> On May 25, 2020, at 11:25 AM, MRAB <pyt...@mrabarnett.plus.com > <mailto:pyt...@mrabarnett.plus.com>> wrote: > > On 2020-05-25 19:00, Ciarán Hudson wrote: >> Hi, >> In the code below, which is an exercise I'm doing in class inheritance, >> almost everything is working except outputting my results, which as the >> function stock_count, to a csv. >> stock_count is working in the code. >> And I'm able to open and close the csv called cars, but the stock_count >> output is not being written to the file. >> Any suggestions? > [snip] >> def stock_count(self): >> print('petrol cars in stock ' + str(len(self.petrol_cars))) >> print('electric cars in stock ' + str(len(self.electric_cars))) >> print('diesel cars in stock ' + str(len(self.diesel_cars))) >> print('hybrid cars in stock ' + str(len(self.hybrid_cars))) >> def process_rental(self): >> answer = input('would you like to rent a car? y/n') >> if answer == 'y': >> self.stock_count() >> answer = input('what type would you like? p/e/d/h') >> amount = int(input('how many would you like?')) >> if answer == 'p': >> self.rent(self.petrol_cars, amount) >> if answer == 'd': >> self.rent(self.diesel_cars, amount) >> if answer == 'h': >> self.rent(self.hybrid_cars, amount) >> else: >> self.rent(self.electric_cars, amount) >> self.stock_count() >> file = open("cars.csv","w") >> file.write(str(self.stock_count())) >> file.close() >> > In 'stock_count' you're telling it to print to the screen. Nowhere in that > function are you telling it to write to a file.
More specifically, your main code calls the dealership.process_rental method. That method calls self.stock_count() which writes to the screen. Then, you are attempting to write the same information to a file. Your code successfully opens a file, but your next line: file.write(str(self.stock_count())) tries to take the output of that self.sock_count() and write that to the file. Your self.stock_count does not return anything, so it returns the special value: None. So, the file is created, and the only thing written to the file is None. Since this is a homework assignment, I won't show you how to do it (I am a teacher). But you need to format the information that you want to write as a string and write that to a file. -- https://mail.python.org/mailman/listinfo/python-list
