input: 
  def print_star_pattern() -> None:
      """Print a specific star pattern.
      The pattern consists of two parts:
      1. For i from 0 to 4, print i+1 stars on each line.
      2. For i from 5 to 1, print i stars on each line.
  
      >>> print_star_pattern()
      *
      **
      ***
      ****
      *****
      ****
      ***
      **
      *
      """
  
output:     for i in range(5):
          print('*' * (i + 1))
      for i in range(5, 0, -1):
          print('*' * i)