comefrom: <qiyuangong>422_Valid_Word_Square_1.py
code: def validWordSquare( words):
      if words is None or len(words) == 0:
          return True
      ls = len(words)
      for i in range(ls):
          for j in range(1, len(words[i])):
              if j >= ls:
                  return False
              if i >= len(words[j]):
                  return False
              if words[i][j] != words[j][i]:
                  return False
      return True
masked: def sample_funcname ( var_0 ) :
      if var_0 is None or len ( var_0 ) == 0 :
          return True
      var_5 = len ( var_0 )
      for var_7 in range ( var_5 ) :
          for var_9 in range ( 1 , len ( var_0 [ var_7 ] ) ) :
              if var_9 >= var_5 :
                  return False
              if var_7 >= len ( var_0 [ var_9 ] ) :
                  return False
              if var_0 [ var_7 ] [ var_9 ] != var_0 [ var_9 ] [ var_7 ] :
                  return False
      return True
  