Pesky reverse()

[Elaine Jackson]

>>> list1=[1,2,3]
>>> list2=list1[:]   ##  "cloning"
>>> list1.reverse()==None
1
>>> list1
[3, 2, 1]
>>> list2
[1, 2, 3]


<engsolnom at ipns.com> wrote in message
news:3t3svvs7ni8l8jnn1l1v60oogirqoaa85f at 4ax.com...
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| I need to use the built-in method 'reverse', but notice strange behavior.
| Foe example:
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| print my_list.reverse()  doesn't work.
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| new_list = my_list.reverse() doesn't work.
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| my_list.reverse()
| print my_list does work. (displays reversed list)
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| But  I want both a 'forward' and 'reverse' list:
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| new_list = my+list  # should save a 'forward' copy, right? Nope
| my_list.reverse() actually reverses both copies, since Python is a bit too
| helpful sometimes, and I understand why.
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| So the question is, how do I get a forward and reverse list?
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| Thanks......Norm.
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|