Nie dodaje rekordu do bazy danych Python Phpmyadmin

Question

Problem polega na tym, że nie dodaje rekordów do bazy danych natomiast sczytuje już istniejące.

import os
import time
import datetime
import MySQLdb

global c
global db

def insert_to_db():
    Ddate = (datetime.datetime.fromtimestamp(time.time()).strftime("%Y-%m-%d"))
    Dtime = (datetime.datetime.fromtimestamp(time.time()).strftime("%H:%M:%S"))
    Dphoto = "zdjecie"
    Dstring = "wykryto zagrozenie"
    print (Ddate + " - " + Dtime + " - " + Dphoto + " - " + Dstring)
    sql =  "INSERT INTO Alarm (Ddate, Dtime, Dphoto, Dstring) VALUES (%s, %s, %s, %s)" 
    try:
        c.execute(sql,( str(Ddate) , str(Dtime), str(Dphoto), str(Dstring)))
        db.commit()
    except:
        db.rollback()
    #db.close()

def read_from_db():
    try:
        #c.execute("SELECT * FROM TAB_CPU WHERE ID = (SELCET MAX(ID) FROM TAB_CPU)")
        c.execute("SELECT * FROM Alarm ORDER BY ID DESC LIMIT 1")      
        result = c.fetchall()
        if result is not None:
              print ('Time: ' , result[0][1], 'Date: ' , result[0][2], ' Photo' , result[0][3], 'Info: ' , result[0][4])
    except:
        print ("read error")
    
def main():
    while 1:
        insert_to_db()
        read_from_db()
        time.sleep(10)
    
if __name__ == '__main__':
    try:
        db = MySQLdb.connect("localhost","rpi","password","SecuritySystem")
        c= db.cursor()
    except:
        print ("Brak polaczania z serwerem...")
             
    try:
      main()
    except KeyboardInterrupt:
      print ("bye bye...")
      pass