python做一个界面实现MySQL连接，

好的，可以使用Python的Tkinter库来实现界面，使用MySQLdb库来连接MySQL数据库。

以下是一个简单的示例代码：

import MySQLdb
import tkinter as tk

class MySQLConnector:
    def __init__(self, host, port, user, password, database):
        self.host = host
        self.port = port
        self.user = user
        self.password = password
        self.database = database
        self.conn = None
        self.cursor = None

    def connect(self):
        try:
            self.conn = MySQLdb.connect(
                host=self.host,
                port=self.port,
                user=self.user,
                password=self.password,
                database=self.database,
                charset='utf8'
            )
            self.cursor = self.conn.cursor()
            print("连接成功")
        except Exception as e:
            print("连接失败:", e)

    def close(self):
        if self.cursor:
            self.cursor.close()
        if self.conn:
            self.conn.close()
        print("连接已关闭")

class App:
    def __init__(self, master):
        self.master = master
        self.host_label = tk.Label(master, text="Host:")
        self.host_label.grid(row=0, column=0)
        self.host_entry = tk.Entry(master)
        self.host_entry.grid(row=0, column=1)

        self.port_label = tk.Label(master, text="Port:")
        self.port_label.grid(row=1, column=0)
        self.port_entry = tk.Entry(master)
        self.port_entry.grid(row=1, column=1)

        self.user_label = tk.Label(master, text="User:")
        self.user_label.grid(row=2, column=0)
        self.user_entry = tk.Entry(master)
        self.user_entry.grid(row=2, column=1)

        self.password_label = tk.Label(master, text="Password:")
        self.password_label.grid(row=3, column=0)
        self.password_entry = tk.Entry(master, show="*")
        self.password_entry.grid(row=3, column=1)

        self.database_label = tk.Label(master, text="Database:")
        self.database_label.grid(row=4, column=0)
        self.database_entry = tk.Entry(master)
        self.database_entry.grid(row=4, column=1)

        self.connect_button = tk.Button(master, text="Connect", command=self.connect)
        self.connect_button.grid(row=5, column=0)

        self.close_button = tk.Button(master, text="Close", command=self.close)
        self.close_button.grid(row=5, column=1)

        self.connector = None

    def connect(self):
        host = self.host_entry.get()
        port = int(self.port_entry.get())
        user = self.user_entry.get()
        password = self.password_entry.get()
        database = self.database_entry.get()
        self.connector = MySQLConnector(host, port, user, password, database)
        self.connector.connect()

    def close(self):
        if self.connector:
            self.connector.close()

root = tk.Tk()
app = App(root)
root.mainloop()

在界面中，输入MySQL数据库的连接信息，点击Connect按钮即可连接数据库，点击Close按钮可以关闭连接。

注意：在使用之前，需要先安装MySQLdb库，可使用pip命令进行安装：

pip install MySQLdb

另外，为了安全起见，建议不要在界面中明文显示密码，可以使用show="*"参数将密码框中的字符显示为星号。