I have an issue. This python program runs in my computer but shows error in solo learn code ground. Help me sort out this

Question

#Python program find numerals in a string and change it with alphabets

sample = input()

def add_string(mystring, position, num_name):
    my_string = my_string[:position] + num_name + my_string[position:]
    return my_string

nums = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
names = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']

for i in range(len(sample)):
    for j in range(len(nums)):
        if sample[i] == nums[j]:
            sample = add_string(sample, i, names[j])

print(sample)

Answer 1

you have copied some non ascii characters in your code.
I cleared them.
- the function parameter mystring is not used in the function definition
should be my_string
* your code still need some tuning. is this a code coach?
https://code.sololearn.com/cqdJ24Wi3svk/?ref=app

Answer 2

the my_string parameter in parenthesis is missing an underscore

Answer 3

Thanks