Use Python to write a program to implement the function of obtaining surrounding POI points based on Baidu Map API

Example of Python program for obtaining surrounding POI points based on Baidu Map API

Introduction:
With the continuous development of the Internet, map applications have become an indispensable part of our daily lives. In map applications, POI (Points of Interest) points refer to places that people are interested in and worthy of attention. In many cases, we need to obtain information about surrounding POI points according to our own needs. This article will use the Python programming language and combine it with Baidu Map API to achieve the function of obtaining surrounding POI points.

1. Preparation:
Before we start writing Python programs, we first need to prepare some basic materials:

1. Python 3.x environment.
2. Install the requests library, used to send HTTP requests and process responses.
3. Baidu Map API key, used to call the map API interface.

2. Write a program:
Next, let us start writing a program to achieve the function of obtaining surrounding POI points based on Baidu Map API.

1. Import the required libraries:

   import requests

2. Define the function to obtain surrounding POI points:

   def get_nearby_pois(api_key, location, radius, keyword):
    url = 'http://api.map.baidu.com/place/v2/search?'
    params = {
        'query': keyword,
        'location': location,
        'radius': radius,
        'output': 'json',
        'page_size': 20,
        'page_num': 0,
        'ak': api_key
    }
    response = requests.get(url, params=params)
    result = response.json()
    pois = result.get('results')
    return pois

In the above code, we define a function named get_nearby_pois. This function receives four parameters: api_key (Baidu Map API key), location (center point coordinates, format is "latitude, longitude"), radius (search radius, unit is meters), keyword (keyword). By calling the Baidu Map API interface, we can obtain information about relevant POI points.

3. Call the function and output the result:

   if __name__ == '__main__':
    api_key = 'YOUR_API_KEY'
    location = '39.915,116.404'  # 以北京市中心为例
    radius = 1000  # 搜索半径为1000米
    keyword = '餐厅'  # 搜索关键词为餐厅
    pois = get_nearby_pois(api_key, location, radius, keyword)
    for poi in pois:
        print(poi.get('name'), poi.get('address'))

At the main entrance of the program, we specify the API key, center point coordinates, search radius and keywords, and called the previously defined get_nearby_pois function to obtain information about surrounding POI points. Finally, we iterate through the POI list and output the name and address of each POI point.

3. Run the program:
Save the above code as a .py file and run it using the Python interpreter. During the running process, make sure that the requests library has been installed and replace YOUR_API_KEY with your own Baidu Map API key. The running result will output the names and addresses of surrounding POI points.

Summary:
This article combines the Python programming language and Baidu Map API to implement the function of obtaining surrounding POI points based on the API. By managing the POI point information obtained, we can customize various needs in our own applications, such as searching for surrounding restaurants, attractions, etc. Through continuous learning and research, we can further expand this feature to make it more convenient and practical.

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