我的python脚本无法在按钮被按下时发送电子邮件

pip install smtplib

import smtplib
from email.mime.text import MIMEText

def send_email():
    # 设置邮件服务器的相关信息
    smtp_server = 'smtp.example.com'
    smtp_port = 587
    sender_email = 'sender@example.com'
    sender_password = 'password'
    receiver_email = 'receiver@example.com'

    # 创建邮件内容
    subject = 'Test Email'
    body = 'This is a test email.'
    message = MIMEText(body, 'plain')
    message['Subject'] = subject
    message['From'] = sender_email
    message['To'] = receiver_email

    try:
        # 连接邮件服务器并登录
        server = smtplib.SMTP(smtp_server, smtp_port)
        server.starttls()
        server.login(sender_email, sender_password)

        # 发送邮件
        server.sendmail(sender_email, receiver_email, message.as_string())
        print('Email sent successfully!')
    except Exception as e:
        print('Failed to send email. Error:', str(e))
    finally:
        # 关闭连接
        server.quit()

# 调用发送邮件函数
send_email()