How to call Baidu Map API through Python programming to obtain POI details?

How to call Baidu Map API through Python programming to obtain POI details?

Baidu Map API is a set of open interfaces based on geographical information provided by Baidu. Developers can obtain various geographical information-related data by calling the API. Among them, POI (Point of Interest) refers to a specific location on the map, such as shops, hotels, attractions, etc. This article will introduce how to use the Python programming language to call Baidu Map API to obtain POI detailed information.

First, we need to register a Baidu developer account and create an application to gain access. After creating the application, we will obtain a key (AK) for API calls.

Next, we need to install the requests library, which is a commonly used library for sending HTTP requests. The requests library can be installed using the following command:

$ pip install requests

Then, we can write a Python function to call the Baidu Map API to obtain POI details. Here is a sample code:

import requests

def get_poi_details(keyword, city):
    url = "http://api.map.baidu.com/place/v2/search"
    ak = "your_api_key"  # 替换为你的百度开发者密钥

    params = {
        "query": keyword,
        "region": city,
        "output": "json",
        "ak": ak
    }

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

    if data["status"] == 0:
        results = data["results"]
        for result in results:
            print("名称：", result["name"])
            print("地址：", result["address"])
            print("电话：", result["telephone"])
            print("经纬度：", result["location"])
            print("=================================")
    else:
        print("请求失败，错误详情：", data["message"])

# 示例调用
get_poi_details("酒店", "北京")

In the code, we first save the API address of Baidu Maps and our key in variables. Then, we pass in the keyword and city as parameters, construct a GET request URL, and send the request.

Next, we use the requests library to send a GET request and parse the returned JSON response data into a Python dictionary.

Finally, we print out the detailed information of the POI based on the results returned by the API. In the example, we will get a list of hotels in Beijing.

It should be noted that since the number of Baidu Map API calls is limited, developers are recommended to use smaller cities and keywords during the debugging phase to prevent exceeding the limit.

Through the above steps, we can use the Python programming language to call the Baidu Map API to obtain the detailed information of the POI. Keywords and cities can be modified according to actual needs to obtain different types of POI information. This provides convenience for the development of geographical information-related applications, such as travel navigation, restaurant recommendations, etc.

I hope this article will help you understand how to call Baidu Map API through Python programming to obtain POI details. If you are interested in more functions of Baidu Map API, you can refer to the official documentation of Baidu Map API. I wish you success in your geographic information-related development!

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