Antoon Pardon wrote:
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?
def safeset(dct, key, value):
if key not in dct:
raise KeyError(key)
else:
dct[key] = value
def make(dct, key, value):
if key in dct:
raise KeyError('%r already in dict' % key)
else:
dct[key] = value
I don't see a good reason to make these built in to dict type.
--
Robert Kern
[EMAIL PROTECTED]
"In the fields of hell where the grass grows high
Are the graves of dreams allowed to die."
-- Richard Harter
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