_output_file_name = f'user_followers_ids {screen_name} {datetime.date.today()}.txt'
_output_file_path = os.path.join(PATH_TO_APP_DATA, _output_file_name)
for page in tweepy.Cursor(_api.followers_ids, screen_name=screen_name).pages():
_output_file: TextIO
with open(_output_file_path, 'w') as _output_file:
for item in page:
_output_file.write(f'{item}\n')
# For testing
with open(_output_file_path, 'r') as _output_file:
num_lines: int = 0
for line in _output_file.read().splitlines():