编写一个 Python 程序，使用 while 循环打印以下形状： ***** ***** ***** ***** 要求： 使用 while 循环来实现打印过程。 每行打印的星号数量和空格数量相等。 形状呈现出向右对齐的效果。

可以使用以下代码实现：

i = 1
while i <= 4:
    print(" "*(4-i) + "*"*i + "*"*(i-1))
    i += 1

这里使用了一个 while 循环，循环变量 i 从 1 到 4，每次循环打印一行星号。在每一行中，先打印一定数量的空格，使得星号呈现向右对齐的效果，然后打印一定数量的星号。注意，每行打印的星号数量和空格数量相等，因此第 i 行需要打印 i 个星号和 4-i 个空格。

相关问题

、 编写一个 Python 程序，使用 while 循环打印以下形状： ***** ***** ***** *****

可以使用以下代码实现：

i = 1
while i <= 4:
    print(" "*(4-i) + "*"*5)
    i += 1

这个程序使用了一个 while 循环，循环变量 i 从 1 开始，每次循环加 1，直到 i 大于 4 时退出循环。在循环体中，使用字符串的乘法运算符 * 来打印星号，使用字符串的加法运算符 + 来打印空格。其中，空格的数量是 4 减去 i，星号的数量是 5。这样就可以打印出上述形状。

帮我用Python语言编写一个最简洁的俄罗斯方块程序

抱歉，我是一个语言模型，无法编写和运行代码。但是，以下是一个简单的俄罗斯方块程序的代码示例，您可以参考并尝试自己编写。

import pygame
import random

pygame.init()

# 定义窗口大小和方块大小
window_width = 300
window_height = 600
block_size = 30

# 定义颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
green = (0, 255, 0)
blue = (0, 0, 255)
yellow = (255, 255, 0)

# 初始化窗口
window = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption('俄罗斯方块')

# 定义方块形状
shapes = [
    [[1, 1, 1], [0, 1, 0]],
    [[1, 1, 0], [0, 1, 1]],
    [[0, 1, 1], [1, 1, 0]],
    [[1, 1], [1, 1]],
    [[1, 0, 0], [1, 1, 1]],
    [[0, 0, 1], [1, 1, 1]],
    [[1, 0], [1, 1]],
]

# 随机生成一个方块
def new_block():
    shape = random.choice(shapes)
    color = random.choice([red, green, blue, yellow])
    block = {'shape': shape, 'color': color, 'x': window_width // 2, 'y': 0}
    return block

# 检查方块是否越界或与其他方块重叠
def is_valid_position(board, block):
    for x in range(len(block['shape'][0])):
        for y in range(len(block['shape'])):
            if block['shape'][y][x] == 1:
                if x + block['x'] < 0 or x + block['x'] >= len(board[0]) or y + block['y'] >= len(board):
                    return False
                if board[y + block['y']][x + block['x']] != black:
                    return False
    return True

# 将方块放入游戏板中
def add_to_board(board, block):
    for x in range(len(block['shape'][0])):
        for y in range(len(block['shape'])):
            if block['shape'][y][x] == 1:
                board[y + block['y']][x + block['x']] = block['color']

# 从游戏板中移除已满的行
def remove_complete_rows(board):
    num_complete_rows = 0
    y = len(board) - 1
    while y >= 0:
        row_complete = True
        for x in range(len(board[y])):
            if board[y][x] == black:
                row_complete = False
        if row_complete:
            num_complete_rows += 1
            for y2 in range(y, 0, -1):
                for x in range(len(board[y2])):
                    board[y2][x] = board[y2 - 1][x]
            for x in range(len(board[0])):
                board[0][x] = black
        else:
            y -= 1
    return num_complete_rows

# 画游戏板和方块
def draw_board(board, block):
    for x in range(len(board[0])):
        for y in range(len(board)):
            pygame.draw.rect(window, board[y][x], (x * block_size, y * block_size, block_size, block_size))
    for x in range(len(block['shape'][0])):
        for y in range(len(block['shape'])):
            if block['shape'][y][x] == 1:
                pygame.draw.rect(window, block['color'], ((x + block['x']) * block_size, (y + block['y']) * block_size, block_size, block_size))

# 主循环
def main():
    board = [[black for x in range(window_width // block_size)] for y in range(window_height // block_size)]
    block = new_block()
    clock = pygame.time.Clock()
    fall_time = 0
    fall_speed = 0.5
    score = 0
    game_over = False

    while not game_over:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    block['x'] -= 1
                    if not is_valid_position(board, block):
                        block['x'] += 1
                elif event.key == pygame.K_RIGHT:
                    block['x'] += 1
                    if not is_valid_position(board, block):
                        block['x'] -= 1
                elif event.key == pygame.K_UP:
                    block['shape'] = [list(reversed(x)) for x in zip(*block['shape'])]
                    if not is_valid_position(board, block):
                        block['shape'] = [list(reversed(x)) for x in zip(*block['shape'])]
                elif event.key == pygame.K_DOWN:
                    block['y'] += 1
                    if not is_valid_position(board, block):
                        block['y'] -= 1

        if is_valid_position(board, block):
            block['y'] += 1
        else:
            add_to_board(board, block)
            score += remove_complete_rows(board)
            block = new_block()

        fall_time += clock.get_rawtime()
        clock.tick()
        if fall_time / 1000 >= fall_speed:
            block['y'] += 1
            fall_time = 0

        window.fill(white)
        draw_board(board, block)

        pygame.display.set_caption('俄罗斯方块 | 得分: {}'.format(score))
        pygame.display.update()

        if not is_valid_position(board, block):
            game_over = True

    pygame.quit()

if __name__ == '__main__':
    main()