Python programming tutorial: Using Baidu Map API to implement comprehensive functions of route planning and traffic situation

Python Programming Tutorial: Using Baidu Map API to realize the comprehensive functions of path planning and traffic situation

Introduction:
With the rapid development of intelligent transportation, our demand for path planning and traffic situation is increasing The higher. The API interface provided by Baidu Map provides convenience for us to implement these functions. This tutorial will lead you to use the Python programming language to realize the comprehensive functions of route planning and traffic situation by calling Baidu Map API.

Preface:
Before we start writing code, we need to prepare some necessary tools. First, we need to make sure Python is installed on our computer. Secondly, we need to obtain the access key to Baidu Map API. You can apply for a free key on the Baidu Map Open Platform for development and debugging.

1. Implementation of path planning function
Path planning refers to finding an optimal path based on the location information between the starting point and the end point.

In Python, we can use the requests library to send HTTP requests and obtain the results returned by Baidu Map API. The following is a simple sample code:

import requests

url = 'http://api.map.baidu.com/direction/v2/transit'
ak = 'your_access_key'  # 请将your_access_key替换为自己的访问密钥
origin = '北京市海淀区中关村大街1号'
destination = '北京市朝阳区望京西路4号'

params = {
    'origin': origin,
    'destination': destination,
    'ak': ak
}

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

routes = result['result']['routes']
for route in routes:
    duration = route['duration']
    distance = route['distance']
    print(f"预计耗时：{duration}秒")
    print(f"路程距离：{distance}米")

In the above code, we obtain the path planning results by sending an HTTP GET request to the /transit interface and passing parameters such as the starting point, end point, and key. We use the json() method to convert the returned JSON format data into a Python object, and then extract the information we need.

2. Traffic situation function implementation
Traffic situation refers to displaying road congestion, traffic events and other information based on real-time traffic data.

We can also implement the traffic situation function through Baidu Map API. The following is a simple sample code:

import requests

url = 'http://api.map.baidu.com/traffic/v1/bound'
ak = 'your_access_key'  # 请将your_access_key替换为自己的访问密钥
bounds = '39.915,116.404,39.975,116.414'

params = {
    'ak': ak,
    'bounds': bounds
}

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

roads = result['description']['roads']
for road in roads:
    name = road['name']
    status = road['status']
    print(f"道路名称：{name}")
    print(f"交通状况：{status}")

In the above code, we obtain the traffic situation results by sending an HTTP GET request to the /bound interface and passing parameters such as range and key. Similarly, we also convert the returned JSON format data into Python objects and extract the information we need.

Conclusion:
Through this tutorial, we learned how to use the Python programming language and Baidu Map API to implement comprehensive functions of route planning and traffic situation. Hope this helps you understand how to use Baidu Map API. Of course, Baidu Map API also provides more rich functions and interfaces, and we can further develop and expand according to our own needs.

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