I am getting this value error?

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Python3.6

I am getting a value error :

Traceback (most recent call last):
File "C:\Users\Ubaid Parveez\Documents\Python\Arguments.py", line 18, in <module>
script, user_name = argv
ValueError: not enough values to unpack (expected 2, got 1)

What I have tried:

from sys import argv

script, user_name = argv

prompt = '>'

print(f"Hi {user_name}, I'm the {script} script.")
print("I,d like to ask you a few questions")
print(f"Do you like me {user_name} ? ")

likes = input(prompt)

print(f"Where do you live {user_name} ")
lives = input(prompt)

print(f"What kind of computer you have?")
computer = input(prompt)

print (f"Alright, so you said {likes} about liking me. \n You live in {lives} . Not sure where that is \n And you have a {computer} ")