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shutil ignore fails on passing a tuple?

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  shutil ignore fails on passing a tuple? "Alex van der Spek" <zdoor@xs4all.nl> - 2012-07-19 18:43 +0200
    RE: shutil ignore fails on passing a tuple? "Prasad, Ramit" <ramit.prasad@jpmorgan.com> - 2012-07-19 16:52 +0000
    Re: shutil ignore fails on passing a tuple? Joel Goldstick <joel.goldstick@gmail.com> - 2012-07-19 12:55 -0400
    Re: shutil ignore fails on passing a tuple? Dave Angel <d@davea.name> - 2012-07-19 15:20 -0400

#25632 — shutil ignore fails on passing a tuple?

This beats me:
++++++++++++++++++++
>>> ipatterns
('*.txt', '*.hdf', '*.pdf', '*.png')
>>> igf = shutil.ignore_patterns(ipatterns)
>>> ignorethis = igf(ddftopdir,os.listdir(ddftopdir))

Traceback (most recent call last):
  File "<pyshell#60>", line 1, in <module>
    ignorethis = igf(ddftopdir,os.listdir(ddftopdir))
  File "C:\Python27\lib\shutil.py", line 138, in _ignore_patterns
    ignored_names.extend(fnmatch.filter(names, pattern))
  File "C:\Python27\lib\fnmatch.py", line 49, in filter
    pat=os.path.normcase(pat)
  File "C:\Python27\lib\ntpath.py", line 46, in normcase
    return s.replace("/", "\\").lower()
AttributeError: 'tuple' object has no attribute 'replace'

>>> igg = shutil.ignore_patterns('*.txt', '*.hdf', '*.pdf', '*.png')
>>> ignorethat = igg(ddftopdir, os.listdir(ddftopdir))
>>> ignorethat
set(['Chi2.png', 'DTSdata.hdf', 'TST.hdf', 'BullNoseDiffs.png', 
'DTSall.hdf', 'Symmetry.pdf'])
>>>
++++++++++++++++++++++++++++
Why does it fail on passing in a tuple of ignore strings? I thought the , 
(comma) is pretty much the tuple constructor (if that is the right word).

How can I solve this? Is there a way to convert a tuple of strings in a form 
that will be accepted?

Thank you in advance,
Alex van der Spek

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#25633

> >>> ipatterns
> ('*.txt', '*.hdf', '*.pdf', '*.png')
> >>> igf = shutil.ignore_patterns(ipatterns)
> >>> ignorethis = igf(ddftopdir,os.listdir(ddftopdir))
> 
> Traceback (most recent call last):
>   File "<pyshell#60>", line 1, in <module>
>     ignorethis = igf(ddftopdir,os.listdir(ddftopdir))
>   File "C:\Python27\lib\shutil.py", line 138, in _ignore_patterns
>     ignored_names.extend(fnmatch.filter(names, pattern))
>   File "C:\Python27\lib\fnmatch.py", line 49, in filter
>     pat=os.path.normcase(pat)
>   File "C:\Python27\lib\ntpath.py", line 46, in normcase
>     return s.replace("/", "\\").lower()
> AttributeError: 'tuple' object has no attribute 'replace'
> 
> >>> igg = shutil.ignore_patterns('*.txt', '*.hdf', '*.pdf', '*.png')
> >>> ignorethat = igg(ddftopdir, os.listdir(ddftopdir))
> >>> ignorethat
> set(['Chi2.png', 'DTSdata.hdf', 'TST.hdf', 'BullNoseDiffs.png',
> 'DTSall.hdf', 'Symmetry.pdf'])
> >>>
> ++++++++++++++++++++++++++++
> Why does it fail on passing in a tuple of ignore strings? I thought the ,
> (comma) is pretty much the tuple constructor (if that is the right word).
> 
> How can I solve this? Is there a way to convert a tuple of strings in a form
> that will be accepted?
>

Untested, but I think it should work.
igf = shutil.ignore_patterns(*ipatterns)

Ramit

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#25634

On Thu, Jul 19, 2012 at 12:43 PM, Alex van der Spek <zdoor@xs4all.nl> wrote:
> This beats me:
> ++++++++++++++++++++
>>>>
>>>> ipatterns
>
> ('*.txt', '*.hdf', '*.pdf', '*.png')
>>>>
>>>> igf = shutil.ignore_patterns(ipatterns)
>>>> ignorethis = igf(ddftopdir,os.listdir(ddftopdir))
>
>
> Traceback (most recent call last):
>  File "<pyshell#60>", line 1, in <module>
>    ignorethis = igf(ddftopdir,os.listdir(ddftopdir))
>  File "C:\Python27\lib\shutil.py", line 138, in _ignore_patterns
>    ignored_names.extend(fnmatch.filter(names, pattern))
>  File "C:\Python27\lib\fnmatch.py", line 49, in filter
>    pat=os.path.normcase(pat)
>  File "C:\Python27\lib\ntpath.py", line 46, in normcase
>    return s.replace("/", "\\").lower()
> AttributeError: 'tuple' object has no attribute 'replace'

What is s?  It needs to be a string.  If s is a tuple with string
values, you will have to iterate over each to replace.  Or I believe
you could use map.
>
>>>> igg = shutil.ignore_patterns('*.txt', '*.hdf', '*.pdf', '*.png')
>>>> ignorethat = igg(ddftopdir, os.listdir(ddftopdir))
>>>> ignorethat
>
> set(['Chi2.png', 'DTSdata.hdf', 'TST.hdf', 'BullNoseDiffs.png',
> 'DTSall.hdf', 'Symmetry.pdf'])
>>>>
>>>>
> ++++++++++++++++++++++++++++
> Why does it fail on passing in a tuple of ignore strings? I thought the ,
> (comma) is pretty much the tuple constructor (if that is the right word).
>
> How can I solve this? Is there a way to convert a tuple of strings in a form
> that will be accepted?
>
> Thank you in advance,
> Alex van der Spek
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list



-- 
Joel Goldstick

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#25645

On 07/19/2012 12:43 PM, Alex van der Spek wrote:
> This beats me:
> ++++++++++++++++++++
>>>> ipatterns
> ('*.txt', '*.hdf', '*.pdf', '*.png')
>>>> igf = shutil.ignore_patterns(ipatterns)
>>>> ignorethis = igf(ddftopdir,os.listdir(ddftopdir))
>
> <SNIP>
> Why does it fail on passing in a tuple of ignore strings? I thought
> the , (comma) is pretty much the tuple constructor (if that is the
> right word).
>

ignore_patterns() is not looking for a tuple, it's looking for one or
more strings, as separate arguments.  If you already have the tuple, you
can expand it by using the asterisk, as Prasad ha pointed out.

igf = shutil.ignore_patterns(*ipatterns)

-- 

DaveA

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