connection = pymysql.connect(host='localhost',
                             user='root',
                             password='password',
                             db='blog',
                             charset='utf8',
                             cursorclass=pymysql.cursors.DictCursor)


with connection.cursor() as cursor:
    # Read a single record
    sql = "SELECT * from categories"
    cursor.execute(sql)
    result = cursor.fetchall()
    print(result)
    connection.close()

#do other thins ..............................
#maby return here and do not execute below
#occur error below

with connection.cursor() as cursor:
    # Read a single record
    sql = "SELECT * from categories"
    cursor.execute(sql)
    result = cursor.fetchall()
    print(result)