iter = zip('abcd', range(4)) 
  d = dict(iter)
  print(d)
  # {'a': 0, 'b': 1, 'c': 2, 'd': 3}

  Tsign = 'ok ' if True else 'ko'
  Fsign = 'ok' if False else 'ko'
  print(f'Tsign:{Tsign}; Fsign:{Fsign}')
  # Tsign:ok ; Fsign:ko

  {x:y for x in 'abcd' for y in range(4)}
  # {'a': 3, 'b': 3, 'c': 3, 'd': 3}
  [i for i in 'abcd']
  #['a', 'b', 'c', 'd']

  [ x for x in range(10) if x%2==0 ]
  # [0, 2, 4, 6, 8]
  [ x for x in range(30) if x%2==0 and x%3==0 ]
  # [0, 6, 12, 18, 24]
  [ x+1 if x >= 5 else x*5 for x in range(10)]
  # [0, 5, 10, 15, 20, 6, 7, 8, 9, 10]
  l = [[1,2],[3,4],[5,6]]
  [ y for x in l for y in x]
  # [1, 2, 3, 4, 5, 6]

import heapq
nums = [ 1,3,2,5,4,9,0,8]
# 取值前三大的元素
heapq.nlargest(3, nums)
# 取前三小的元素
heapq.nsmallest(3, nums)
# 函数原型： heapq.nlargest(3, nums, key=lambda x: x)
# 函数原型： heapq.nsmallest(3, nums, key=lambda x: x)

  nums = [ 1,3,2,5,4,9,0,8]
  list(filter(lambda x: x>5, nums))
  # [9, 8]