philberndt philberndt - 28 days ago 17
Python Question

Help with a python code

I'm reading this python book called "Python for software design" and it has the following exercise:


Suppose the cover price of a book is $24.95, but the bookstores get a 40% discount.
Shipping costs $3 for the first copy and 75 cents for each additional copy. What
is the total wholesale cost for 60 copies


ok, i have the following code:

bookPrice = 24.95
discount = .60
shippingPriceRest = .75
shippingPriceFirst = 3.00
totalUnits = 60

bookDiscountAmount = bookPrice * discount * totalUnits
shipping = shippingPriceRest * 59 + shippingPriceFirst

result = bookDiscountAmount + shipping


print 'The total price for 60 books including shipping and discount is: '
print 'Total price of the books is: ' + str(bookDiscountAmount)
print 'Total Shipping is: ' + str(shipping)
print 'The Total price is: ' + str(result)


With that I get the following results:


  • The total price for 60 books including shipping and discount is:

  • Total price of the books is: 898.2

  • Total Shipping is: 47.25

  • The Total price is: 945.45

  • My questions are:


    • Is this correct?

    • How can i make this code better?



Answer

There are only three things to change:

1) You duplicated the number of books: 60 and 59 both appear in the code. You shouldn't have 59 in there.

2) Print you results like this: print 'The total price is: %.2f' % result

3) Usual Python convention is to name variables_like_this, notLikeThis.