Given a list of ISBN's (through stdin, line-separated), get the highest-offering school and buyback price for each one

buyback.py

# Author: Mohamed Moselhy
# April 14 2019

import requests
from bs4 import BeautifulSoup
import urllib3
from progress.bar import Bar

urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

#
# class PriceBar(progress.bar.ChargingBar):
#     def __init__(self, isbn_list, schools):
#         super().__init__()
#         self.isbnList = isbn_list
#         self.schools = schools
#
#     message = 'Fetching prices:'
#     suffix = 'ISBN: %(isbn) (%(isbn_idx)/%(isbn_max)). School: %(school) (%(school_idx)/%(school_max))'
#     # suffix = '%(isbn)'
#
#     # def isbn_idx(self):
#     #     return int((self.index/len(self.schools))) % len(self.isbnList)
#     #
#     # def isbn_max(self):
#     #     return len(self.isbnList)
#     #
#     # def isbn_p(self):
#     #     return self.isbn_idx()/len(self.isbnList) * 100
#     #
#     # @property
#     # def isbn(self):
#     #     return self.isbnList[self.isbn_idx()]
#     #
#     # @property
#     # def school_idx(self):
#     #     return (self.index/len(self.isbnList)) % len(self.schools)
#     #
#     # @property
#     # def school_p(self):
#     #     return self.school_idx()/len(self.schools) * 100
#     #
#     # @property
#     # def school_max(self):
#     #     return len(self.schools)
#     #
#     # @property
#     # def school(self):
#     #     return self.schools[self.school_idx()]


def get_schools():
    schools = {}
    url = r'http://sellmytextbooks.org/map.cfm?area=ON'
    html_content = requests.get(url, verify=False)
    soup = BeautifulSoup(html_content.text, features='html.parser')
    link_tags = soup.find_all('a')

    for l in link_tags:
        school_id = l.get('href').split('=')[-1]
        if school_id.isdigit():
            schools[int(school_id)] = l.text

    return schools


def get_price(isbn, school_id):
    payload = {
        'isbn': isbn,
        'Submit': 'Check Price >>'
        }

    with requests.session() as s:
        url = 'http://sellmytextbooks.org/members/{0}/index.cfm?index=QUOTE'.format(str(school_id))
        req = requests.Request('POST', url, data=payload)
        prepped = req.prepare()
        response = s.send(prepped)
        soup = BeautifulSoup(response.text, features='html.parser')
        strongs = soup.find_all('strong')
        strong_text = [s.text for s in strongs if '$' in s.text]
        if len(strong_text) == 0:
            price = 0
        else:
            price = strong_text[0].split('$')[-1].strip()

        return float(price)


def get_all_prices(isbns):
    prices = {}
    schools = get_schools()
    barMessage = "Fetching prices..."
    # bar = PriceBar(isbnList, schools)
    bar = Bar(message=barMessage, max=len(isbnList) * len(schools))
    for isbn in isbnList:
        prices[isbn] = (0, "None")
        for school in schools:
            bar.next()
            price = get_price(isbn, school)
            if price > prices[isbn][0]:
                prices[isbn] = (price, schools[school])
    bar.finish()
    return prices


if __name__ == "__main__":
    isbnList = []
    isbn = input()
    while isbn.isdigit():
        isbnList.append(isbn)
        isbn = input()

    prices = get_all_prices(isbnList)
    for isbn in prices:
        print("ISBN: {0}, Price: ${1}, Buyer: {2}".format(isbn, prices[isbn][0], prices[isbn][1]))