[Tutor] using the loop function while another
ramit.prasad at jpmorgan.com
Wed Oct 10 00:24:59 CEST 2012
Mark Lawrence wrote:
> On 09/10/2012 20:47, Amanda Colley wrote:
> > Ok, here is my problem. If a person has two different people to order
> > books for, then when using the loop option, How do you add the two seperate
> > choices together for a final total of books cost?
> > another='y'
> > while another=='y' or another=='Y':
> > choice()
> > another=input('Do you have another book to order for this student?
> > '+\
> > 'Enter y for yes: ')
> > def choice():
> > book=int(input('Enter the book chioce you want: ' +\
> > 'For Hardback Enter the number 1: ' +\
> > 'Paperback Enter the number 2: ' +\
> > 'Electronic Enter the number 3: '))
> > num=int(input('Enter how many you need: '))
> > cost=0
> > if book==1:
> > cost=79
> > elif book==2:
> > cost=49
> > elif book==3:
> > cost=19
> > b_total=float(cost*num)
> > print('Your book cost is $ ',format(b_total,'.2f'))
> Create an empty list at the top of your loop. Store your b_total in the
> list inside the loop with the append method. When the loop finishes use
> the built-in sum function to get the final total.
> Mark Lawrence.
I would also have choice() return the "choice" and "num" and then let the
function calling it assign the book price.
while another=='y' or another=='Y':
book_format = choice() # rename to be more descriptive e.g. get_book_format()
price = price_by_format(book_format)
another=input('Do you have another book to order for this student? '+\
'Enter y for yes: ')
The backslash near the + is also unnecessary and I consider it a
sign of a possible bad habit/practice. You can usually wrap your multi-line
expressions with a parenthesis.
input(' blah ' +
x = (something *
something_else + some_fucntion_call() +
if blah and ( blah != shoo and
shoo != 1 and shoo < 5 and blah is not None ):
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