I have the following code:

```
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))

```

I can't find why the following error occurs:

```none
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

```