>> here's one attempt. (I'm no expert, so wait for better :-)
>> >>> class ModFlagDict(dict):
>> def __init__(self, *args, **kwargs):
>> super(ModFlagDict, self).__init__(*args, **kwargs)
>> self.modified = False
>> def __setitem__(self, key, value):
>>
Steve Holden <[EMAIL PROTECTED]> writes:
> > Make a subclass of dict, or an object containing a dictionary, that
> > has a special __setattr__ method that traps updates and sets that
>
> /__setattr__/__setitem__/ ?
Yes, thinkographical error. Thanks.
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Paul Rubin wrote:
> [EMAIL PROTECTED] writes:
>
>>Still, I'd love to hear how you guys would do it.
>
>
> Make a subclass of dict, or an object containing a dictionary, that
> has a special __setattr__ method that traps updates and sets that
/__setattr__/__setitem__/ ?
regards
Steve
--
Stev
Brian van den Broek <[EMAIL PROTECTED]> writes:
> It's broken in at least one way:
>
> >>> newmd = ModFlagDict(3=4, 1=5)
> SyntaxError: keyword can't be an expression
newmd = ModFlagDict(**{3:4, 1:5})
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On Thu, 12 Jan 2006 03:42:21 -0600,
Brian van den Broek <[EMAIL PROTECTED]> wrote:
> It's broken in at least one way:
newmd = ModFlagDict(3=4, 1=5)
> SyntaxError: keyword can't be an expression
> So, as it stands, no integers, floats, tuples, etc can be keys on
> initialization ...
T
[EMAIL PROTECTED] wrote:
> It's important that I can read the contents of the dict without
> flagging it as modified, but I want it to set the flag the moment I add
> a new element or alter an existing one (the values in the dict are
> mutable), this is what makes it difficult. Because the values
Brian van den Broek said unto the world upon 12/01/06 03:42 AM:
> [EMAIL PROTECTED] said unto the world upon 12/01/06 03:15 AM:
>
>>I can think of several messy ways of making a dict that sets a flag if
>>it's been altered, but I have a hunch that experienced python
>>programmers would probably ha
Should the dict flag when the dict itself has been updated? Or also
when any of the items in the dict has been updated?
Say you have a dict consisting of lists...
The dict should be flagged as modified when an item is added; or when
an item is replaced (you call dict.__setitem__ with a key that a
[EMAIL PROTECTED] said unto the world upon 12/01/06 03:15 AM:
> I can think of several messy ways of making a dict that sets a flag if
> it's been altered, but I have a hunch that experienced python
> programmers would probably have an easier (well maybe more Pythonic)
> way of doing this.
>
> It'
[EMAIL PROTECTED] writes:
> Still, I'd love to hear how you guys would do it.
Make a subclass of dict, or an object containing a dictionary, that
has a special __setattr__ method that traps updates and sets that
modification flag. There are contorted ways the caller can avoid
triggering the flag,
Ideally, I would have made a wrapper to add/delete/modify/read from
the dictionay.
But other than this, one way i can think straight off is to "pickle"
the dict, and to see if the picked object is same as current object.
cheers,
amit.
On 12 Jan 2006 01:15:38 -0800, [EMAIL PROTECTED]
<[EMAIL PROT
I can think of several messy ways of making a dict that sets a flag if
it's been altered, but I have a hunch that experienced python
programmers would probably have an easier (well maybe more Pythonic)
way of doing this.
It's important that I can read the contents of the dict without
flagging it a
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