[Python-Dev] mimetypes patch #554192

[Walter Dörwald]

Barry A. Warsaw wrote:
>>>>>>"WD" == Walter Dörwald <walter@livinglogic.de> writes:
>>>>>
> 
>     WD> Martin v. Loewis and I were discussing whether it would make
>     WD> sense to make the helper method add_type (which is used for
>     WD> adding a mapping between one type and one extension) visible
>     WD> on the module level.
> 
>     WD> Any comments?
> 
> +1 on add_types() being public, but it should probably have a strict
> flag to decide whether to add the new entry to the standard types dict
> or the common types dict.

OK, so we probably need a reverse mapping for common_types too, but 
shouldn't we consider common_types to be fixed?

Maybe we should add a guess_all_types too, so we can handle duplicate 
extensions, i.e.
 >>> mimetypes.guess_all_types(".cdf")
['application/x-cdf', 'application/x-netcdf']

This would of course require to change the initialization of types_map
from a dict constant to many calls to add_type.

Even better would be, if we could assign priorities to the mappings,
so that for e.g. image/jpeg the preferred extension is .jpeg.
Then guess_type() and guess_extension() would return the preferred
mimetype/extension.

Bye,
    Walter Dörwald