File "<string>", line 19, in <module> error is related to what?

[Frankduc]

To say i tripled check and more to see if there was mistyping.

Its not this code it is the one provided by menator:

str_len = len(max(p)[0])
  
for (ticker, shares) in p:
    if len(ticker) < str_len:
        spacer = ' '*(str_len - len(ticker) + 2)
    else:
        spacer = ' '*2
    print(f'{ticker} {spacer} {shares}')

str is for string and len is for length (maximum(p)) Whatever i thought it was his solution to solve the mystery behind the absence of output and error returned.
When actually it is just a way to create a space between the porfolio stocks and prices in the output.
Sometimes i can be dense!

Thanks dean