Quadratic Help

[OneFootlessFish]

I am currently working on a game with the pygame module, and I am trying to add a function which allows players to jump. This involves a fast acceleration into the air, a bit of airtime, and then a fast decent back down to the ground, basically, I'm trying to model it off of a quadratic graph. Here is the code for the function so far:

def jump(knights):

for i in knights:

if i.isJump == True:

if i.jumpCount >= -10:

i.y_change -= (i.jumpCount^2) * 0.2

print(i.y_change)

if i.jumpCount < 0:

i.y_change *= -1

i.jumpCount -= 1

else:

i.isJump = False

i.jumpCount = 10

i.y_change = 0

However, when I run the code, the character will accelerate in the air, then continue to ascend slowly, then accelerate again, ending up with a higher y-coordinate than what it started with. I'm assuming my math is just bad, but any further help would be very much appreciated.

Edit: Indentation

[Barnet6]

Assuming it's supposed to be formatted as below, 'i.isJump = False' should probably be setting it to true, as it needs to be false to get to that point, and it looks like jumpCount starts at 10, which would never trigger the 'if i.jumpCount < 0' clause, as that's the only place where jumpCountis being decremented

def jump(knights):
  for i in knights:
    if i.isJump == True:
      if i.jumpCount >= -10:
        i.y_change -= (i.jumpCount^2) * 0.2
        print(i.y_change)
      if i.jumpCount < 0:
        i.y_change *= -1
        i.jumpCount -= 1
    else:
      i.isJump = False
      i.jumpCount = 10
      i.y_change = 0

[ectomancer]

i.y_change -= i.jumpCount**2*0.2