Hi,
I wrote this small example to illustrate the usage of lists:
even=[]
odd=[]
for i in range(1,10):
if i%2:
odd.append(i)
else:
even.append(i)
print "odd: "+str(odd)
print "even: "+str(even)
numbers=even
numbers.extend(odd)
print "numbers:"+str(numbers)
numbers.sort()
print "sorted numbers:"+str(numbers)
any comment, suggestion? Is there something not elegant?
Thnx
PAolo 5 1164
No substantive problems. The str() calls are unnecessary, print calls
list.__str__ already. You can replace the loop with list comprehensions or
slices. Same result, a bit more succinct. See these pages for more: http://docs.python.org/lib/typesseq.html http://docs.python.org/tut/node7.html (section 5.1.4)
PAolo wrote: Hi, I wrote this small example to illustrate the usage of lists:
even=[] odd=[]
for i in range(1,10): if i%2: odd.append(i) else: even.append(i)
print "odd: "+str(odd) print "even: "+str(even)
numbers=even numbers.extend(odd) print "numbers:"+str(numbers) numbers.sort() print "sorted numbers:"+str(numbers)
any comment, suggestion? Is there something not elegant?
Thnx PAolo
PAolo wrote: any comment, suggestion? Is there something not elegant?
Try this:
even = range(10)[0::2]
odd = range(10)[1::2]
PAolo>any comment, suggestion? Is there something not elegant?<
Here you can see many little differences, some of them reflect just my
style, but some other of them are Python standard style guidelines:
even = []
odd = []
for i in xrange(1, 10):
if i % 2:
odd.append(i)
else:
even.append(i)
print "Odd:", odd
print "Even:", even
numbers = even + odd
print "Numbers:", numbers
numbers.sort()
print "Sorted numbers:", numbers
There are surely more compact versions of that, but compactness is
usually less important than clarity, expecially for someone that is
learning Python.
This is a more compact version (with the suggestion by Wojciech Mula,
modified in two ways):
even = range(1, 10)[1::2]
odd = range(1, 10)[0::2]
print "Odd:", odd
print "Even:", even
numbers = even + odd
print "Numbers:", numbers
print "Sorted numbers:", sorted(numbers)
Bye,
bearophile
2006/4/22, Edward Elliott <no****@127.0.0.1>: No substantive problems. The str() calls are unnecessary, print calls list.__str__ already. You can replace the loop with list comprehensions or slices. Same result, a bit more succinct. See these pages for more:
http://docs.python.org/lib/typesseq.html http://docs.python.org/tut/node7.html (section 5.1.4)
Thnx, I didn't catch the use of colon in print...
Thanks to the other posting, but actually I want to write some code
that one can modify to his own needings
PAolo
"PAolo" <pa***********@gmail.com> wrote in message
news:11**********************@i40g2000cwc.googlegr oups.com... for i in range(1,10): if i%2: odd.append(i) else: even.append(i)
In 2.5 you'll be able to say
for i in range(1,10):
(odd if i%2 else even).append(i)
Whether you want to do this is another question entirely, of course. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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