如何将提交按钮连接到我的.py文件？

<button id="submitBtn">提交</button>

document.getElementById("submitBtn").addEventListener("click", function() {
  // 获取表单数据
  var formData = new FormData();
  formData.append("username", document.getElementById("username").value);
  formData.append("password", document.getElementById("password").value);

  // 发送POST请求
  var xhr = new XMLHttpRequest();
  xhr.open("POST", "/path/to/your/py/file.py", true);
  xhr.onreadystatechange = function() {
    if (xhr.readyState === 4 && xhr.status === 200) {
      // 请求成功处理逻辑
      console.log(xhr.responseText);
    }
  };
  xhr.send(formData);
});

from flask import Flask, request

app = Flask(__name__)

@app.route("/path/to/your/py/file.py", methods=["POST"])
def handle_request():
    username = request.form.get("username")
    password = request.form.get("password")

    # 处理表单数据
    # ...

    return "Success"

if __name__ == "__main__":
    app.run()