Detailed steps to implement route planning and real-time traffic query functions using Python and Baidu Map API

Detailed steps for using Python and Baidu Map API to implement path planning and real-time traffic query functions

1. Introduction
With the development of cities, traffic is becoming increasingly congested, and people need to plan routes reasonably when traveling. Avoid congested road sections and also hope to obtain real-time traffic information. Baidu Maps provides a powerful route planning and real-time traffic query API, which we can call using the Python programming language to implement route planning and real-time traffic query functions. This article will introduce in detail how to use Python and Baidu Map API to implement these functions.

2. Preparation
First, we need to install the Python requests library and the developer key of Baidu Map API.

1. Install requests library
   Open the command line terminal and execute the following command to install the requests library:

   pip install requests

2. Get the developer key of Baidu Map API
   Visit Baidu Map Open Platform (http://lbsyun.baidu.com/), register and log in, create an application and obtain a developer key. Note that each account has a certain free request quota per day.

3. Path planning function

1. Import requests library and json library

   import requests
   import json

2. Define path planning function

   def route_planning(origin, destination):
    url = "http://api.map.baidu.com/directionlite/v1/transit"
    params = {
        "origin": origin,
        "destination": destination,
        "ak": "your_api_key"
    }
    response = requests.get(url, params=params)
    result = json.loads(response.text)
    return result

   Note, replace "your_api_key" with the developer key of the Baidu Map API you applied for.

3. Calling the path planning function

   origin = "北京西站"
   destination = "北京南站"
   result = route_planning(origin, destination)
   print(result)

   Here is an example of path planning from Beijing West Railway Station to Beijing South Railway Station.

4. Real-time traffic query function

1. Define real-time traffic query function

   def realtime_traffic(city):
    url = "http://api.map.baidu.com/traffic/v1/bound"
    params = {
        "ak": "your_api_key",
        "bounds": "39.915,116.404,39.979,116.414",
        "city": city
    }
    response = requests.get(url, params=params)
    result = json.loads(response.text)
    return result

   Note, replace "your_api_key" with The developer key of Baidu Map API that you applied for.

2. Calling the real-time traffic query function

   city = "北京市"
   result = realtime_traffic(city)
   print(result)

   Here is an example of querying real-time traffic conditions in Beijing.

5. Summary
The above are the detailed steps for using Python and Baidu Map API to implement path planning and real-time traffic query functions. We can easily implement these functions through Python's requests library and Baidu Map API calls. I hope this article can be helpful to everyone.

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