help with python project

Question

1.00/5 (2 votes)

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Write a "formal" program that takes an even number list and prints and returns a list in which every even number from the input list has been multiplied by the odd number behind it and every odd number has been divided by the even number after it.

eg [1,2,3,4] -> [0.5, 2, 0.75, 12]

i have this but i don't know if it is good

Python

def numprogram(l):
    count = 0
    for i in l:
        count +=1
        if i % 2 == 0:
            l[i] = i * (i-1)
            l += l[i]
        else:
            l[i] = i / (i+1)
            l += l[i]

Posted 5-Dec-14 17:33pm

Sammyw10

Updated 5-Dec-14 18:29pm

Afzaal Ahmad Zeeshan

v6

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Comments

PIEBALDconsult 5-Dec-14 23:41pm

Seems quite simple. What have you tried? Please use Improve question to show what you have so far and where your are stuck.

Sammyw10 5-Dec-14 23:46pm

so i need the output to be a list, but when i ran this with numprogram([1,2,3,4]) , it returned "0"

PIEBALDconsult 5-Dec-14 23:50pm

You don't want to return, you want to output or print or whatever it is in Python.
I think you'll want another variable, you should probably not be altering the value of i.
The elif could simply be an else, no need to test again.

Sammyw10 5-Dec-14 23:51pm

I just tried that, And it gives me 0

PIEBALDconsult 5-Dec-14 23:56pm

Update the question with the code as it is now.

Sammyw10 6-Dec-14 0:05am

I have updated it

PIEBALDconsult 6-Dec-14 0:15am

Ah.
I think (i-1) should be something like l[(i-1)] , (i+1) as well

(I don't know Python.)

Sammyw10 5-Dec-14 23:48pm

I am using Enthought Canopy btw, if that matters.

PIEBALDconsult 5-Dec-14 23:50pm

I have no idea what that is.

Sammyw10 5-Dec-14 23:54pm

its sort of like visual studio, but designed for python.

Richard MacCutchan 6-Dec-14 4:43am

My knowledge of Python is very basic, but the statements l += l[i] do not seem to be correct.

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Ahsan Abbas · Answer 1 · 2015-01-16T23:34:00

I have done some changes in your code. Result as you required. [0.5, 2, 0.75, 12].

def numprogram(l):
    temp = list()
    count = 0
    for i in l:
        count +=1
        if i % 2 == 0:
            l =  i * (i-1)
            temp.append(l)
        else:
            l = i/float((i+1))
            temp.append(l)
    return temp
            
print numprogram([1,2,3,4])