PYTHON PYGAME: How do I get my player to smoothly jump?

Question

I'm super new to pygame and I'm trying to get my player to jump smoothly but whenever I press space my player teleports to where they should smoothly move to, but the player smoothly falls down according to the gravity I made.

Here's the block of movement code:

        # stop player from falling through the ground
        if player.y > HEIGHT - player.height:
            player.y = HEIGHT - player.height
        
        # gravity
        if player.y != HEIGHT - MAN_HEIGHT:
            player.y += GRAVITY

        # get player to smoothly jump
        if keys_pressed[pygame.K_SPACE]:
            if player.y == HEIGHT - MAN_HEIGHT:
                if player.y != HEIGHT - MAN_HEIGHT - JUMP_HEIGHT:
                    player.y -= JUMP_SPEED

Here's all the code in case

# jump from platform to platform 
# track height
# platform cannot be taller than half-3/4 jump height

import random
import pygame
import time

WIDTH, HEIGHT = 960,  540 # constants used to set pixels for game
STAGE = pygame.display.set_mode((WIDTH,HEIGHT)) # pass tuple as parameters for .setmode
CLOCK = pygame.time.Clock()
FPS = 60

# starting pos this will start us in the middle left of the screen, hince HEIGHT/2 for y
STARTX = WIDTH / 2
STARTY = HEIGHT / 2
# speeds
PLAYER_SPEED = 8 # how many pixels it will move each time the button is pressed every frame
JUMP_SPEED = 10
JUMP_HEIGHT = 250
GRAVITY = 15

MAN = pygame.image.load('man.png')

MAN_HEIGHT = 147

BG = pygame.image.load('bg.png')

def main():
    pygame.init()

    player =MAN.get_rect(center=(STARTX,STARTY))

    keep_playing = True
    while keep_playing:

        CLOCK.tick(FPS)

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                keepPlaying = False

        keys_pressed = pygame.key.get_pressed() #this stores every key on the keyboard in a dictionary and a boolean value in the key that says if its pressed or not

        if keys_pressed[pygame.K_w]:
            player.y -= PLAYER_SPEED

        if keys_pressed[pygame.K_s]:
            player.y += PLAYER_SPEED

        # if player is at screen edge, dont let it go past it 
        if player.y > HEIGHT - player.height:
            player.y = HEIGHT - player.height
        
        # gravity
        if player.y != HEIGHT - MAN_HEIGHT:
            player.y += GRAVITY

        if keys_pressed[pygame.K_SPACE]: # if space pressed
            if player.y == HEIGHT - MAN_HEIGHT:
                if player.y != HEIGHT - MAN_HEIGHT - JUMP_HEIGHT:
                    player.y -= JUMP_SPEED

                    
                    
                
        
        redraw(player)


def redraw(player):
    STAGE.blit(BG, (0,0))
    STAGE.blit(MAN,(STARTX,player.y)) # using player.y will let us move around 

    


    pygame.display.update()

main()

I tried:

if keys_pressed[pygame.K_SPACE]: # if space pressed
            if player.y == HEIGHT - MAN_HEIGHT:
                if player.y != HEIGHT - MAN_HEIGHT - JUMP_HEIGHT:
                    for x in range(10):
                       player.y -= JUMP_SPEED

But this also didn't work.

Also let me know if my code is "ugly" I don't know the conventional methods for making pygame so if I'm making any big mistakes with how I'm doing this please let me know. Thanks!