I ran into something really strange, a loop without while

This is my function, and the game_lexicon is a dict from a different file,  Not sure why it is looping.  It will make the tuple list, run all the stuff, and then start over asking for a user input. It runs a second time, overwrites previous info and then shuts down.

I'll update when I figure out what the hell happened.  I didn't think a loop was possible without a 'while'

Update:  
The error was in my game_lexicon import.  I had the same scan function running in that file, so it was running twice.  There was no loop.

from lexicon import game_lexicon

def scan(some_dict):

tuple_list = []

try:

user_input = input(" give me a sentence...>")

user_words = user_input.split()

print(user_words)

except:

print("input not tested.")

for word in user_words:

key = word

print(key)

success =False

try:

int(word) == word

#print(f"the integer {word} is accepted.")

tuple_list.append(('number', word))

success = True

except ValueError:

for key in some_dict:

val = some_dict.get(key)

if word in val:

#print(f"word {word} FOUND!")

#print(f"{word} was found in {key} list")

tuple_list.append((key, word))

success = True

else:

print(f"word not found in {key}")

# i need a way to create tuples of errors that are not found in the lexicon

finally:

if not success:

tuple_list.append(('error', word))

else:

print("This word added to tuple list.")

print(tuple_list)

#scan(game_lexicon)