code: def version_cmp(version_a, version_b):
      
      a = normalize_version(version_a)
      b = normalize_version(version_b)
  
      i_a = a[0] * 100 + a[1] * 10 + a[0] * 1
      i_b = b[0] * 100 + b[1] * 10 + b[0] * 1
  
      return i_a - i_b
docs: Compares two versions