sep-pm-platformer/project/sprite/DynamicSprite.py

import pygame
import sys

from sprite.Sprite import Sprite
from sprite.Spritesheet import Spritesheet
from sprite.StaticSprite import StaticSprite

sys.path.append('./sprite')


class DynamicSprite(StaticSprite):
    def __init__(self, spritesheet: Spritesheet):
        super().__init__(spritesheet)

        self.motion = (0, 0)
        self.deceleration_horizontal = 0
        self.gravity = 9.81 / 10

    def tick(self, dt: float):
        super().tick(dt)

        self.motion = (
            self.motion[0] - self.deceleration_horizontal * dt,
            self.motion[1] + self.gravity * dt
        )