This is pretty simple but I'd love a pretty, pythonic way of doing it. Basically, given a dictionary, return the subdictionary that contains only those keys that start with a certain string.
» d = {'Apple': 1, 'Banana': 9, 'Carrot': 6, 'Baboon': 3, 'Duck': 8, 'Baby': 2}
» print slice(d, 'Ba')
{'Banana': 9, 'Baby': 2, 'Baboon': 3}
This is fairly simple to do with a function:
def slice(sourcedict, string):
newdict = {}
for key in sourcedict.keys():
if key.startswith(string):
newdict[key] = sourcedict[key]
return newdict
But surely there is a nicer, cleverer, more readable solution? Could a generator help here? (I never have enough opportunities to use those).
How about this:
in python 2.x :
def slicedict(d, s):
return {k:v for k,v in d.iteritems() if k.startswith(s)}
In python 3.x :
def slicedict(d, s):
return {k:v for k,v in d.items() if k.startswith(s)}