Programming Forums > Script Programming > Python

Dietrich · Apr 6th, 2006, 11:32 AM

I want to sort a list of words case insensitive. Is there a good way?

I have:

print "A list of Python builtin methods:"
builtinList = dir(__builtins__)
print builtinList

Arevos · Apr 6th, 2006, 11:36 AM

The sort method in lists allows you to specify a comparison function:

buildinList.sort(lambda a, b : cmp(a.lower(), b.lower()))

Or:

def icmp(a, b):
    return cmp(a.lower(), b.lower())
buildinList.sort(icmp)

Dietrich · Apr 6th, 2006, 12:31 PM

Thanks Arevos,

I was also looking at the new "key=" specifier. Is there something you can enter there to do the trick?

Arevos · Apr 6th, 2006, 12:55 PM

Quote:

Originally Posted by Dietrich

I was also looking at the new "key=" specifier. Is there something you can enter there to do the trick?

Huh. So there is. Didn't know about that one before, but this seems to do the trick:

builtinList.sort(key = str.lower)

Dietrich · Apr 6th, 2006, 11:43 PM

Strange, but it does work! You are a clever person after all!

Apr 6th, 2006, 11:32 AM	#1
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	Case Insensitive Sorting I want to sort a list of words case insensitive. Is there a good way? I have: (Toggle Plain Text) print "A list of Python builtin methods:" builtinList = dir(__builtins__) print builtinList print "A list of Python builtin methods:" builtinList = dir(__builtins__) print builtinList __________________ I looked it up on the Intergnats!

Apr 6th, 2006, 11:36 AM	#2
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	The sort method in lists allows you to specify a comparison function: (Toggle Plain Text) buildinList.sort(lambda a, b : cmp(a.lower(), b.lower())) buildinList.sort(lambda a, b : cmp(a.lower(), b.lower())) Or: (Toggle Plain Text) def icmp(a, b): return cmp(a.lower(), b.lower()) buildinList.sort(icmp) def icmp(a, b): return cmp(a.lower(), b.lower()) buildinList.sort(icmp)

Apr 6th, 2006, 12:31 PM	#3
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	Thanks Arevos, I was also looking at the new "key=" specifier. Is there something you can enter there to do the trick? __________________ I looked it up on the Intergnats!

Apr 6th, 2006, 11:43 PM	#5
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	Strange, but it does work! You are a clever person after all! __________________ I looked it up on the Intergnats!

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Case Insensitive Sorting