mysql connector with python formating

I wrote a simple script that shows the user a letter and he has to write a human name that starts with the same letter, but I am having a problem automatically compensating for the column name using a variable… Is there a suggestion?

How do I replace the column name with the variable let?

import random
import mysql.connector

while True:
    letters = "AB"
    let = random.choice(letters)
    print(let)
    human = input("Human : ")
    db = mysql.connector.connect(host = 'localhost',
                                 user = 'root',
                                 password = '',
                                 database = 'test')
    mycs = db.cursor()


    mycs.execute(" SELECT * FROM human WHERE {} = {}".format(let,human))


    data = mycs.fetchall()

    if data:
        print("Name exists")
    else:
        print("Name does not exist")

mycs.close()

The error:

B

Human : brad

Traceback (most recent call last):
  File "C:UsersAdministratorDesktopt.py", line 16, in <module>
    mycs.execute(" SELECT * FROM human WHERE {} = {}".format(let,human))
  File "C:Program FilesPython39libsite-packagesmysqlconnectorcursor.py", line 568, in execute
    self._handle_result(self._connection.cmd_query(stmt))
  File "C:Program FilesPython39libsite-packagesmysqlconnectorconnection.py", line 686, in cmd_query
    result = self._handle_result(self._send_cmd(ServerCmd.QUERY, query))
  File "C:Program FilesPython39libsite-packagesmysqlconnectorconnection.py", line 573, in _handle_result
    raise errors.get_exception(packet)
mysql.connector.errors.ProgrammingError: 1054 (42S22): Unknown column 'brad' in 'where clause'

Answer

You just need to put the constant in the to the query between single quotes:

(" SELECT * FROM human WHERE {} = '{}'".format(let,human))