TypeError: not all arguments converted during string formatting

import pandas as pd
import psycopg2
from psycopg2 import sql
import xlsxwriter

def func(input):
    db_details = conn.cursor() # set DB Cursor

    db_details.execute(sql.SQL("""select name from store where name = (%s)"""), (input))
    names = dwh_cursor.fetchall()

    df = pd.DataFrame(names,columns=[desc[0] for desc in dwh_cursor.description])