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Kim Andersen6,742 Points
Not sure what I am doing wrong, but the script won't take my price even though I input it as an int. Any ideas?
from models import(Base, session, Book, engine) import datetime import csv def menu(): while True: print(""" \nAdd a Book \rView All Books \rSearch for a Book \rBook Analysis \rExit """) choice = input('What would you like to do? ') if choice in ["1", "2", "3", "4", "5"]: return choice else: input(""" \rPlease choose one of the options above \rA number from 1-5 \rPress enter and try again""") # import models # main menu - add, search, analysis, exit, view # add books to the database # edit books # delete books # search books # data cleaning # loop runs program def clean_date(date_str): months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'] split_date = date_str.split(" ") try: month = int(months.index(split_date) +1) day = int(split_date.split(",")) year = int(split_date) return_date = datetime.date(year, month, day) except ValueError: input(""" \n*** DATE ERROR *** \rThe date format should include a valid Month Day, Year from the past \rEX: January 13, 2003 \rPress enter to try again. \r******************** """) return else: return return_date month = int(months.index(split_date) +1) day = int(split_date.split(",")) year = int(split_date) return def clean_price(price_str): try: price_float = float(price_str) except ValueError: input(""" \n*** Price ERROR *** \rThe price should be a number without a currency symbol \rEX: 10.99 \rPress enter to try again. \r******************** """) else: return int(price_float * 100) def add_csv(): with open("suggested_books.csv") as csvfile: data = csv.reader(csvfile) for row in data: book_in_db = session.query(Book).filter(Book.title==row).one_or_none() if book_in_db == None: title = row author = row date = clean_date(row) price = clean_price(row) new_book = Book(title=title, author=author, published_date=date, price=price) session.add(new_book) session.commit() def app(): app_running = True while app_running: choice = menu() if choice == "1": #add book title = input("Title: ") author = input("Author: ") date_error = True while date_error: date = input("Published date (Ex: October 25, 2017): ") date = clean_date(date) if type(date) == datetime.date: date_error = False price_error = True while price_error: price = input("Price (Ex: 25.64): ") price = clean_price(price) if type(price) == int: price_error = False elif choice == "2": #view book pass elif choice == "3": #search book pass elif choice == "4": # analysis pass else: print("GOODBYE") app_running = False if __name__ == "__main__": Base.metadata.create_all(engine) app() #add_csv() #for book in session.query(Book): # print(book)
Jeff MudayTreehouse Moderator 28,222 Points
You have the beginning of a very nice app!
You forgot to put in the sentinel condition check, it would always loop because price_error always was False. I noticed you return a
float for correct input and
None for incorrect input. I simply check for a price that is "not None" and there you have it!
price_error = True while price_error: price = input("Price (Ex: 25.64): ") price = clean_price(price) # sentinel condition price is not None if not (price is None): price_error = False
Good luck with your Python journey!