Re: [Tutor] changing dictionary to lowercase
It would be nice to generalize the solution so it could also handle
definitions={Deprecated: No longer in use, DEPRECATED: No longer in
use}
These are unique now, but after turning them into lower case not anymore.
new_d = {}
for d in definitions:
try:
new_d[d.lower()].append(definitions[d])
except TypeError:
new_d[d.lower()] = [definitions[d]]
Cheers!!
Albert-Jan
~~
All right, but apart from the sanitation, the medicine, education, wine, public
order, irrigation, roads, a fresh water system, and public health, what have
the Romans ever done for us?
~~
From: Joel Goldstick joel.goldst...@gmail.com
To: tutor@python.org
Sent: Thursday, October 27, 2011 8:36 PM
Subject: Re: [Tutor] changing dictionary to lowercase
On Thu, Oct 27, 2011 at 2:25 PM, ADRIAN KELLY kellyadr...@hotmail.com wrote:
Hi all,
is it possible to change a dictionary list to lowercase..without having to
retype?
e.g. definitions={Deprecated: No longer in use, Depreciation: fall in
value of an asset}
i have tried definitions=definitions.lower()
regards
adrian
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There is a string method called lower so 'Bob'.lower() will return 'bob'
You can't alter the keys in a dictionary because they are immutable -- they
can't be changed
But you can loop through your dictionary, make new keys lowercase and copy the
values associated with each key
like this:
new_d = {}
for d in definitions:
... new_d[d.lower()] = definitions[d]
...
new_d
{'deprecated': 'No longer in use', 'depreciation': 'fall in value of an asset'}
--
Joel Goldstick
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Re: [Tutor] changing dictionary to lowercase
On 2011/10/28 11:51 AM, Albert-Jan Roskam wrote:
It would be nice to generalize the solution so it could also handle
definitions={Deprecated: No longer in use, DEPRECATED: No
longer in use}
These are unique now, but after turning them into lower case not anymore.
new_d = {}
for d in definitions:
try:
new_d[d.lower()].append(definitions[d])
except TypeError:
new_d[d.lower()] = [definitions[d]]
Cheers!!
Albert-Jan
snip
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To save yourself the try/except you can use defaultdict which is part of
the collections module.
from collections import defaultdict
new_d = defaultdict(list)
for key, value in definitions.iteritems():
new_d[key.lower()].append(value)
--
Christian Witts
Python Developer
//
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Re: [Tutor] changing dictionary to lowercase
Always reply-all so a copy goes to the tutor list.
Always put your responses following the question rather than at the top
of the email.
On 10/28/2011 8:28 AM, Adrian wrote:
Thats the original alright bob, id like to change keys to lowercase
Thanks
Adrian
Sent from my iPad
On 27 Oct 2011, at 22:49, bob gailer bgai...@gmail.com
mailto:bgai...@gmail.com wrote:
On 10/27/2011 2:25 PM, ADRIAN KELLY wrote:
Hi all,
is it possible to change a dictionary list to lowercase..without
having to retype?
e.g. definitions={Deprecated: No longer in use, Depreciation:
fall in value of an asset}
There seems to be some confusion both in the question and the
proposed solutions regarding lowercase.
Re your e.g. - is that the original or the result?
It's best to show both.
I have to assume that your e.g. is the original since it contains
upper case letters.
Do you want to change the case of the keys, values or both?
--
Bob Gailer
919-636-4239
Chapel Hill NC
--
Bob Gailer
919-636-4239
Chapel Hill NC
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Re: [Tutor] changing dictionary to lowercase
Ok boss point noted
Sent from my iPad
On 28 Oct 2011, at 19:05, bob gailer bgai...@gmail.com wrote:
Always reply-all so a copy goes to the tutor list.
Always put your responses following the question rather than at the top of
the email.
On 10/28/2011 8:28 AM, Adrian wrote:
Thats the original alright bob, id like to change keys to lowercase
Thanks
Adrian
Sent from my iPad
On 27 Oct 2011, at 22:49, bob gailer bgai...@gmail.com wrote:
On 10/27/2011 2:25 PM, ADRIAN KELLY wrote:
Hi all,
is it possible to change a dictionary list to lowercase..without having to
retype?
e.g. definitions={Deprecated: No longer in use, Depreciation: fall
in value of an asset}
There seems to be some confusion both in the question and the proposed
solutions regarding lowercase.
Re your e.g. - is that the original or the result?
It's best to show both.
I have to assume that your e.g. is the original since it contains upper
case letters.
Do you want to change the case of the keys, values or both?
--
Bob Gailer
919-636-4239
Chapel Hill NC
--
Bob Gailer
919-636-4239
Chapel Hill NC
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[Tutor] changing dictionary to lowercase
Hi all,
is it possible to change a dictionary list to lowercase..without having to
retype?
e.g. definitions={Deprecated: No longer in use, Depreciation: fall in
value of an asset}
i have tried definitions=definitions.lower()
regards
adrian
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Re: [Tutor] changing dictionary to lowercase
On 27-Oct-11 11:25, ADRIAN KELLY wrote:
Hi all,
is it possible to change a dictionary list to lowercase..without having
to retype?
e.g. definitions={Deprecated: No longer in use, Depreciation:
fall in value of an asset}
i have tried definitions=definitions.lower()
lower() is not a dictionary method, it's a string method (i.e.,
dictionaries have no idea how to lowercase themselves, but strings do).
So what you need to do is iterate over the list of dictionary members
and re-create a new dictionary with lowercased versions of the strings
(that's easier than changing the dictionary in-place, especially if
you're lowercasing the keys, since keys are immutable--you'd have to
delete the old one and re-store the data under the lowercased key anyway)
There are several ways to do that, including loops and list comprehensions.
Does that nudge you in the right direction?
If you're still stuck, let us know.
--steve
--
Steve Willoughby / st...@alchemy.com
A ship in harbor is safe, but that is not what ships are built for.
PGP Fingerprint 4615 3CCE 0F29 AE6C 8FF4 CA01 73FE 997A 765D 696C
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Re: [Tutor] changing dictionary to lowercase
On Thu, Oct 27, 2011 at 2:25 PM, ADRIAN KELLY kellyadr...@hotmail.comwrote:
Hi all,
is it possible to change a dictionary list to lowercase..without having to
retype?
e.g. definitions={Deprecated: No longer in use, Depreciation: fall
in value of an asset}
i have tried definitions=definitions.lower()
regards
adrian
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There is a string method called lower so 'Bob'.lower() will return 'bob'
You can't alter the keys in a dictionary because they are immutable -- they
can't be changed
But you can loop through your dictionary, make new keys lowercase and copy
the values associated with each key
like this:
new_d = {}
for d in definitions:
... new_d[d.lower()] = definitions[d]
...
new_d
{'deprecated': 'No longer in use', 'depreciation': 'fall in value of an
asset'}
--
Joel Goldstick
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Re: [Tutor] changing dictionary to lowercase
On 10/27/2011 2:25 PM, ADRIAN KELLY wrote:
Hi all,
is it possible to change a dictionary list to lowercase..without
having to retype?
e.g. definitions={Deprecated: No longer in use, Depreciation:
fall in value of an asset}
There seems to be some confusion both in the question and the proposed
solutions regarding lowercase.
Re your e.g. - is that the original or the result?
It's best to show both.
I have to assume that your e.g. is the original since it contains upper
case letters.
Do you want to change the case of the keys, values or both?
--
Bob Gailer
919-636-4239
Chapel Hill NC
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Re: [Tutor] changing dictionary to lowercase
On 27/10/11 19:25, ADRIAN KELLY wrote:
is it possible to change a dictionary list to lowercase..without having
to retype?
e.g. definitions={Deprecated: No longer in use, Depreciation:
fall in value of an asset}
You've posted a few similar type questions lately that look suspiciously
like homework exercises. If that is the case we are still happy to help
but we try to avoid giving you the answer directly.
And we do like to see what you have tried first.
i have tried definitions=definitions.lower()
Thats a start but as you found out doesn't even execute.
Others have suggested some options but it would help us if you tell us
which version of Python you are using because Python 3 offers some
different mechanisms to Python v2. (You can tell us the OS too for
completeness but it probably doesn't make much difference for the
questions you have been asking)
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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