Enumerate registered codecs

[Paul Watson]

John Machin wrote:
> Paul Watson wrote:
> 
>> I see the list of standard encodings in Python 2.4.1 documentation 
>> section 4.9.2.
>>
>> Is there a method to enumerate the registered codecs at runtime?
> 
> This has been asked before, within the last couple of months AFAIR. Use 
> Google to search for codec(s) in this newsgroup in Google groups.
> 
> Basically the answer was no. What's your use case?

I need to report the encodings supported.  When the user does not enter 
a required encoding or enters an invalid encoding, we need to tell them 
which encodings are valid and how they are specified.  In an embedded 
environment I would be concerned that some or most might have been left 
out to save space/size/time.

The primary identifier and a descriptive string (localized) need to be 
available at a minimum.  Having aliases would be a plus.