python加减乘除，格式化字符串

╰半橙微兮° 2022-07-12 07:22 128阅读 0赞

**\#!/usr/bin/python**

num1 = input("Please input a number:")

num2 = input("Please input a number:")

print num1 + num2

print num1 - num2

print num1 \* num2

print num1 / num2

print "%s + %s =  %s" % (num1, num2, num1 + num2)

print "%s - %s =  %s" % (num1, num2, num1 - num2)

print "%s \* %s =  %s" % (num1, num2, num1 \* num2)

print "%s / %s =  %s" % (num1, num2, num1 / num2)

/除

//取整

%取余

\*\*乘方

\#!/usr/bin/env python

from operator import add, sub,mul,div, imod

from random import randint, choice

ops = \{'+': add, '-': sub, '\*': mul, '/': div\}   
ops1 = \{'+': add, '-': sub, '\*': mul\}   
MAXTRIES = 2

def doprob():  
    nums = \[randint(1,10) for i in range(2)\]  
    nums.sort(reverse=True)  
    if  imod(\*nums) == 0:  
        op = choice('+-\*/')  
        ans=ops\[op\](\*nums)  
    else:  
        op = choice('+-\*')  
        ans=ops1\[op\](\*nums)

pr='%d %s %d =' % (nums\[0\],op,nums\[1\])     
    oops = 0   
    while True:  
        try:  
            if int(raw\_input(pr))==ans:  
                print 'correct!'  
                break  
            if oops == MAXTRIES:  
                print 'answer \\n%s%d' %(pr,ans)  
            else:  
                print 'incorrect... try again'    
                oops+=1  
        except(KeyboardInterrupt,EOFError,ValueError):     
             print 'invalid input... try again'

def main():  
    while True:  
        doprob()     
        try:  
            opt = raw\_input('again?\[y\]').lower()     
            if opt and opt\[0\]=='n':  
                break  
        except (KeyboardInterrupt,EOFError):  
            break

if \_\_name\_\_=='\_\_main\_\_':   
    main()