Python Parking Lot Management Application – Project Structure and Core Code

Project Structure

The project consists of several folders and files:

datefile : stores the Excel file with vehicle information.

file : contains image assets. ic_launcher.jpg is the window’s top‑right icon, income.png is a bar chart for revenue statistics, key.txt holds the API key for Baidu image‑recognition, and test.jpg stores pictures captured from the camera.

venv : the virtual environment with required Python modules.

btn.py : button module.

main.py : main program file.

ocrutil.py : license‑plate recognition module.

timeutil.py : time‑handling utilities.

Main Code

<code># 车位文字
def text1(screen):
    # 剩余车位
    k = Total - carn
    if k < 10:
        # 剩余车位
        sk = '0' + str(k)
    else:
        sk = str(k)
    # 使用系统字体
    xtfont = pygame.font.SysFont('SimHei', 20)
    # 重新开始按钮
    textstart = xtfont.render('共有车位：' + str(Total) + '  剩余车位：' + sk, True, WHITE)
    # 获取文字图像位置
    text_rect = textstart.get_rect()
    # 设置文字图像中心点
    text_rect.centerx = 820
    text_rect.centery = 30
    # 绘制内容
    screen.blit(textstart, text_rect)

# 停车场信息表头
def text2(screen):
    # 使用系统字体
    xtfont = pygame.font.SysFont('SimHei', 15)
    # 重新开始按钮
    textstart = xtfont.render('  车号       时间    ', True, WHITE)
    # 获取文字图像位置
    text_rect = textstart.get_rect()
    # 设置文字图像中心点
    text_rect.centerx = 820
    text_rect.centery = 70
    # 绘制内容
    screen.blit(textstart, text_rect)
    pass

# 停车场车辆信息
def text3(screen):
    # 使用系统字体
    xtfont = pygame.font.SysFont('SimHei', 12)
    # 获取文档表信息
    cars = pi_table[['carnumber', 'date', 'state']].values
    # 页面就绘制10辆车信息
    if len(cars) > 10:
        cars = pd.read_excel(path + '停车场车辆表.xlsx', skiprows=len(cars) - 10, sheet_name='data').values
    # 动态绘制y点变量
    n = 0
    # 循环文档信息
    for car in cars:
        n += 1
        # 车辆车号 车辆进入时间
        textstart = xtfont.render(str(car[0]) + '   ' + str(car[1]), True, WHITE)
        # 获取文字图像位置
        text_rect = textstart.get_rect()
        # 设置文字图像中心点
        text_rect.centerx = 820
        text_rect.centery = 70 + 20 * n
        # 绘制内容
        screen.blit(textstart, text_rect)
    pass</code>

Implementation Effect

The application displays the total number of parking spaces, remaining spaces, and a list of vehicles with their entry times, as shown in the screenshots below.

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