python - 如何知道在python中为不同的属性分配相同的值哪个更有优势

Question

在 python 中，两者之间哪个更快，更有优势

a = b = c = d = 1

和

a = 1
b = 1
c = 1
d = 1

Answer 1

简单地运行一个测试:

>>> import timeit
>>> min(timeit.repeat('a = b = c = d = 1', number=10000000))
0.4885740280151367
>>> min(timeit.repeat('a = 1; b = 1; c = 1; d = 1', number=10000000))
0.6283371448516846

另请注意:

>>> min(timeit.repeat('a, b, c, d = 1, 1, 1, 1', number=10000000))
0.4040501117706299