price_alert's Introduction

Price_Alert

This script gets the price of a product from Amazon.com and sends out SMS notification if it finds a good deal.

How does this work?

It uses Amazon Product Advertising API to get the product's price.
If the current price is lower that last purchase's price or yesterday's price, through Twilio, it sends out a text message to the indicated phone numbers.
It is scheduled to run on every morning by a Cron job.

Setup

Install all the dependencies for the Amazon API wraper.
Install Twilio module: pip install twilio
Create a new config.py file in same directory:

# config.py
# Amazon credentials:
amazon_key = 'YOUR_AMAZON_KEY'
amazon_secret = 'YOUR_AMAZON_SECRET_KEY'
amazon_tag = 'YOUR_AMAZON_ASSOC_TAG'

# Twilio credentials:
twilio_sid = 'YOUR_TWILIO_SID'
twilio_token = 'YOUR_TWILIO_TOKEN'

# Phone numbers:
from_number = '+1 YOUR_TWILIO_PHONE_NUM'
to_number = '+1 YOUR_PHONE_NUM'

Create a new value.py file in the same directory:

# value.py
# Enter your product name here:
name = 'rapsberry pi'

# Enter the price for this product from your last purchase:
price = '34.99'

Execute the script: python3 main.py.

To set up the cron job:

Type in which python3 to get the directory of python3.
crontab -e
This cron job executes the script everyday at 7:30 AM and print the result to a log file:

30 7 * * * cd /YOUR_PATH ; /PYTHON3_PATH  main.py > /YOUR_PATH/repport.log 2>&1

Sample output:

Best match: Optimum Nutrition Serious Mass, Chocolate, 12 Pound
The current price on Amazon: $47.99 is lower than your last purchase!

Best match: Optimum Nutrition Serious Mass, Chocolate, 12 Pound
The current price on Amazon: $47.99 is lower than yesterday price $51.99

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