Marc 'BlackJack' Rintsch wrote:
> On Sun, 29 Jul 2007 12:24:56 -0700, CC wrote:
>>The next step consists of printing out the ASCII printable characters.
>>I have devised the following silliness:
>>
>>printable = '
>>[EMAIL PROTECTED]&8*9(0)aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ\
>>`~-_=+\\|[{]};:\'",<.>/?'
>
> I'd use `string.printable` and remove the "invisible" characters like '\n'
> or '\t'.
What is `string.printable` ? There is no printable method to strings,
though I had hoped there would be. I don't yet know how to make one.
>>for c in ln:
>> if c in printable: sys.stdout.write(c)
>> else: sys.stdout.write('.')
> The translation table can be created once and should be faster.
I suppose the way I'm doing it requires a search through `printable` for
each c, right? Whereas the translation would just be a lookup
operation? If so then perhaps the translation would be better.
>>I'd like to display the non-printable characters differently, since they
>>can't be distinguished from genuine period '.' characters. Thus, I may
>>use ANSI escape sequences like:
>>
>>for c in ln:
>> if c in printable: sys.stdout.write(c)
>> else:
>> sys.stdout.write('\x1B[31m.')
>> sys.stdout.write('\x1B[0m')
>>
>>print
>
> `re.sub()` might be an option here.
Yeah, that is an interesting option. Since I don't wish to modify the
block of data unless the user specifically edits it, so I might prefer
the simple display operation.
> For escaping:
>
> In [90]: '\n'.encode('string-escape')
> Out[90]: '\\n'
Hmm, I see there's an encoder that can do my hex display too.
Thanks for the input!
--
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Christopher R. Carlen
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SuSE 9.1 Linux 2.6.5
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