高级推导式

Python 工具箱

Hugo Bowne-Anderson

Data Scientist at DataCamp

推导式中的条件

可迭代对象上的条件

[num ** 2 for num in range(10) if num % 2 == 0]

[0, 4, 16, 36, 64]

5 % 2

6 % 2

[num ** 2 if num % 2 == 0 else 0 for num in range(10)]

[0, 0, 4, 0, 16, 0, 36, 0, 64, 0]

pos_neg = {num: -num for num in range(9)}

print(pos_neg)

{0: 0, 1: -1, 2: -2, 3: -3, 4: -4, 5: -5, 6: -6, 7: -7, 8: -8}

print(type(pos_neg))

<class 'dict'>

Python 工具箱