solutions from class yesterday

[Tim Menzies]

def item(x) :
if isinstance(x,(tuple,list)):
for y in x:
for z in item(y): yield z
else: yield x

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[cschaozhang]

def item(x):

   if isinstance(x, (tuple,list)):

       for y in item(x): yield y

   else: yield x

I guess this works.

[Tim Menzies]

er... not quite. your solution suffers from the problem mentioned in class: you are recursing on the passed-in argument with no modification. so you code recurses infinitely till it runs of of stack.

on the other hand, my version recurses on items from all y items within the  passed-in list

def item(x) :
  if isinstance(x,(tuple,list)):
    for y in x:
      for z in item(y): yield z
  else: yield x

t

[cschaozhang]

def item(x):

    for a in x:

        if isinstance(a, list):

            for b in item(a): yield b

        else:

            yield a

made a mistake: forgot "for a in x"

thanks.

On Friday, February 21, 2014 2:02:13 PM UTC-5, tim.menzies wrote:

[Tim Menzies]

that works.... unless the *first* thing passed-in is not a list

t

[Cameron Meador]

Hello,
Sorry this is really short notice, but i just walked out to my car a few minutes ago and it wouldn't start so I'm not sure if I'll be able to make it I the midterm in time to finish. Can I please schedule a makeup sometime today or tomorrow. As I'm not sure when I'll be able to get my car running or find a ride. Thanks.

Sent from my iPhone

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