Code to make the minecraft in python with ursina engine:

from ursina import *
from ursina.prefabs.first_person_controller import FirstPersonController

app = Ursina()
grass_texture = load_texture('assets/grass_block.png')
stone_texture = load_texture('assets/stone_block.png')
brick_texture = load_texture('assets/brick_block.png')
dirt_texture  = load_texture('assets/dirt_block.png')
sky_texture   = load_texture('assets/skybox.png')
arm_texture   = load_texture('assets/arm_texture.png')
punch_sound   = Audio('assets/punch_sound',loop = False, autoplay = False)
block_pick = 1

window.fps_counter.enabled = False
window.exit_button.visible = False

def update():
    global block_pick

    if held_keys['left mouse'] or held_keys['right mouse']:
        hand.active()
    else:
        hand.passive()

    if held_keys['1']: block_pick = 1
    if held_keys['2']: block_pick = 2
    if held_keys['3']: block_pick = 3
    if held_keys['4']: block_pick = 4

class Voxel(Button):
    def __init__(self, position = (0,0,0), texture = grass_texture):
        super().__init__(
            parent = scene,
            position = position,
            model = 'assets/block',
            origin_y = 0.5,
            texture = texture,
            color = color.color(0,0,random.uniform(0.9,1)),
            scale = 0.5)

    def input(self,key):
        if self.hovered:
            if key == 'left mouse down':
                punch_sound.play()
                if block_pick == 1: voxel = Voxel(position = self.position + mouse.normal, texture = grass_texture)
                if block_pick == 2: voxel = Voxel(position = self.position + mouse.normal, texture = stone_texture)
                if block_pick == 3: voxel = Voxel(position = self.position + mouse.normal, texture = brick_texture)
                if block_pick == 4: voxel = Voxel(position = self.position + mouse.normal, texture = dirt_texture)

            if key == 'right mouse down':
                punch_sound.play()
                destroy(self)

class Sky(Entity):
    def __init__(self):
        super().__init__(
            parent = scene,
            model = 'sphere',
            texture = sky_texture,
            scale = 150,
            double_sided = True)

class Hand(Entity):
    def __init__(self):
        super().__init__(
            parent = camera.ui,
            model = 'assets/arm',
            texture = arm_texture,
            scale = 0.2,
            rotation = Vec3(150,-10,0),
            position = Vec2(0.4,-0.6))

    def active(self):
        self.position = Vec2(0.3,-0.5)

    def passive(self):
        self.position = Vec2(0.4,-0.6)

for z in range(45):
    for x in range(45):
        voxel = Voxel(position = (x,0,z))

def input(key):
  if key == 'q':
    quit()


window.fullscreen = True
player = FirstPersonController()
sky = Sky()
hand = Hand()

app.run()