missing? dictionary methods

[Antoon Pardon]

Well at least I find them missing.

For the moment I frequently come across the following cases.

1) Two files, each with key-value pairs for the same dictionary.
However it is an error if the second file contains a key that
was not in the first file.

In treating the second file I miss a 'set' method.
dct.set(key, value) would be equivallent to dct[key] = value,
except that it would raise a KeyError if the key wasn't
already in the dictionary.


2) One file with key-value pairs. However it is an error
if a key is duplicated in the file.

In treating such files I miss a 'make' method.
dct.make(key, value) would be equivallent to dct[key] = value.
except that it would raise a KeyError if the key was
already in the dictionary.


What do other people think about this?

-- 
Antoon Pardon