程序设计与数据结构

同学笔记

• 

  Infiltrator_roam 2021-01-08 18:40:02

  来源：看Python如何灵活应用经典设计模式-3 查看详情

  from functools import reduce
  DICT = {'0':0,'1':1,'2':2,'3':3,'4':4,'5':5,'6':6,'7':7,'8':8,'9':9,}
  def str_int(s):
      def num(s):
          return DICT[s]
      return reduce(lambda x,y:x*10+y,map(num,s))

• 

  Infiltrator_roam 2021-01-08 16:08:44

  来源：看Python如何灵活应用经典设计模式-2 查看详情

  #把列表的元素转换成字符串
  l = [1,2,3,4,5,6,7,9]
  print(list(map(str,l)))

  l = [1,2,3,4,5]
  def f(x,y):
      return x * 10 + y
  from functools import reduce
  i = reduce(f,l)
  print(i)

• 

  Infiltrator_roam 2021-01-08 13:04:51

  来源：Python的魔法功能，魅力之所在，让代码量更少 -2 查看详情

  import sys
  def test(x):
      n = 0
      m = [1]
      while n < x:
          n += 1
          yield m
          m = [1] + [m[k] + m[k+1] for k in range(len(m)-1)] + [1]
  l = test(5)
  for s in l:
      print(s)

没有更多了