在PYCHARM里为我设计一个接口连接两个不同的MYSQL数据库，要求增删改查

在PyCharm中设计一个能够连接并操作两个不同MySQL数据库的接口，可以采用以下步骤和Python库，例如使用`pymysql`库来实现基本的数据库操作，加上一些封装来提供增删改查的功能。这里假设你已经有一个基础的数据库连接模块（如`db_1`和`db_2`分别对应两个数据库）：

import pymysql

class DualDBHandler:
    def __init__(self):
        # 初始化两个数据库连接
        self.conn1 = pymysql.connect(host='localhost', user='user1', password='password1', db='database1')
        self.conn2 = pymysql.connect(host='localhost', user='user2', password='password2', db='database2')

    # 定义增删改查的基本方法
    def insert_data(self, table_name, data, db_index=0):  
        if db_index == 0:
            with self.conn1.cursor() as cursor:
                sql = "INSERT INTO {} VALUES {}".format(table_name, data)
                cursor.execute(sql)
                self.conn1.commit()
        elif db_index == 1:
            with self.conn2.cursor() as cursor:
                sql = "INSERT INTO {} VALUES {}".format(table_name, data)
                cursor.execute(sql)
                self.conn2.commit()

    def delete_data(self, table_name, condition, db_index=0):
        if db_index == 0:
            with self.conn1.cursor() as cursor:
                sql = "DELETE FROM {} WHERE {}".format(table_name, condition)
                cursor.execute(sql)
                self.conn1.commit()
        else:
            with self.conn2.cursor() as cursor:
                sql = "DELETE FROM {} WHERE {}".format(table_name, condition)
                cursor.execute(sql)
                self.conn2.commit()

    def update_data(self, table_name, set_values, where_condition, db_index=0):
        if db_index == 0:
            with self.conn1.cursor() as cursor:
                sql = "UPDATE {} SET {} WHERE {}".format(table_name, set_values, where_condition)
                cursor.execute(sql)
                self.conn1.commit()
        else:
            with self.conn2.cursor() as cursor:
                sql = "UPDATE {} SET {} WHERE {}".format(table_name, set_values, where_condition)
                cursor.execute(sql)
                self.conn2.commit()

    def select_data(self, table_name, columns=None, where_condition=None, db_index=0):
        if db_index == 0:
            with self.conn1.cursor() as cursor:
                query = "SELECT"
                if columns:
                    query += " {},".format(columns)
                query += " FROM {} ".format(table_name)
                if where_condition:
                    query += "WHERE {}".format(where_condition)
                cursor.execute(query)
                return cursor.fetchall()
        else:
            with self.conn2.cursor() as cursor:
                query = "SELECT"
                if columns:
                    query += " {},".format(columns)
                query += " FROM {} ".format(table_name)
                if where_condition:
                    query += "WHERE {}".format(where_condition)
                cursor.execute(query)
                return cursor.fetchall()

# 使用示例
handler = DualDBHandler()
handler.insert_data('table1', ('value1', 'value2'), 0)  # 插入到db1
handler.delete_data('table2', 'id = 1', 1)  # 删除db2的记录
...

请注意，这只是一个基本的模板，实际应用中还需要考虑错误处理和资源管理。另外，对于复杂的多库操作，你可能会倾向于使用ORM框架（如SQLAlchemy）来简化工作流程。