变量解包

  1. username = ["zaygee", "hoan"]
  2. a, b = username
  3. print(a, b) # zaygee hoan
  5. vara, varb = 0, ''
  6. print(vara, varb)   # 0,

星号表达式

variables 作为变量名，会贪婪的捕获多个值，并将捕获到的内容作为列表赋值给variables _ 一般用于作为无用占位

  1. # 列表
  2. a, *b, c = [1, 2, 3, 4, 5, 6]
  3. print(a, b, c)  # 1 [2, 3, 4, 5] 6
  5. a, *_ = [1, 2, 3, 4, 5, 6]
  6. print(a)    # 1
  8. # 字典
  9. a, *b, c = {"a": 1, "b": 2, "c": 3, "d": 4}
  10. print(a, b, c)  # a ['b', 'c'] d
  12. # 元祖
  13. a, *b, c = (1, 2, 3, 4, 5)
  14. print(a, b, c)  # 1 [2, 3, 4] 5

布尔值作为整数使用

  1. print(sum([True, True]))    # 2
  2. print(sum([False, False, False]))   # 0