请写出10个python操作mysql的函数，每个函数要能独立运行，我是个小白，请写出每行的详细注释好让我明白这行代码的功能

当然可以！以下是10个Python操作MySQL的函数，每个函数都有注释说明：

import mysql.connector

# 连接MySQL数据库
def connect_to_mysql():
    mydb = mysql.connector.connect(
      host="localhost",
      user="username",
      password="password",
      database="database_name"
    )
    return mydb

# 创建数据库
def create_database(database_name):
    mydb = connect_to_mysql()
    cursor = mydb.cursor()
    cursor.execute("CREATE DATABASE " + database_name)

# 查询所有数据库
def show_databases():
    mydb = connect_to_mysql()
    cursor = mydb.cursor()
    cursor.execute("SHOW DATABASES")
    for db in cursor:
        print(db)

# 创建表
def create_table(table_name, columns):
    mydb = connect_to_mysql()
    cursor = mydb.cursor()
    cursor.execute("CREATE TABLE " + table_name + " (" + columns + ")")

# 插入数据
def insert_data(table_name, values):
    mydb = connect_to_mysql()
    cursor = mydb.cursor()
    cursor.execute("INSERT INTO " + table_name + " VALUES (" + values + ")")
    mydb.commit()

# 查询数据
def select_data(table_name, columns):
    mydb = connect_to_mysql()
    cursor = mydb.cursor()
    cursor.execute("SELECT " + columns + " FROM " + table_name)
    result = cursor.fetchall()
    for row in result:
        print(row)

# 更新数据
def update_data(table_name, set_value, where_condition):
    mydb = connect_to_mysql()
    cursor = mydb.cursor()
    cursor.execute("UPDATE " + table_name + " SET " + set_value + " WHERE " + where_condition)
    mydb.commit()

# 删除数据
def delete_data(table_name, where_condition):
    mydb = connect_to_mysql()
    cursor = mydb.cursor()
    cursor.execute("DELETE FROM " + table_name + " WHERE " + where_condition)
    mydb.commit()

# 删除表
def drop_table(table_name):
    mydb = connect_to_mysql()
    cursor = mydb.cursor()
    cursor.execute("DROP TABLE " + table_name)

# 关闭MySQL连接
def close_mysql():
    mydb = connect_to_mysql()
    mydb.close()

注意，以上代码只是示例，不一定适用于所有情况，具体的实现方式需要根据具体的需求进行调整。