python pygame sprint

Question

well, i'm probably using it wrong....but
here i'm trying to make my character(char) sprint only when i hold down LSHIFT with RIGHT but when i press it, the speed does increases, but it doesn't goes back to 5 from 10

if keys[pygame.K_RIGHT]:
anim = walk_right[walk]
px += char_speed
walk += 1
if walk >= 9:
walk = 1
if px >= W:
px = 0

if keys[pygame.K_LSHIFT]:
char_speed = 10

if event.type == pygame.KEYUP:
if event.type == pygame.K_LSHIFT:
char_speed = 5

if keys[pygame.K_LEFT]:
anim = walk_left[walk]
px -= char_speed
walk += 1
if walk >= 9:
walk = 0
if px <= 0:
px = W

Answer 1

I think it's just a typo:

if event.key == pygame.K_LSHIFT:
char_speed = 5

Answer 2

No, definitely not a typo-

Answer 3

Ok, you're right, it's not just a typo, if you KEYUP LSHIFT after RIGHT it won't work

So, looking better at your code, there are a couple things you should consider changing:

Chack for event.type == KEYDOWN and than handle each key instead of using the get_pressed() dictionary
(This should solve the problem)

Use a generator to handle the animation, and just use next() or better yet define a class with a walk method and handle the animation there
(this should make the code cleaner)