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#1
November 6th, 2012, 03:12 PM
 klskl
Registered User

Join Date: Sep 2012
Posts: 10
Time spent in forums: 1 h 35 m 12 sec
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This list.. calculate list ints?

Okey, I just posted here about objects in a list, I got a helpful answer very fast so I was thinking, why not get more help since it is much needed! It is still the list, right now my list looks something like this
Code:
mylist = [name 10, name2 15, name3 23]

This looks retarded I know, but I have the user input a first name, last name and a value into the list, what I want to do is to find the average of the values, if you understand?

I can't get it working, is that becouse i have mixed str and int in the list, is this even possible?

again, all help is appreciated!

#2
November 6th, 2012, 03:20 PM
 Purity_Lake
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Join Date: Mar 2012
Posts: 33
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ya its pretty possible

Code:
list = ['string', 14, '19', 'STRING']

with this list you can see there are two string @ indexes 0 and 3 and two ints @ the indexes 1 and 2
easiest way to add these ints is with a loop like this

Code:
result = 0

for i in list:
if type(i) == type(1):
# type(1) is an int obviously
result += i

and thats it, you have added your ints together and stored the result in the variable 'result'

EDIT:
Also i'm not sure what your are trying to do with your list there is name name2 and name3 of type string that is stored from input? and the ints just the length of the name?

well if so you might want to look at this

Code:
print "Enter your full name:\n"
name1 = raw_input('> ')
name2 = raw_input('> ')
name3 = raw_input('> ')

list = [name1, len(name1), name2, len(name2), name3, len(name3)]

result = 0

for i in list:
if type(i) == type(1):
result += i

print "Your result is %d" %(result)

#3
November 6th, 2012, 03:27 PM
 rrashkin
Contributing User

Join Date: May 2012
Location: 39N 104.28W
Posts: 139
Time spent in forums: 2 Days 20 m 52 sec
Reputation Power: 2
First of all, i think the syntax of the list as stated is wrong:
Code:
>>> mylist = [name 10, name2 15, name3 23]
File "<stdin>", line 1
mylist = [name 10, name2 15, name3 23]
^
SyntaxError: invalid syntax

So if you fix that, then, yes, even what appear to be integers will be strings so you have to deal with that. How about this:
Code:
>>> mylist = ["name 10", "name2 15", "name3 23"]
>>> mylist=[i.split() for i in mylist]
>>> mylist
[['name', '10'], ['name2', '15'], ['name3', '23']]
>>> mylist=zip(*mylist)
>>> mylist
[('name', 'name2', 'name3'), ('10', '15', '23')]
>>> av=sum(map(int,mylist[1]))/len(mylist[1])
>>> av
16
>>>

#4
November 6th, 2012, 04:14 PM
 klskl
Registered User

Join Date: Sep 2012
Posts: 10
Time spent in forums: 1 h 35 m 12 sec
Reputation Power: 0
I'm sorry if i was unclear, it no syntax errorr, but it is hard to explain! still, very helpful, I think I can take it from here, thx guys.

#5
November 6th, 2012, 05:00 PM
 Schol-R-LEA
Commie Mutant Traitor

Join Date: Jun 2004
Location: Norcross, GA (again)
Posts: 1,798
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Are you certain that it is a list that you want? The structure of the data seems more suited to a dictionary, with the name as the key and the score as the value:

Code:
mydict = {name: 10, name2: 15, name3: 23}

This seems like a better solution for the problem at hand, as well.
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