how to safely extract dict values

[Amit Khemka]

On 7/31/06, David Zaret <dave at zaret.com> wrote:
> i have a dict with a particular key - the values for this key will be
> None, one valid scalar, or a list:
>
>         {mykey, None}
>         {mykey, "foo"}
>         {mykey, ["bar", "baz"]}
>
> let's ignore the None case - in the case of the one or many values, i
> want to suck the values into a list.  here's one way to do this:
>
>              if mydict.has_key(mykey):
>                  vals=[]
>                  _v = mydict[mykey]
>                  if isinstance(_v, types.ListType):
>                      vals.extend(_v)
>                  else:
>                      vals.append(_v)
>                  #   now we can safely iterate through acts
>                 for val in vals:
>                         .....

how about:

vals = []
for val in mydict.values():
   try: vals.extend(val)
   except: vals.append(val)

cheers,
amit.



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Amit Khemka -- onyomo.com
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