Player not falling when it is not colliding with platform Pygame

So I'm making this 2D game in pygame and I have run with an issue were when I try to leap off a platform, my player will just float instead of fall https://gyazo.com/82e9029b230326f182067a9f4a3cc47c. I been trying to use true and false statements to make it work, but most of the time my player will not move at all also I have tried telling it if its not colliding with the platform and that dose not work to.

This is one of the things I have tried

for Platform in platforms:
        if not playerman.rect.colliderect(Platform.rect):
            playerman.y -= playerman.speed

a demo of my game

import pygame
pygame.init()


# width and height of winddow
window = pygame.display.set_mode((700,500))


# window name
pygame.display.set_caption("Game")


#Player class
class Player:
    def __init__(self,x,y,width,height,color):
        self.x = x
        self.y = y
        self.width = width
        self.height = height
        self.color = color
        self.speed = 4
        self.rect = pygame.Rect(x,y,width,height)
    def draw(self):
        self.rect.topleft = (self.x,self.y)
        pygame.draw.rect(window,self.color,self.rect)


class Platform:
    def __init__(self,x,y,width,height,color):
        self.x = x
        self.y = y
        self.width = width
        self.height = height
        self.color = color
        self.rect = pygame.Rect(x,y,width,height)
    def draw(self):
        self.rect.topleft = (self.x,self.y)
        pygame.draw.rect(window,self.color,self.rect)


class Platform2:
    def __init__(self,x,y,width,height,color):
        self.x = x
        self.y = y
        self.width = width
        self.height = height
        self.color = color
        self.rect = pygame.Rect(x,y,width,height)
    def draw(self):
        self.rect.topleft = (self.x,self.y)
        pygame.draw.rect(window,self.color,self.rect)

           
# Colors
white = (255,255,255)
green = (255,0,0)


# class's cordination, size, and color

#Player
playerman = Player(300,250,40,70,white)


#Platform
platform1 = Platform(0,460,800,40,white)
#The top platform
platform2 = Platform2(0,0,800,40,green)


# List's
platforms = [platform1]
platforms2 = [platform2]


# drawing things in main loop
def redraw():
    # background color
    window.fill((0,0,0))


    # drawing the player in main loop
    playerman.draw()


    # Drawing all the bottom platforms in the main loop
    for Platform in platforms:
        Platform.draw()


    # Drawining all the top platforms in the main loop
    for Platform2 in platforms2:
        Platform2.draw()


# Timer for player falling
#fps for the game
fps = 30
clock = pygame.time.Clock()
up = True
down = False
run = True
while run:
    clock.tick(fps)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

            
    keys = pygame.key.get_pressed()
    px,py = playerman.x,playerman.y


    if down == False:
        for Platform in platforms2:
            if keys[pygame.K_SPACE] and playerman.rect.colliderect(Platform):
                up = True

                
    if up:
        playerman.y += 10
        fall = False


    for Platform in platforms:
        if playerman.rect.colliderect(Platform.rect):
            up = False


    if up == False and  keys[pygame.K_SPACE]:
        for Platform in platforms:
            if playerman.rect.colliderect(Platform.rect):
                down = True
                up = False

                
    if down:
        playerman.y -= 10
        playerman.direction = "tjump"
        fall = False


    for Platform in platforms2:
        if playerman.rect.colliderect(Platform.rect):
            down = False
            playerman.direction = "uidle"

   
    if keys[pygame.K_a] and px > playerman.speed:
        for Platform in platforms:
            for Platform2 in platforms2:
                Platform.x += playerman.speed
                Platform2.x += playerman.speed

                    
    elif keys[pygame.K_d] and px < 2000 - playerman.width + playerman.speed:
        for Platform in platforms:
            for Platform2 in platforms2:
                Platform.x -= playerman.speed
                Platform2.x -= playerman.speed
                

    redraw()
    pygame.display.update()
pygame.quit()

from Player not falling when it is not colliding with platform Pygame