How to use Python to call Baidu Map API to implement geographical location query function?

How to use Python to call Baidu Map API to implement the geographical location query function?

With the development of the Internet, the acquisition and utilization of geographical location information is becoming more and more important. Baidu Maps is a very common and practical map application that provides a wealth of geographical location query services. This article will introduce how to use Python to call Baidu Map API to implement the geographical location query function, and attach a code example.

1. Apply for Baidu Map developer account and application
   First, you need to have a Baidu Map developer account and create an application. Log in to the Baidu Map Developer Center (http://lbsyun.baidu.com/), click "Console", and follow the prompts to complete account registration and application creation.
2. Get Baidu Map API Key
   In the created application, find "Key Management" and click "Get Key" to obtain the key required to access Baidu Map API.
3. Installing Python request library
   There are many HTTP request libraries available in Python. This article takes the requests library as an example. Use the following command to install the requests library:
   pip install requests
4. Write Python code to implement the geographical location query function
   Next, we will implement the geographical location query function by writing Python code. The code example is as follows:

import requests

def get_location(address):
    url = "http://api.map.baidu.com/geocoding/v3/"
    ak = "your_api_key"  # 替换成你自己的百度地图API密钥
    params = {
        "address": address,
        "ak": ak
    }
    response = requests.get(url, params=params)
    data = response.json()
    
    if data["status"] == 0:
        location = data["result"]["location"]
        print("经度：", location["lng"])
        print("纬度：", location["lat"])
    else:
        print("查询失败")

address = input("请输入地理位置：")
get_location(address)

In the code, we first define a get_location function, which accepts an address parameter address as input. Then, we assign the API address of Baidu Maps to the url variable and replace it with our own key. Next, we use the requests.get method to send an HTTP GET request, passing in the address parameters and key as query parameters. Finally, we parse the returned JSON data and output the queried latitude and longitude information.

5. Run the code and test
   Save the above code to a Python file, and then run the file through the command line. The code will prompt you to enter a geographic location, and you can enter any geographic location for testing. The code returns the latitude and longitude information for that location.

The above are the steps and sample code for using Python to call Baidu Map API to implement the geographical location query function. Through Baidu Map API, we can obtain geographical location information very conveniently, which provides convenience for map application development. Hope this article can be helpful to you!

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