[Tutor] Need help adding a funcation
Here is the code I have written.
# Create main function.
def main():
a = input('Please Enter a Number: ') # Ask user for input.
number = int(a)
x = 1
sum_of = 0
while number > x:
if number % x == 0:
sum_of = sum_of + x
x += 1
if sum_of == number:
print(number,'is a Perfect Number')
elif sum_of < number:
print(number,'is a Non-perfect Number')
main()
Here is the problem I am having. The program works perfect but I need to
add the following:
# a) write a function, getDivisors(), that returns a list of all
# of the positive divisors of a given number. for example -
# result = getDivisors(24)
# print(result)
# would yield: "[ 1, 2, 3, 4, 6, 8, 12]"
# b) write a program that uses your function to determine which
# numbers between 1 and 10,000 are perfect. (answer: 6, 28, 496
# and 8128 are perfect!)
I know that mystring needs to be added. I need help
Thank you in advance
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Re: [Tutor] Need help adding a funcation
The OP has been taught but is still having an issue and all I am doing is
asking for help. Here is what I have so far
# 1) a perfect number is a positive integer that is equal to the
# sum of its proper positive divisors,excluding the number itself.
# for example, 6 is a perfect number because it is evenly divisible
# by 1, 2 and 3 - all of it's divisors - and the sum 1 + 2 + 3 = 6.
# a) write a function, getDivisors(), that returns a list of all
# of the positive divisors of a given number. for example -
# result = getDivisors(24)
# print(result)
# would yield: "[ 1, 2, 3, 4, 6, 8, 12]"
def main():
x = 1
num = int(input('Please Enter a Number: '))
getDivisors(num)
def getDivisors(num):
sum = 0
x = 1
#my_list[] = num
for num in range(1, num, 1):
if num % x == 0:
print(num)
sum += num
print('The sum is ', sum)
if sum == num:
print(num, 'is a perfect number')
else:
print(num, 'is not a perfect number')
main()
On Thu, Dec 1, 2011 at 10:57 AM, Dave Angel wrote:
> (You forgot to post your response on the list, instead posting it
> privately to me. Please use Reply-All, or whatever the equivalent is on
> your email app)
>
>
> On 12/01/2011 11:49 AM, Michael Hall wrote:
>
>> On Thu, Dec 1, 2011 at 7:51 AM, Dave Angel wrote:
>>
>> On 12/01/2011 10:33 AM, Michael Hall wrote:
>>>
>>> Here is the code I have written.
>>>>
>>>> # Create main function.
>>>> def main():
>>>> a = input('Please Enter a Number: ') # Ask user for input.
>>>> number = int(a)
>>>> x = 1
>>>> sum_of = 0
>>>> while number> x:
>>>> if number % x == 0:
>>>> sum_of = sum_of + x
>>>> x += 1
>>>> if sum_of == number:
>>>>print(number,'is a Perfect Number')
>>>> elif sum_of< number:
>>>>print(number,'is a Non-perfect Number')
>>>>
>>>> main()
>>>>
>>>> Here is the problem I am having. The program works perfect but I need to
>>>> add the following:
>>>>
>>>> # a) write a function, getDivisors(), that returns a list of all
>>>> # of the positive divisors of a given number. for example -
>>>> # result = getDivisors(24)
>>>> # print(result)
>>>> # would yield: "[ 1, 2, 3, 4, 6, 8, 12]"
>>>> # b) write a program that uses your function to determine which
>>>> # numbers between 1 and 10,000 are perfect. (answer: 6, 28, 496
>>>> # and 8128 are perfect!)
>>>>
>>>> I know that mystring needs to be added. I need help
>>>> Thank you in advance
>>>>
>>>> I don't see any 'mystring' in the source or in the assignment; why
>>>>
>>> would you think you need it?
>>>
>>> It asks you to write a function called getDivisors(). You have all the
>>> pieces in your present code, but it's all inline. Probably your
>>> professor
>>> wants you to learn to code in small functions, so your code is more
>>> likely
>>> to be reusable.
>>>
>>> So what part of the function description is unclear? And is it unclear
>>> because you don' t understand one of the math terms, or because you don't
>>> know how to code it?She wants a function that takes a single argument
>>> (number), and returns a list
>>>
>>> def getDivisors(number):
>>> do some stuff
>>> return mylist
>>>
>>> You'll probably want to write another one that adds up the elements of a
>>> list (or you could find it in the stdlib). Then your main should be
>>> pretty
>>> straightforward.
>>>
>>>
>>>
>>> --
>>>
>>> Dave
>>>
>>
>
> A
>
>>
>>> The truth is I am unsure how to code it. Here is my guess:
>>>
>>
>> def main():
>> a = input('Please Enter a Number: ') # Ask user for input.
>> number = int(a)
>> x = 1
>> sum_of = 0
>> while number> x:
>> if number % x == 0:
>> sum_of = sum_of + x
>> x += 1
>> if sum_of == number:
>>print(number,'is a Perfect Number')
>> elif sum_of< number:
>>print(number,'is a Non-perfect Number')
>> def getDiviso
Re: [Tutor] Need help adding a funcation
Can anyone else help with this question?
On Thu, Dec 1, 2011 at 12:17 PM, Dave Angel wrote:
> (You top-posted, so I'm deleting all the out-of-order stuff. in these
> forums, you should put your response after whatever you quote.)
>
>
> On 12/01/2011 02:55 PM, Michael Hall wrote:
>
>> The OP has been taught but is still having an issue and all I am doing is
>> asking for help. Here is what I have so far
>>
>> # 1) a perfect number is a positive integer that is equal to the
>> # sum of its proper positive divisors,excluding the number itself.
>> # for example, 6 is a perfect number because it is evenly divisible
>> # by 1, 2 and 3 - all of it's divisors - and the sum 1 + 2 + 3 = 6.
>> # a) write a function, getDivisors(), that returns a list of all
>> # of the positive divisors of a given number. for example -
>> # result = getDivisors(24)
>> # print(result)
>> # would yield: "[ 1, 2, 3, 4, 6, 8, 12]"
>>
>> def main():
>> x = 1
>>
>> num = int(input('Please Enter a Number: '))
>> getDivisors(num)
>>
>
> You'll want to store the return value of getDivisors, since you have more
> work to do there.
>
>
>
>> def getDivisors(num):
>> sum = 0
>> x = 1
>> #my_list[] = num
>>
>
> That's close. To create an empty list, simply do
>my_list = []
>
>
> for num in range(1, num, 1):
>>
>> if num % x == 0:
>> print(num)
>> sum += num
>>
> Why are you summing it? That was in another function. In this one,
> you're trying to build a list. Any ideas how to do that at this point in
> the function?
>
>
>> print('The sum is ', sum)
>> if sum == num:
>> print(num, 'is a perfect number')
>> else:
>> print(num, 'is not a perfect number')
>>
> None of these lines belong in your function. All it's supposed to do is
> get the divisors, not to study them in any way.
>
>
>> main()
>>
>
>
>
> --
>
> DaveA
>
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Re: [Tutor] Need help adding a funcation
I am still not understanding what it is I am being asked to do. What is the
differance between my_list = [] an my_list[ ] because when I use my_list[]
I get an error. Not sure what I am doing wrong. I am asking if you are
given the following question how would you write the program. I have most
of it. Here is what I know works
# Create main function.
def main():
a = input('Please Enter a Number: ') # Ask user for input.
number = int(a)
x = 1
sum_of = 0
getDivisors
while number > x:
if number % x == 0:
sum_of = sum_of + x
x += 1
if sum_of == number:
print(number,'is a Perfect Number')
elif sum_of < number:
print(number,'is a Non-perfect Number')
def getDivisors(num):
sum = 0
x = 1
#my_list[] = num
for num in range(1, num, 1):
if num % x == 0:
print(num)
sum += num
print('The sum is ', sum)
if sum == num:
print(num, 'is a perfect number')
else:
print(num, 'is not a perfect number')
main()
This is what the teacher is asking for:
# 1) a perfect number is a positive integer that is equal to the
# sum of its proper positive divisors,excluding the number itself.
# for example, 6 is a perfect number because it is evenly divisible
# by 1, 2 and 3 - all of it's divisors - and the sum 1 + 2 + 3 = 6.
# a) write a function, getDivisors(), that returns a list of all
# of the positive divisors of a given number. for example -
# result = getDivisors(24)
# print(result)
# would yield: "[ 1, 2, 3, 4, 6, 8, 12]"
# b) write a program that uses your function to determine which
# numbers between 1 and 10,000 are perfect. (answer: 6, 28, 496
# and 8128 are perfect!)
I am asking for help writing it. I am new to programming. Lost alot of
brain matter.
On Thu, Dec 1, 2011 at 3:22 PM, Alan Gauld wrote:
> On 01/12/11 21:17, Michael Hall wrote:
>
>> Can anyone else help with this question?
>>
>
> Sure lots of us could help. But Dave's doing a good job
> leading you in the right direction.
>
> Is there something that you don't understand? If you ask about specific
> points we can give specific answers. Meantime I'll add a few extra comments
> to see if that helps...
>
>
>def main():
>> x = 1
>>
>> num = int(input('Please Enter a Number: '))
>> getDivisors(num)
>>
>>
>>You'll want to store the return value of getDivisors, since you have
>>more work to do there.
>>
>
> What Dave means is that you are simply calling the function but not
> storing the result. So you calculate the divisors but then have no chance
> to use them. You need to store them in a variable someplace.
> Think about the input() function you use above.
>
> If you had just done
>
>
> int(input('Please Enter a Number: '))
>
> You couldn't use the value that the user entered.
> You had to assign it to num to do that. It's the same
> with your function getDivisors()
>
>
>def getDivisors(num):
>> sum = 0
>> x = 1
>> #my_list[] = num
>>
>>That's close. To create an empty list, simply do
>>my_list = []
>>
>
> self explanatory, I hope.
>
>
>
> for num in range(1, num, 1):
>>
>> if num % x == 0:
>> print(num)
>> sum += num
>>
>>Why are you summing it? That was in another function. In this one,
>>you're trying to build a list. Any ideas how to do that at this
>>point in the function?
>>
>
> So you need to store your results as a list not as a number. So instead of
> sum() what can you do to my_list to add a new element?
> If you aren't sure fire up the Python >>> prompt and try
> help(list) or just help([]) and see if you can see anything useful.
>
>
> print('The sum is ', sum)
>> if sum == num:
>> print(num, 'is a perfect number')
>> else:
>> print(num, 'is not a perfect number')
>>
>>None of these lines belong in your function. All it's supposed to
>>do is get the divisors, not to study them in any way.
>>
>
> This is a good principle to apply when writing functions. Separate out the
> display from the logic. That way you can use the results of the logic with
> any kind of user interface - GUI, Web, or command line, or even in a server
> process without a UI.
>
> But this takes us back
