input: from typing import List
  
  def print_pattern() -> None:
      """ Prints a pattern where each row is a sequence of numbers from 1 up to the row number.
      >>> print_pattern() # doctest: +NORMALIZE_WHITESPACE
      1
      12
      123
      1234
      12345
      """
  
output:     for i in range(1, 6):
          print(''.join(str(j) for j in range(1, i + 1)))