Python Parking Lot Management System – Project Structure and Core Code

Recently I revisited a small Python project I had practiced earlier, documenting its structure and core implementation.

Project Structure

datefile folder: stores the vehicle information Excel file.

file folder: contains image assets – ic_launcher.jpg (window icon), income.png (bar chart for revenue), key.txt (Baidu image‑recognition API key), test.jpg (camera‑captured image).

venv folder: virtual environment with required Python packages.

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):
    xtfont = pygame.font.SysFont('SimHei', 15)
    textstart = xtfont.render('  车号       时间    ', True, WHITE)
    text_rect = textstart.get_rect()
    text_rect.centerx = 820
    text_rect.centery = 70
    screen.blit(textstart, text_rect)
    pass

# 停车场车辆信息
def text3(screen):
    xtfont = pygame.font.SysFont('SimHei', 12)
    cars = pi_table[['carnumber','date','state']].values
    if len(cars) > 10:
        cars = pd.read_excel(path + '停车场车辆表.xlsx', skiprows=len(cars) - 10, sheet_name='data').values
    n = 0
    for car in cars:
        n += 1
        textstart = xtfont.render(str(car[0]) + '   ' + str(car[1]), True, WHITE)
        text_rect = textstart.get_rect()
        text_rect.centerx = 820
        text_rect.centery = 70 + 20 * n
        screen.blit(textstart, text_rect)
    pass</code>

Result

The application displays the total number of parking spaces, remaining slots, and a scrolling list of vehicle numbers with entry times, updating dynamically as cars enter or leave.

Below is a screenshot of the final UI: