Problem with slicing string

[YatishK]

Can you help me figure out what is the issue in the below code.

My Code:

email = input("What is your email add: ")
#UN = email[:email.index("@")]
print(email)

Error:
>>> ================================ RESTART ================================
>>> 
What is your email add: asdasdasdasdasdasd

Error:
Traceback (most recent call last):
  File "C:/Users/ykarkera/Desktop/Python Bible/Strings.py", line 1, in <module>
    email = input("What is your email add: ")
  File "<string>", line 1, in <module>
NameError: name 'asdasdasdasdasdasd' is not defined

>>>