Python while循环无法正常工作

Question

我在if/else条件中使用while循环。出于某种原因，在一种情况下while循环不起作用。条件显示在我的代码下面。在这些条件下，我会假定应该使用else条件，并且应该减少weight和max_speed，直到while条件不再有效。我究竟做错了什么？

weight = 0 
max_speed = 15 

if weight == 0 and max_speed <= 10: 
    while weight == 0 and max_speed <= 10: 
     weight=weight+1 
     print(weight) 
     print(max_speed) 
else: 
    while weight != 0 and max_speed > 10: 
     weight = weight-1 
     max_speed=max_speed-1 
     print(weight) 
     print(max_speed) 

Answer 1

假设您需要weight=0和max_speed=10;你可以这样做 - >

weight = 0 
max_speed = 15 

while weight !=0 or max_speed > 10: 
    if weight>0: 
     weight = weight-1 
    else: 
     weight = weight+1 
    if max_speed>10: 
     max_speed=max_speed-1 
    print("{} {}".format(weight, max_speed)) 

你的输出看起来像 - >

1 14 
0 13 
1 12 
0 11 
1 10 
0 10 

Answer 2

我想你是or和and之间的混淆。

and表示如果两个条件都满足，则表达式将是True。其中or表示任何条件满足。

现在根据您的代码：

weight = 0 
max_speed = 15 

if weight == 0 and max_speed <= 10: 
    # Goes to else block since max_speed = 15 which is >10 
else: 
    # This while won't be executed since weight = 0 
    while weight != 0 and max_speed > 10: