Nested Dicts

[MRAB]

Victor Subervi wrote:
> Hi;
> I have the following error:
> 
>  /var/www/html/angrynates.com/cart/catTree.py 
> <http://angrynates.com/cart/catTree.py> in 
> getChildren(levelDict={'cat3': {}}, level=0)
>    23   if level > MAXLEVEL:
>    24     return  #possibly the data has a cycle/loop
>    25   for (nm, dt) in levelDict: ### ERROR HERE
>    26     cursor.execute('''select c.name <http://c.name> from 
> categories as c
>    27       inner join relationship as r
> nm undefined, dt undefined, levelDict = {'cat3': {}}
> 
> ValueError: too many values to unpack
>       args = ('too many values to unpack',)
> 
> However...
> 
>  >>> d = {'cat': {'one':'two'}}
>  >>> for a, b in d:
> ...
>   File "<stdin>", line 2
> 
>     ^
> IndentationError: expected an indented block
>  >>> d = {'cat': {}}
>  >>> for a, b in d:
> ...
>   File "<stdin>", line 2
> 
>     ^
> IndentationError: expected an indented block
>  >>>
> 
> So apparently, if either the nested dict is populated or not doesn't 
> seem to throw any errors in the interpreter. What, then, is the nature 
> of this error?
> 
When you iterate through a dict, it yields the keys. It's all in the
documentation.