[Solved]Help to iterate through code

[Solved]Help to iterate through code - Printable Version

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[Solved]Help to iterate through code - Extra - Dec-10-2022

Hello,

I have a code that tracks the price of a product on Amazon.

I made an SQLite table that stores the: Product, URL, Alert_Price.

Furthermore, I would like to be able to have the code iterate through the table, grabbing all the product URL's and Alert_Prices, so they can get plugged into the code and I can get notified if any of the prices drop to the Alert_Price.

For some reason, I am drawing a blank on how to approach this
So, any ideas on how I should go about approaching this?

Thanks in advance.

This is what I have now but it only works with one product, not multiple:

import requests
from bs4 import BeautifulSoup
import sqlite3
from BX_Constants import (MainDatabase)

#------------------------------------------
#            Get Products to Track
#------------------------------------------
#Connect to the database
connection = sqlite3.connect(MainDatabase)
cursor = connection.cursor()

#Get all the info (Product (name), URL (Product's URL), Price_Alert (Budget Price))
cursor.execute("SELECT Product, URL, Alert_Price FROM AmazonPriceTracker")
connection.commit()
Result = cursor.fetchall() #Return all the URLS
connection.close() #Close the connection

print(Result , '\n')
#------------------------------------------

# Set your budget
my_price = 300

# initializing Currency Symbols to substract it from our string
currency_symbols = ['€', '	£', '$', "¥", "HK$", "₹", "¥", "," ] 

# the URL we are going to use
URL = 'https://www.amazon.ca/MSI-Geforce-192-bit-Support-Graphics/dp/B07ZHDZ1K6/ref=sr_1_16?crid=1M9LHOYX99CQW&keywords=Nvidia%2BGTX%2B1060&qid=1670109381&sprefix=nvidia%2Bgtx%2B1060%2Caps%2C79&sr=8-16&th=1'

headers = {
'authority': 'www.amazon.com',
'pragma': 'no-cache',
'cache-control': 'no-cache',
'dnt': '1',
'upgrade-insecure-requests': '1',
'user-agent': 'Mozilla/5.0 (X11; CrOS x86_64 8172.45.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.64 Safari/537.36',
'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
'sec-fetch-site': 'none',
'sec-fetch-mode': 'navigate',
'sec-fetch-dest': 'document',
'accept-language': 'en-GB,en-US;q=0.9,en;q=0.8',
}

#Checking the price
def checking_price():
    # page = requests.get(URL, headers=headers)
    response = requests.get(URL, headers=headers)
    soup = BeautifulSoup(response.content, "html.parser")

    #Finding the elements
    product_title = soup.find('span', class_ = "a-size-large product-title-word-break").getText()
    product_price = soup.find('span', class_ = "a-offscreen").getText()

    # using replace() to remove currency symbols
    for i in currency_symbols : 
        product_price = product_price.replace(i,'')

    ProductTitleStrip = product_title.strip()
    ProductPriceStrip = product_price.strip()
    print(ProductTitleStrip)
    print(ProductPriceStrip)

    #Converting the string to integer
    product_price = int(float(product_price))

    # checking the price
    if(product_price<my_price):
        print("You Can Buy This Now!")
    else:
        print("The Price Is Too High!")


checking_price()

# while True:
#     checking_price()
#     time.sleep(3600) #Run every hour

RE: Help to iterate through code - deanhystad - Dec-10-2022

Hard code your solution to get prices for 2 products. Look for repeated code. That is the code you will execute inside a loop, once for each product.

RE: Help to iterate through code - Extra - Dec-11-2022

I would just like to know how to grab each result from the table & plug those results into my code.

This is what's outputted so far:

Output:[('GTX 1660', 'https://www.amazon.ca/MSI-Geforce-192-bit-Support-Graphics/dp/B07ZHDZ1K6/ref=sr_1_16?crid=1M9LHOYX99CQW&keywords=Nvidia%2BGTX%2B1060&qid=1670109381&sprefix=nvidia%2Bgtx%2B1060%2Caps%2C79&sr=8-16&th=1', '300'),

('27-1 Terminal ScrewDriver', 'https://www.amazon.ca/Multi-Bit-Precision-Screwdriver-Tamperproof/dp/B09SVP9NDQ/ref=sr_1_2?crid=HXK64C1DIYEK&keywords=klein+27+in+1&qid=1670119650&sprefix=klein+27+in+1%2Caps%2C175&sr=8-2', '30'),

('2TB SSD', 'https://www.amazon.ca/Blue-NAND-2TB-SSD-WDS200T2B0A/dp/B073SBRHH6/ref=sr_1_16?crid=1XWXDCH9XNCTE&keywords=2tb+ssd&qid=1670784581&sprefix=2tb+ssd%2Caps%2C168&sr=8-16', '200')]

MSI Gaming Geforce GTX 1660 Super 192-bit HDMI/DP 6GB GDRR6 HDCP Support DirectX 12 Dual Fan VR Ready OC Graphics Card
339.99
The Price Is Too High!

I want to take the URL & Alert_Price from my tables and plug them into the code, but I don't know how to do it since they all get spit out together and in a list.

RE: Help to iterate through code - deanhystad - Dec-11-2022

How much do you know about iterators? Do you know what this will print?

for x in [1, 2, 3]:
    print(x)

How much do you know about indexing? Do you know what this will print?

numbers = [1, 2, 3]
print(numbers[1])

Combining iterating and indexing. Do you know what this will print?

items = [[1, 2, 3], [4, 5, 6]]
for item in items:
    print(item[1])

If you can answer all three questions I don't understand why you cannot see how to iterate through your database query and get the product, url and price. It is exactly the same thing.

RE: Help to iterate through code - Extra - Dec-11-2022

Thanks, that helped me understand it better.

The only problem I have now is that my code only outputs the last item in my table/list not the other 2 items.

How would I go about fixing this, so it displays all the items; not just the last one in the list?

Thanks again.

Output:[('GTX 1660', 'https://www.amazon.ca/MSI-Geforce-192-bit-Support-Graphics/dp/B07ZHDZ1K6/ref=sr_1_16?crid=1M9LHOYX99CQW&keywords=Nvidia%2BGTX%2B1060&qid=1670109381&sprefix=nvidia%2Bgtx%2B1060%2Caps%2C79&sr=8-16&th=1', '300'),

('27-1 Terminal ScrewDriver', 'https://www.amazon.ca/Multi-Bit-Precision-Screwdriver-Tamperproof/dp/B09SVP9NDQ/ref=sr_1_2?crid=HXK64C1DIYEK&keywords=klein+27+in+1&qid=1670119650&sprefix=klein+27+in+1%2Caps%2C175&sr=8-2', '30'),

('2TB SSD', 'https://www.amazon.ca/Blue-NAND-2TB-SSD-WDS200T2B0A/dp/B073SBRHH6/ref=sr_1_16?crid=1XWXDCH9XNCTE&keywords=2tb+ssd&qid=1670784581&sprefix=2tb+ssd%2Caps%2C168&sr=8-16', '200')]

Western Digital 2TB WD Blue 3D NAND Internal PC SSD - SATA III 6 Gb/s, 2.5"/7mm, Up to 560 MB/s - WDS200T2B0A
229.99
The Price Is Too High!

Full Code:

import requests
from bs4 import BeautifulSoup
import sqlite3
from BX_Constants import (MainDatabase)

#------------------------------------------
#            Get Products to Track
#------------------------------------------
#Connect to the database
connection = sqlite3.connect(MainDatabase)
cursor = connection.cursor()

#Get all the Reminders
cursor.execute("SELECT Product, URL, Alert_Price FROM AmazonPriceTracker")
connection.commit()
Result = cursor.fetchall() #Return all the Results
connection.close() #Close the connection

print(Result , '\n')
#------------------------------------------
#--------------------------
# #Prints Product
# for result in Result:
#     print(result[0])

# #Prints URL
# for result in Result:
#     print(result[1])

# #Prints Alert_Price
# for result in Result:
#     print(result[2])
#--------------------------

for result in Result:
    product_name = result[0]
    URL = result[1]
    my_price = int(result[2])
    
# Set your budget
# my_price = 300

# initializing Currency Symbols to substract it from our string
currency_symbols = ['€', '	£', '$', "¥", "HK$", "₹", "¥", "," ] 

# the URL we are going to use
#URL = 'https://www.amazon.ca/MSI-Geforce-192-bit-Support-Graphics/dp/B07ZHDZ1K6/ref=sr_1_16?crid=1M9LHOYX99CQW&keywords=Nvidia%2BGTX%2B1060&qid=1670109381&sprefix=nvidia%2Bgtx%2B1060%2Caps%2C79&sr=8-16&th=1'

headers = {
'authority': 'www.amazon.com',
'pragma': 'no-cache',
'cache-control': 'no-cache',
'dnt': '1',
'upgrade-insecure-requests': '1',
'user-agent': 'Mozilla/5.0 (X11; CrOS x86_64 8172.45.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.64 Safari/537.36',
'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
'sec-fetch-site': 'none',
'sec-fetch-mode': 'navigate',
'sec-fetch-dest': 'document',
'accept-language': 'en-GB,en-US;q=0.9,en;q=0.8',
}

#Checking the price
def checking_price():
    # page = requests.get(URL, headers=headers)
    response = requests.get(URL, headers=headers)
    soup = BeautifulSoup(response.content, "html.parser")

    #Finding the elements
    product_title = soup.find('span', class_ = "a-size-large product-title-word-break").getText()
    product_price = soup.find('span', class_ = "a-offscreen").getText()

    # using replace() to remove currency symbols
    for i in currency_symbols : 
        product_price = product_price.replace(i,'')

    ProductTitleStrip = product_title.strip()
    ProductPriceStrip = product_price.strip()
    print(ProductTitleStrip)
    print(ProductPriceStrip)

    #Converting the string to integer
    product_price = int(float(product_price))

    # checking the price
    if(product_price<my_price):
        print("You Can Buy This Now!")
    else:
        print("The Price Is Too High!")


checking_price()

# while True:
#     checking_price()
#     time.sleep(3600) #Run every hour

RE: Help to iterate through code - deanhystad - Dec-11-2022

You need to call check_price for each product. I would refactor the code, changing check_price() to get_price(), a function that returns the current price for a product.

con = sqlite3.connect(MainDatabase)
for product, url, buy_price in con.execute("SELECT Product, URL, Alert_Price FROM AmazonPriceTracker"):
   current_price = get_price(url)
    if current_price < float(buy_price):
        print(f"Buy {product} ${current_price}")

RE: Help to iterate through code - Extra - Dec-11-2022

Thanks!

That helped solved my problem.

RE: [Solved]Help to iterate through code - deanhystad - Dec-11-2022

Don't let apparent complexity intimidate you. This long list of tuples:

Output:[('GTX 1660', 'https://www.amazon.ca/MSI-Geforce-192-bit-Support-Graphics/dp/B07ZHDZ1K6/ref=sr_1_16?crid=1M9LHOYX99CQW&keywords=Nvidia%2BGTX%2B1060&qid=1670109381&sprefix=nvidia%2Bgtx%2B1060%2Caps%2C79&sr=8-16&th=1', '300'),

('27-1 Terminal ScrewDriver', 'https://www.amazon.ca/Multi-Bit-Precision-Screwdriver-Tamperproof/dp/B09SVP9NDQ/ref=sr_1_2?crid=HXK64C1DIYEK&keywords=klein+27+in+1&qid=1670119650&sprefix=klein+27+in+1%2Caps%2C175&sr=8-2', '30'),

('2TB SSD', 'https://www.amazon.ca/Blue-NAND-2TB-SSD-WDS200T2B0A/dp/B073SBRHH6/ref=sr_1_16?crid=1XWXDCH9XNCTE&keywords=2tb+ssd&qid=1670784581&sprefix=2tb+ssd%2Caps%2C168&sr=8-16', '200')]

Is no different than this:
[("a", "b", "c"), ("a", "b", "c"), ("a", "b", "c")]