Any suggestions on how to do that in Python?
有关如何在Python中执行此操作的任何建议？
if x():
a = 20
b = 10
else:
a = 10
b = 20
I can swap them as below, but it's not as clear (nor very pythonic IMO)
我可以如下交换它们，但它不是那么清楚（也不是非常pythonic的IMO）
a = 10
b = 20
if x():
[a, b] = [b, a]
2 个解决方案
#1
11
(a,b) = (20,10) if x() else (10,20)
#2
5
Swapping values with a, b = b, a is considered idiomatic in Python.
使用a，b = b，a交换值在Python中被认为是惯用的。
a, b = 10, 20
if x(): a, b = b, a
One nice thing is about this is you do not repeat the 10 and 20, so it is a little DRY-er.
一个好处是关于这是你不重复10和20，所以这是一个小干。
#1
11
(a,b) = (20,10) if x() else (10,20)
#2
5
Swapping values with a, b = b, a is considered idiomatic in Python.
使用a，b = b，a交换值在Python中被认为是惯用的。
a, b = 10, 20
if x(): a, b = b, a
One nice thing is about this is you do not repeat the 10 and 20, so it is a little DRY-er.
一个好处是关于这是你不重复10和20，所以这是一个小干。