在循环内递增for循环 [英] Incrementing a for loop, inside the loop

问题描述

是否可以在python 3的循环内部增加for循环?

Is it possible to increment a for loop inside of the loop in python 3?

例如:

for i in range(0, len(foo_list)):
    if foo_list[i] < bar
        i += 4

如果条件成立，则循环计数器i在哪里加4，否则它将只增加1(或for循环的步长值是什么)?

Where the loop counter i gets incremented by 4 if the condition holds true, else it will just increment by one (or whatever the step value is for the for loop)?

我知道while循环更适用于这样的应用程序，但是最好知道for循环中的这种(或类似的东西)是否可能.

I know a while loop would be more applicable for an application like this, but it would be good to know if this (or something like this) in a for loop is possible.

谢谢！

推荐答案

您可以使用while循环并根据以下条件递增i:

You could use a while loop and increment i based on the condition:

while i < (len(foo_list)): 
    if foo_list[i] < bar: # if condition is True increment by 4
        i += 4
    else: 
        i += 1 # else just increment 1 by one and check next `foo_list[i]`

使用for循环i将始终返回到范围内的下一个值:

Using a for loop i will always return to the next value in the range:

foo_list = [1,2,3,4,5,6]
bar = 6
for i in range(len(foo_list)):
    print("range i ",i)
    if foo_list[i] < bar:
        i += 4
        print("if i",i)


('range i ', 0)
('if i', 4)
('range i ', 1)
('if i', 5)
('range i ', 2)
('if i', 6)
('range i ', 3)
('if i', 7)
('range i ', 4)
('if i', 8)
('range i ', 5)

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