You have to put the URL of the product(ex - amazon) in the place of URL.
URL = 'https://www.amazon.in/Philips-Trimmer-Cordless-Corded-QT4011/dp/B00JJIDBIC/ref=sr_1_10?crid=TLCV9AZO2YIP&keywords=trimmer+for+mens&qid=1562520254&s=gateway&sprefix=trimm%2Caps%2C280&sr=8-10'Set the user-Agent value with your user-Agent value
headers = {"User-Agent" : 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36'}Then set your constraint(in if condition) to get mail when product price is gonna below that.
if(pr>1500):Run the Code.
Python filename.py