[Python-ideas] os.path.isbinary

[Ryan]

I actually got something simple working. It's only been tested on Android:

import re

def isbinary(fpath):
 with open(fpath, 'r') as f:
  data = re.sub(r'(^(\'|\")|(\'|\")$)', '', repr(f.read()).replace('\\n', '\n'))
  binchars = re.findall(r'\\x[0123456789abcdef]{2}', data)
  per = (float(len(binchars)) / float(len(data))) * 100
  if int(per) == 0:
   return True
  else:
   return False

Ryan <rymg19 at gmail.com> wrote:

>That's a pretty good idea. Or it could be like this:
>
>if fh.printable():
>
>It would have an optional argument: the number of bytes to read in.
>Default is 512. So, if we wanted 1024 bytes instead of 512:
>
>if fh.printable(1024):
>
>David Mertz <mertz at gnosis.cx> wrote:
>
>>On Wed, Jul 31, 2013 at 5:42 PM, Chris Angelico <rosuav at gmail.com>
>>wrote:
>>
>>> This sounds more like a job for a file-like object, maybe a subclass
>>>  of file that reads (and buffers) the first 512 bytes, guesses
>>whether
>>> it's text or binary, and then watches everything that goes through
>>> after that and revises its guess later on.
>>
>>
>>Something like:
>>
>>  if fh.read(512).isprintable():
>>      do_the_ascii_stuff(fh)
>>  else:
>>      do_the_bin_stuff(fh)
>>
>>
>>
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>>
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