Roelof Wobben wrote:
Date: Fri, 27 Aug 2010 14:27:34 -0400
From: da...@ieee.org
To: rwob...@hotmail.com
CC: alan.ga...@btinternet.com; tutor@python.org
Subject: Re: [Tutor] exercise problem
<snip>
The other problem is you're confusing the variables inside the function
with the ones declared outside. While you're learning, you should use
different names for the two sets of variables. So create a new variable
inside the function, called something like result. Give it an initial
value, a list of the desired size. Then assign to one of its elements
each time through the loop. And don't forget to change the return
statement to return that variable instead of the confused-named one.
DaveA
Hello,
I put in right after getal1 =
I have tried another solution nl.
Put every outcome in a string.
Then convert the string into a list like this :
def add_vectors(u, v):
"""
>>> add_vectors([1, 0], [1, 1])
[2, 1]
>>> add_vectors([1, 2], [1, 4])
[2, 6]
>>> add_vectors([1, 2, 1], [1, 4, 3])
[2, 6, 4]
>>> add_vectors([11, 0, -4, 5], [2, -4, 17, 0])
[13, -4, 13, 5]
"""
teller=0
getal1=0
uitkomst=""
while teller < len(u):
getal1 = u[teller] + v[teller]
uitkomst = uitkomst + str(getal1)
teller=teller+1
uitkomst2 = list(uitkomst)
return uitkomst2
uitkomst= []
uitkomst2=[]
vector= [1, 2, 1], [1, 4, 3]
v=vector[0]
u=vector[1]
uitkomst = add_vectors(u,v)
print uitkomst
But then I get a list of string instead of integers.
You're close. Now that you've initialized the result variable to [],
you can use + just as you're doing. Just take out the str() function in
that line. You've still got duplicate names there between that function
and the outer level code.
There's also no need to convert uitkomst to a list, since it already is.
DaveA
_______________________________________________
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
