James Stroud wrote:
> Cruella DeVille wrote:
>
>>I'm trying to implement a bookmark-url program, which accepts user
>>input and puts the strings in a dictionary. Somehow I'm not able to
>>iterate myDictionary of type Dict{}
>>
>>When I write print type(myDictionary) I get that the type is
>>"instance", which makes no sense to me. What does that mean?
>>Thanks
>>
>
>
> Perhaps you did not know that you can inheret directly from dict, which
> is the same as {}. For instance:
>
> class Dict({}):
> pass
>
> Is the same as
>
> class Dict(dict):
> pass
>
With the minor exception that the second is valid Python, while the
first isn't:
>>> class Dict({}):
... pass
...
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: Error when calling the metaclass bases
dict expected at most 1 arguments, got 3
>>>
It's quite an interesting error message, though ;-)
> Now Dict can do everything that dict ({}) can do, but you can also
> specialize it:
>
> py> class Dict(dict):
> ... def __str__(self):
> ... return "I am %s long. But you should read the tutorial!" % len(self)
> ...
> py> d = Dict()
> py> d['a'] = 1
> py> d['b'] = 2
> py>
> py> d['a']
> 1
> py> d['b']
> 2
> py> print d
> I am 2 long. But you should read the tutorial!
>
You're right about that, but we all need a helping hand now and then ...
regards
Steve
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