Python programming skills: How to obtain bus stop information based on Baidu Map API

Python programming skills: How to obtain bus stop information based on Baidu Map API

Introduction:
When developing positioning or navigation applications, how to obtain bus stop information is a common requirement. Baidu Maps provides a powerful API interface that can easily obtain various geographical information. This article will introduce how to use Python programming language combined with Baidu Map API to obtain bus stop information, and provide code examples.

1. Preparation:
First, we need to install the Requests library.

# 安装Requests库
pip install requests

At the same time, we also need to apply for a developer account of Baidu Map API and obtain the corresponding API key.

2. Write code:
The following is a Python code example to obtain bus stop information:

import requests

def get_bus_stations(city, keywords):
    url = "http://api.map.baidu.com/place/v2/search"

    params = {
        "ak": "your_api_key",    # 替换成你的API密钥
        "query": "公交车站",
        "region": city,
        "output": "json",
        "page_size": 10,
        "page_num": 0
    }

    response = requests.get(url, params=params)
    data = response.json()
    results = data["results"]

    for result in results:
        station_name = result["name"]
        location = result["location"]
        latitude = location["lat"]
        longitude = location["lng"]

        print("公交站点名称：", station_name)
        print("经纬度：", latitude, longitude)
        print("=" * 30)

# 示例：获取北京市某个区的公交站点信息
city = "北京市海淀区"
keywords = "五道口"

get_bus_stations(city, keywords)

3. Code analysis:

1. Introduce the Requests library
   We first introduced Python's requests library, which can easily send HTTP requests and interact with the API.
2. Constructing request parameters
   Before calling Baidu Map API, we need to configure the corresponding request parameters first. In this example, we need to set the ak parameter to the applied API key, the query parameter to "Bus Station", the region parameter to the city name, The output parameter is "json", as well as the page_size and page_num parameters to limit the number of results and the number of pages per page.
3. Send a request and get a response
   Use the requests.get() method to send a GET request and pass in the URL and request parameters. Then use the .json() method to extract the data from the response and assign it to the data variable.
4. Extract site information
   From the response results, we can get the relevant information of the bus stops. In the example, we extract the name and latitude and longitude of the site and print it out. You can process this data according to your own needs, such as saving to a database or generating a map.

4. Usage examples:
In the sample code, we demonstrate how to obtain information about bus stops in a certain area of ​​Haidian District, Beijing. You can replace the values ​​of the city and keywords variables according to your needs to obtain bus stop information in any city and region.

Conclusion:
This article introduces the method of using Python programming language combined with Baidu Map API to obtain bus stop information, and provides relevant code examples. I hope this article can help you quickly obtain bus stop information when developing positioning or navigation applications. If you have any questions or concerns, please feel free to communicate with us.

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