How to build real-time traffic route planning function using Python and Baidu Map API

Method of using Python and Baidu Map API to build real-time traffic route planning function

As the scale of cities continues to expand, traffic congestion has become a major problem in urban life. If traffic route information can be obtained in real time, it will be of great help in avoiding congested road sections and choosing the optimal route. This article will introduce how to use Python and Baidu Map API to build a real-time traffic route planning function.

First, we need to register a Baidu developer account and obtain the key. Baidu Map API provides a wealth of functions, including route planning, location retrieval, etc. We will use the route planning function of Baidu Map API to implement transportation route planning.

After obtaining the key, the next step is to install Python's request library in order to send requests and get responses. We can use Python's "requests" library to send HTTP requests.

Import the "requests" library in the code:

import requests

Next, we need to build the request URL. The route planning function of Baidu Map API requires the latitude and longitude coordinates of the starting point and end point. Suppose we want to plan a transportation route from starting point A to end point B. We can use the location search function of Baidu Map to obtain the longitude and latitude coordinates of starting point A and end point B.

The code to construct the request URL is as follows:

url = "http://api.map.baidu.com/place/v2/search?query={}&region={}&output=json&ak={}".format(place, region, ak)

Among them, the "query" parameter is the name of the place to be searched, the "region" parameter is the region, and the "output" parameter specifies the output format. is json, and the "ak" parameter is the key of Baidu Map API.

The code for sending an HTTP request to obtain a response is as follows:

response = requests.get(url)
result = response.json()

After obtaining the latitude and longitude coordinates of the starting point A and the ending point B, we can use the route planning function of the Baidu Map API to obtain the traffic route information.

The code to construct the route planning request URL is as follows:

url = "http://api.map.baidu.com/direction/v2/transit?origin={},{}&destination={},{}&ak={}".format(origin_lng, origin_lat, dest_lng, dest_lat, ak)

Among them, the "origin" parameter is the longitude and latitude coordinates of the starting point, the "destination" parameter is the longitude and latitude coordinates of the destination, and the "ak" parameter is Baidu The key for the map API.

The code for sending an HTTP request to obtain a response is as follows:

response = requests.get(url)
result = response.json()

After obtaining the traffic route information, we can parse and process the returned data to extract the information we need. For example, we can obtain the name, distance, estimated time consumption, etc. of the transportation route.

Finally, we can display the obtained traffic route information to the user. You can use Python's GUI library to build a simple interface to facilitate users' transportation route planning.

In summary, the method of using Python and Baidu Map API to build a real-time traffic route planning function includes registering a Baidu developer account and obtaining the key, installing the Python request library, building the request URL, and sending an HTTP request to obtain Respond, parse and process response data, and display traffic route information.

import requests

# 获取起点和终点的经纬度坐标

origin = input("请输入起点：")
destination = input("请输入终点：")

# 构建起点和终点的请求URL

url = "http://api.map.baidu.com/place/v2/search?query={}&region={}&output=json&ak={}".format(origin, "中国", your_ak)
response = requests.get(url)
result = response.json()
origin_lng = result["results"][0]["location"]["lng"]
origin_lat = result["results"][0]["location"]["lat"]

url = "http://api.map.baidu.com/place/v2/search?query={}&region={}&output=json&ak={}".format(destination, "中国", your_ak)
response = requests.get(url)
result = response.json()
dest_lng = result["results"][0]["location"]["lng"]
dest_lat = result["results"][0]["location"]["lat"]

# 构建路线规划的请求URL

url = "http://api.map.baidu.com/direction/v2/transit?origin={},{}&destination={},{}&ak={}".format(origin_lng, origin_lat, dest_lng, dest_lat, your_ak)
response = requests.get(url)
result = response.json()

# 解析和处理响应数据

routes = result["result"]["routes"]
for route in routes:
    route_name = route["name"]
    distance = route["distance"]
    duration = route["duration"]
    print("路线：{}，距离：{}米，预计耗时：{}分钟".format(route_name, distance, duration))

# 展示交通路线信息

# 使用GUI库构建用户界面，并展示交通路线信息

The above is how to build a real-time traffic route planning function using Python and Baidu Map API. Through this method, users can plan optimal routes based on real-time traffic conditions, avoid congested road sections, and improve travel efficiency.

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