语法错误它可能是什么？

Question

我一直试图运行这个程序一段时间但我似乎无法找出在尝试运行它时导致错误的原因.

这是我收到错误的代码行:

from math import *
from myro import *
init("simulator")

def rps(score):
    """ Asks the user to input a choice, and randomly assigns a choice to the computer."""
    speak("Rock, Paper, Scissors.")
    computerPick = randint(1,3)
    userPick = raw_input("Please enter (R)ock, (P)aper, or (S)cissors.")
    if userPick = R <#This line is where the error shows up at>
        print "You picked rock."
    elif userPick = P
        print "You picked paper."
    else
        print "You picked Scissors."
    score = outcome(score, userPick, computerPick)
    return score

Answer 1

您正在使用赋值运算符而不是相等.此外,您缺少if语句的冒号而不引用字符串.

if userPick == 'R':
    ...
elif userPick == 'P':
    ...
else:
    ...

我注意到你不应该else在'S'这里使用这个案子. 'S'应该是另一个有效的条件,否则应该是错误状态catchall.

另一种方法是:

input_output_map = {'R' : 'rock', 'P' : 'paper', 'S' : 'scissors'}
try:
    print 'You picked %s.' % input_output_map[user_pick]
except KeyError:
    print 'Invalid selection %s.' % user_pick

要么:

valid_choices = ('rock', 'paper', 'scissors')
for choice in valid_choices:
    if user_choice.lower() in (choice, choice[0]):
        print 'You picked %s.' % choice
        break
else:
    print 'Invalid choice %s.' % user_choice