comefrom: <qiyuangong>091_Decode_Ways_1.py
code: def numDecodings( s):
      ls = len(s)
      if ls == 0:
          return 0
      dp = [0] * ls
      for index in range(ls):
          if index >= 1 and int(s[index - 1:index + 1]) < 27 and int(s[index - 1:index + 1]) >= 10:
              if index == 1:
                  dp[index] = 1
              else:
                  dp[index] += dp[index - 2]
          if int(s[index]) != 0:
              if index == 0:
                  dp[index] = 1
              else:
                  dp[index] += dp[index - 1]
      return dp[ls - 1]
masked: def sample_funcname ( var_0 ) :
      var_2 = len ( var_0 )
      if var_2 == 0 :
          return 0
      var_4 = [ 0 ] * var_2
      for var_6 in range ( var_2 ) :
          if var_6 >= 1 and int ( var_0 [ var_6 - 1 : var_6 + 1 ] ) < 27 and int ( var_0 [ var_6 - 1 : var_6 + 1 ] ) >= 10 :
              if var_6 == 1 :
                  var_4 [ var_6 ] = 1
              else :
                  var_4 [ var_6 ] += var_4 [ var_6 - 2 ]
          if int ( var_0 [ var_6 ] ) != 0 :
              if var_6 == 0 :
                  var_4 [ var_6 ] = 1
              else :
                  var_4 [ var_6 ] += var_4 [ var_6 - 1 ]
      return var_4 [ var_2 - 1 ]
  