comefrom: <qiyuangong>709_To_Lower_Case_1.py
code: def toLowerCase( str):
      res = []
      gap = ord('a') - ord('A')
      for c in str:
          if ord(c) >= ord('A') and ord(c) <= ord('Z'):
              res.append(chr(ord(c) + gap))
          else:
              res.append(c)
      return ''.join(res)
masked: def sample_funcname ( var_0 ) :
      var_1 = [ ]
      var_5 = ord ( 'a' ) - ord ( 'A' )
      for var_6 in var_0 :
          if ord ( var_6 ) >= ord ( 'A' ) and ord ( var_6 ) <= ord ( 'Z' ) :
              var_1.append ( chr ( ord ( var_6 ) + var_5 ) )
          else :
              var_1.append ( var_6 )
      return ''.join ( var_1 )
  