Question

我有以下代码：

import random
import operator

operators={"+":operator.add,
           "-":operator.sub,
           "X":operator.mul}

name = input(" What is Your Name ? :")
score = 0
counter = 1

for question in range(0,10):
    num1 = random.randint(1,13)
    num2 = random.randint(1,13)
    ranop = random.choice(operators)
    answer = operators.get(ranop,num1,num2)#operator searches in operators(DICTIONARY) for random operator and then use num1 and num2 to create a question
    print("{0} {1} {2}=".format(num1,ranop,num2))
    if guess==answer:
          print("✔")
    else:
        print("✘,The answer was {0}".format(answer))
print ("{0}, You Finished! You got {1}/10".format(name.title(),score))

我无法找到发生以下错误的原因：

What is Your Name ? :s
Traceback (most recent call last):
  File "substr.py", line 15, in <module>
    ranop = random.choice(operators)
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/random.py", line 254, in choice
    return seq[i]
KeyError: 0

Answer 1

random.choice需要sequence type，例如tuple或list。将random.choice(operators)更改为random.choice(list(operators))应修复此特定问题，但我仍然不知道您尝试使用此代码执行的操作。

Answer 2

您有以下错误：

ranop = random.choice(operators) # choice takes a sequence, not a dictionary.
answer = operators.get(ranop,num1,num2)
# In your case, get takes a single argument.  It returns a function, which you apply to the numbers.
guess == answer # You never define guess.

它现在应该运行，但您可能希望在某个时刻增加score。

Python随机选择数学任务（代码整数消息）

2 个答案: