[EMAIL PROTECTED] wrote:
(top-post corrected)
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] n.org]On Behalf Of G. Völkl Sent: Thursday, March 10, 2005 12:19 PM To: python-list@python.org Subject: newbie: dictionary - howto get key value
Hello,
I use a dictionary:
phone = {'mike':10,'sue':8,'john':3}
phone['mike'] --> 10
I want to know who has number 3?
3 --> 'john'
How to get it in the python way ?
how about?
test = 3 #find person with this number for x in xrange(len(phone.keys())): print x if phone[phone.keys()[x]] == test: print phone.keys()[x] break
Being a newbie myself, I'd love a little critique on the above.
0/ does not retrieve all the information (just the first match) 1/ not reusable (hint : make it a function) 2/ does not retrieve the information, just print it 3/ also print some useless informations ('print x') 4/ makes len(phone.keys()) + 1 calls to phone.keys() hint : for key in phone.keys(): if phone[key] == test: print phone[key] or better: for key, value in phone.items(): if value == test: print key
Be kind as
I don't know what else needs to be done in Gerhard's process.
Hope I haven't been to harsh !-)
Of course, we could put this loop in a call and return the name
yeps.
--
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for p in '[EMAIL PROTECTED]'.split('@')])"
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