import mysql.connector

def create_db_sampledb():
    global conn
    config_root ={
        "host":"localhost",
        "user":"root",
        "password":"*******"}
    sql = "Create Database If Not Exists sampledb CHARSET =utf8 COLLATE=utf8_bin"
    try:
        conn = mysql.connector.connect(**config_root)
        cursor = conn.cursor()
        cursor.execute(sql)
        conn.commit()
    finally:
        conn.close()
create_db_sampledb()

出现下面这个报错结果，有没有哪个大神知道怎么解决的？
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_27744/4191062787.py in create_db_sampledb()
      8     try:
----> 9         conn = mysql.connector.connect(**config_root)
     10         cursor = conn.cursor()

NameError: name 'mysql' is not defined

During handling of the above exception, another exception occurred:

NameError                                 Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_27744/4191062787.py in <module>
     13     finally:
     14         conn.close()
---> 15 create_db_sampledb()

~\AppData\Local\Temp/ipykernel_27744/4191062787.py in create_db_sampledb()
     12         conn.commit()
     13     finally:
---> 14         conn.close()
     15 create_db_sampledb()

NameError: name 'conn' is not defined