise
StopIteration # exception to check loop def match(self, *args): if or not args: return True
elif in args: # essful = True return True else: # fail return False operator
= "+" x = 1 y = 2 for case in switch(operator): if case('+'): print x+y break if case('-'): print x-y
break if case('*'): print x*y break if case('