Working with dates : complex problem

Thu May 24 03:31:40 EDT 2012

Hi,
I've a list of python objects with dates attributes. This list is ordered
by one of these date. Elements mandatory follow each other :
Element #1 Element #2 Element #3
|-------------------------|--------------|--------------------------|

Now, I want to "insert" an element in this timeline. This imply that I will
have to resize some elements :
Element #1 Element #2 Element #3
|-------------------------|--------------|--------------------------|
 New element
 |----------------------|
And after resize :
Element #1 New element Element #2 Element #3
|---------|----------------------|---------|--------------------------|

 |----------------------|
My question is the following : how can I know (easily) which elements my
"New element" is "over", which,
in my example would have returned ['Element #1', 'Element #2'].
Elements objets are simple Python objects with dates :
obj.begin = datetime()
obj.end = datetime()
I'm looking for the more Pythonic way to handle this problem, thanks !
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