[Chicago] Perl Follow-up

[Dan Krol]

For ROT13 encryption/decryption, I'd say:

lc = string.ascii_lowercase
uc = string.ascii_uppercase
transtab = string.maketrans (lc + uc, lc[13:] + lc[:13] + uc[13:] + uc[:13])


On Fri, Mar 12, 2010 at 1:05 PM, Jonathan Hayward <
christos.jonathan.hayward at gmail.com> wrote:

>
>
> On Fri, Mar 12, 2010 at 1:05 PM, Jonathan Hayward <
> christos.jonathan.hayward at gmail.com> wrote:
>
>> Someone said that Python *does* have a switch statement; it's the
>> dictionary.
>>
>> One way to do translations would seem to be:
>>
>> function transpose(input, translations = {'T': 'A', 'A': 'T', 'C': 'G',
>> 'G': C'}):
>>     result = []
>>     for character in input:
>>         if character in translations:
>>             result.append(translations[character])
>>         else:
>>             result.append(character)
>>    return "".join(result)
>>
>
> Left out a return statement.
>
>
>> But it looks like Alex Gaynor found an "It's already solved in the
>> standard library" approach, so I'd vote for his solution.
>>
>> On Fri, Mar 12, 2010 at 12:54 PM, Clyde Forrester <
>> clydeforrester at gmail.com> wrote:
>>
>>> I raised some issues about Perl vs. Python, and I'd like to invite some
>>> comment and advice.
>>>
>>> First, can anyone recommend a properly Pythonic way of doing
>>> translations?
>>>
>>> One example of such translations would be complementing DNA sequences.
>>> Translating T to A, A to T, C to G, and G to C.
>>>
>>> Another example would be ROT-13 encryption and decryption.
>>>
>>> Second, where does one properly look for Python resources such as
>>> programming examples?
>>>
>>> Third, if I forgot an important question, go ahead and answer it anyway.
>>>
>>> Finally, I left out an anecdote about regular expressions: Someone
>>> recently posted a Perl data-parsing problem using regular expressions. Many
>>> things were suggested and tried. Nothing quite worked. Finally, I suggested
>>> that since the data seemed to be in fixed columns, that substrings should be
>>> used instead of pattern matching. It seems to have worked. (Oh, but.. but..
>>> but regex is so wicked cool!)
>>>
>>> c4
>>> _______________________________________________
>>> Chicago mailing list
>>> Chicago at python.org
>>> http://mail.python.org/mailman/listinfo/chicago
>>>
>>
>>
>>
>> --
>> → Jonathan Hayward, a Senior Web Developer who cares deeply about
>> usability
>> → www.linkedin.com/in/jonathanhayward • jonathan.hayward at pobox.com
>> → Ajax, CGI, CMS, CSS, HTML, IA, JSON, JavaScript, LAMP, Linux, Perl, PHP,
>> Python, SQL, UI, Unix, Usability, UX, XHTML, XML
>> → With a good interest in the human side of computing and making software
>> and websites a joy to use
>>
>
>
>
> --
> → Jonathan Hayward, a Senior Web Developer who cares deeply about usability
> → www.linkedin.com/in/jonathanhayward • jonathan.hayward at pobox.com
> → Ajax, CGI, CMS, CSS, HTML, IA, JSON, JavaScript, LAMP, Linux, Perl, PHP,
> Python, SQL, UI, Unix, Usability, UX, XHTML, XML
> → With a good interest in the human side of computing and making software
> and websites a joy to use
>
> _______________________________________________
> Chicago mailing list
> Chicago at python.org
> http://mail.python.org/mailman/listinfo/chicago
>
>
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