[FIXED] python find function always gives -1 with .upper()

Issue

I was trying to write a parsing routine and use the find function. But it always gives me a -1 no matter what I search for.

doc_list = ["The Learn Python Challenge Casino.", "They bought a car", "Casinoville"]

for word in doc_list:
    word.upper()
    word.find("A")

Output:

'THE LEARN PYTHON CHALLENGE CASINO.'
-1
'THEY BOUGHT A CAR'
-1
'CASINOVILLE'
-1

Solution

.upper() does not modify the string, it returns a new string.

Use it like this instead:

for word in doc_list:
  print(word.upper().find('A'))

Output:

6
12
1

Answered By - Stef