How to write a program in Python and use Baidu Maps API to display real-time traffic conditions on the map?

In modern society, maps have become an integral part of our lives. Whether it is travel navigation or finding surrounding places, maps provide important help. In map applications, real-time traffic information is a very important function. This article will introduce how to use Python to write a program to use Baidu Maps API to display real-time traffic information on the map.

First of all, we need to prepare some necessary materials. First, you need to install a Python development environment. You can choose to download and install the latest Python version from the official website. Secondly, you need to register an account on the Baidu Map Open Platform and obtain the corresponding key in order to use the Baidu Map API.

Next, we need to install some third-party Python libraries for subsequent development. You can use the pip command to install. Open a terminal or command prompt and enter the following commands to install the required libraries:

pip install requests
pip install folium

Next, we can start writing Python programs. The following is a sample program that can obtain real-time traffic information through Baidu Maps API and display it on the map:

import requests
import folium

# 获取百度地图API的密钥
api_key = 'your_api_key'

# 获取实时路况信息
def get_traffic_info(api_key):
    url = f'http://api.map.baidu.com/traffic/v1/road?ak={api_key}&city=北京市'
    response = requests.get(url)
    traffic_info = response.json()
    return traffic_info

# 在地图上显示实时路况
def show_traffic_on_map(traffic_info):
    # 创建地图对象
    map = folium.Map(location=[39.9075, 116.39723], control_scale=True, zoom_start=11)
    
    # 遍历实时路况信息
    for road in traffic_info['roads']:
        polyline = road['polyline']
        status = road['status']
        
        # 根据路况状态选择不同的颜色
        if status == 1:
            color = 'green'
        elif status == 2:
            color = 'yellow'
        elif status == 3:
            color = 'red'
        else:
            color = 'gray'
        
        # 在地图上添加路线
        folium.PolyLine(locations=polyline, color=color, weight=5).add_to(map)
    
    # 保存地图为HTML文件，可在浏览器中打开查看
    map.save('traffic_map.html')
    print('地图已保存为 traffic_map.html')

# 主函数
def main(api_key):
    traffic_info = get_traffic_info(api_key)
    show_traffic_on_map(traffic_info)

if __name__ == '__main__':
    main(api_key)

In the above sample code, we first define a get_traffic_info function to obtain real-time traffic information through Baidu Maps API. Next, we define a show_traffic_on_map function for displaying real-time traffic information on the map. Finally, in main the function, we call these two functions to complete the generation of real-time traffic map.

It should be noted that in this sample program, we only display the real-time traffic information of Beijing. If you want to display the real-time traffic conditions of other cities, you can url modify city the parameters in and pass in the name of the corresponding city.

After running the program, an traffic_map.html HTML file named . Routes in different colors will be displayed on the map, representing different traffic conditions.

By writing the above code, you can use Python to write a program to display real-time traffic information on the map to help you better understand the local traffic conditions, facilitate travel and plan routes. I believe this feature can bring you a better map experience.

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How to write a program in Python and use Baidu Maps API to display real-time traffic conditions on the map?

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