Develop WeChat applet using Python

With the popularity of mobile Internet technology and smartphones, WeChat has become an indispensable application in people's lives. WeChat mini programs allow people to directly use mini programs to solve some simple needs without downloading and installing applications.

This article will introduce how to use Python to develop WeChat applet.

1. Preparation

Before using Python to develop WeChat mini programs, you need to install the relevant Python libraries. It is recommended to use the two libraries wxpy and itchat here.

wxpy is a WeChat robot framework that can implement automated operations, such as automatically replying to messages, sending messages at regular intervals, etc. You can also obtain information such as articles from public accounts followed by WeChat through the Bot class in wxpy. For specific usage of wxpy, please refer to the official documentation of wxpy.

itchat is also a Python library used for the implementation of unofficial WeChat API. Most WeChat functions can be implemented through itchat, including logging in/out of WeChat, sending/receiving messages, receiving friend requests, etc. The real power of itchat is that it provides a simple command line interface that facilitates user communication (such as chatting, sending pictures/videos, etc.).

2. Create a mini program

On the WeChat public platform, you can create a mini program. The specific steps are as follows:

1. First you need to have a WeChat public account , and perform developer certification on the WeChat public platform.
2. Click the "Develop" button, select "Mini Program" in the left navigation bar, and then click the "Create Mini Program" button.
3. Enter the mini program name and select the mini program type, and upload the mini program's icon and cover image.
4. Click "OK", and then you can use WeChat developer tools for development.

3. Use Python to interact with small programs

Through the two libraries wxpy and itchat, Python can interact with small programs. The specific steps are as follows:

1. Save the ID and key of the applet in the Python code.
2. In Python code, use wxpy or itchat library to log in to the WeChat account.
3. Use the send() function in the itchat library or the send() function in the wxpy library to send messages to the mini program.
4. After receiving the message, the applet can reply with the corresponding response information.

The following is a simple example to demonstrate the interaction between Python and the WeChat applet:

1. First, we need to save the ID and key of the applet in Python in code. Assume that the ID of the applet is "wxappid" and the key is "wxappsecret". The code is as follows:

wx_appid = 'wxappid'
wx_appsecret = 'wxappsecret'

2. Next, we use the itchat library to log in to the WeChat account and send a text message to the applet program. The code is as follows:

import itchat

# 登录微信账号
itchat.auto_login()

# 发送消息给小程序
itchat.send('Hello，小程序', toUserName='wxappid')

3. After receiving the message, the applet can reply to the corresponding message through the onMessage() function in the developer tools. The code is as follows:

App({
  onLaunch: function () {
    // ...
  },
  onShow: function () {
    // ...
  },
  onHide: function () {
    // ...
  },
  onUnload: function () {
    // ...
  },
  onMessage: function (msg) {
    if (msg.fromUserName === '发送消息的微信号') {
      return {
        title: 'Hello，已回复消息',
        path: '/pages/index/index'
      }
    }
  }
})

4. Summary

This article introduces how to use Python to interact with WeChat applet. As a powerful programming language, Python can realize automated operations and data processing, and using Python to develop small programs can reduce developers' learning costs. Through the combination of Python and small programs, we can implement more interesting functions and provide users with better services.

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