1 people = 30
2 cars = 40
3 trucks = 15
4
5 if cars > people: # 下面同时为 True， 也只会运行第一个为 True 的块 ，另外两个优先级依次低于if
6 print("We should take the cars.") # 第一个分支的块
7
8 elif cars < people: # 第二个分支
9 print("We should not take the cars.")
10
11 else : # 第三个分支
12 print("We can't decide.")
13
14
15
16 if trucks > cars:
17 print("That's too many trucks.")
18
19 elif trucks < cars:
20 print("Maybe we could take the trucks.")
21
22 else:
23 print("We still can't decide.")
24
25
26
27 if people > trucks:
28 print("Allright,let's just take the trucks.")
29
30 else:
31 print("Fine,let's stay home then.")
PS C:\Users\Administrator\lpthw> python ex30.py
We should take the cars.
Maybe we could take the trucks.
Allright,let's just take the trucks.