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Groups > comp.lang.python > #7519
| References | <3ff2f4cc-7c26-4f59-9463-d6f0874174d8@dn9g2000vbb.googlegroups.com> |
|---|---|
| Date | 2011-06-14 01:09 +1000 |
| Subject | Re: What is the most efficient way to compare similar contents in two lists? |
| From | Chris Angelico <rosuav@gmail.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.169.1307977750.11593.python-list@python.org> (permalink) |
On Tue, Jun 14, 2011 at 12:58 AM, Zachary Dziura <zcdziura@gmail.com> wrote: > if set(source_headers) == set(target_headers): > similar_headers = len(source_headers) Since you're making sets already, I'd recommend using set operations - same_headers is the (length of the) intersection of those two sets, and different_headers is the XOR. # If you need the lists afterwards, use different variable names source_headers = set(source_headers) target_headers = set(target_headers) similar_headers = len(source_headers & target_headers) different_headers = len(source_headers ^ target_headers) Chris Angelico
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What is the most efficient way to compare similar contents in two lists? Zachary Dziura <zcdziura@gmail.com> - 2011-06-13 07:58 -0700
Re: What is the most efficient way to compare similar contents in two lists? Chris Angelico <rosuav@gmail.com> - 2011-06-14 01:09 +1000
Re: What is the most efficient way to compare similar contents in two lists? Zachary Dziura <zcdziura@gmail.com> - 2011-06-13 08:21 -0700
Re: What is the most efficient way to compare similar contents in two lists? Chris Angelico <rosuav@gmail.com> - 2011-06-14 01:39 +1000
Re: What is the most efficient way to compare similar contents in two lists? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-06-13 16:04 +0000
Re: What is the most efficient way to compare similar contents in two lists? Chris Angelico <rosuav@gmail.com> - 2011-06-14 02:30 +1000
Re: What is the most efficient way to compare similar contents in two lists? geremy condra <debatem1@gmail.com> - 2011-06-13 10:46 -0700
Re: What is the most efficient way to compare similar contents in two lists? Chris Angelico <rosuav@gmail.com> - 2011-06-14 03:50 +1000
Re: What is the most efficient way to compare similar contents in two lists? geremy condra <debatem1@gmail.com> - 2011-06-13 11:20 -0700
Re: What is the most efficient way to compare similar contents in two lists? Chris Angelico <rosuav@gmail.com> - 2011-06-14 04:24 +1000
Re: What is the most efficient way to compare similar contents in two lists? Ethan Furman <ethan@stoneleaf.us> - 2011-06-13 12:11 -0700
Re: What is the most efficient way to compare similar contents in two lists? Zachary Dziura <zcdziura@gmail.com> - 2011-06-13 12:21 -0700
Re: What is the most efficient way to compare similar contents in two lists? Chris Angelico <rosuav@gmail.com> - 2011-06-14 07:33 +1000
Re: What is the most efficient way to compare similar contents in two lists? Chris Angelico <rosuav@gmail.com> - 2011-06-14 04:11 +1000
Re: What is the most efficient way to compare similar contents in two lists? Chris Torek <nospam@torek.net> - 2011-06-13 18:40 +0000
Re: What is the most efficient way to compare similar contents in two lists? Chris Angelico <rosuav@gmail.com> - 2011-06-14 04:12 +1000
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