请问怎么改啊

[yhy3638]

from string import lower
from operator import add,sub,mul
from random import randint,choice
ops={'+':add,'-':sub,'*':mul}
MAXTRIES=2
def doprob():
op=choice('+ - *')
nums=[randint(1,10),randint(1,10)]
nums.sort();nums.reverse()
ans=apply(ops[op],nums)
pr='%d%s%s='%(nums[0],op,nums[1])
oops=0
while 1:
try:
if int(raw_input(pr))==ans:
print'correct'
break
if oops==MAXTRIES:
print 'sorry...the answer is \n%s%d'%(pr,ans)
else:
print'incorrect...try again'
oops=oops+1
except(KeyboardInterrupt,EOFError,
ValueError),diag:
print'invalid input...try again'
def main():
while 1:
doprob()
try:
opt=lower(law_input('Try another?([y]/n)'))
except(KeyboardInterrupt,EOFError):
print;break
if opt and opt[0]=='n':
break
if _name_== '_main_':
main()



Traceback (most recent call last):
File "D:/wayne/python/Lib/test.py", line 35, in <module>
if _name_== '_main_':
NameError: name '_name_' is not defined
请问怎么改啊

[king6o60]

不知道你哪copy来的。记住是双下滑
if __name__ == "__main__":

[lixq2000]

同上

[yhy3638]

我是菜鸟阿。原来是这样还是有错误的

[king6o60]

修改之处共3个，第一个，双下滑，1楼时候我说过了。
第二个。op=choice('+-*')，而不是op=choice('+ - *')，这样它连空格都有可能会随机选到
第三个。raw_input而不是law_input

#!/usr/local/bin/python
# -*- encoding:utf-8 -*-
from string import lower
from operator import add,sub,mul
from random import randint,choice
ops={'+':add,'-':sub,'*':mul}
MAXTRIES=2
def doprob():
    op=choice('+-*')   ##here
    nums=[randint(1,10),randint(1,10)]
    nums.sort();nums.reverse()
    ans=apply(ops[op],nums)
    pr='%d%s%s='%(nums[0],op,nums[1])
    oops=0
    while 1:
        try:
            if int(raw_input(pr))==ans:
                print'correct'
                break 
            if oops==MAXTRIES: 
                print 'sorry...the answer is \n%s%d'%(pr,ans)
            else: 
                print'incorrect...try again'
                oops=oops+1  
        except(KeyboardInterrupt,EOFError,
                  ValueError),diag: 
                print'invalid input...try again'
def main():
    while 1:  
        doprob()  
        try:
          opt=lower(raw_input('Try another?([y]/n)')) ##here
        except(KeyboardInterrupt,EOFError):
            print;break 
        if opt and opt[0]=='n': 
            break  
if __name__== '__main__': ##here
    main() 

[qap22]

不懂，up

[skyccm]

from string import lower
from operator import add,sub,mul
from random import randint,choice
ops={'+':add,'-':sub,'*':mul}
MAXTRIES=2
def doprob():
op=choice('+ - *')
nums=[randint(1,10),randint(1,10)]
nums.sort();nums.reverse()
ans=apply(ops[op],nums)
pr='%d%s%s='%(nums[0],op,nums[1])
oops=0
while 1:
try:
if int(raw_input(pr))==ans:
print'correct'
break
if oops==MAXTRIES:
print 'sorry...the answer is \n%s%d'%(pr,ans)
else:
print'incorrect...try again:'
oops=oops+1
except(KeyboardInterrupt,EOFError,
ValueError),diag:
print'invalid input...try again'
def main():
while 1:
doprob()
try:
opt=lower(raw_input('Try another?([y]/n)'))
if opt and opt[0]=='n':
break
except(KeyboardInterrupt,EOFError):
print;break

if __name__=='__main__':

main()

把你的代码执行一下，修改基本上都是和4楼的大同小异。4楼说了，我不必再说；