determining file type

[Ritesh Raj Sarraf]

Hi,

I have a funtion named unzipper() which does the work of unzipping the
files.

Is there a way I can identify what is the type of the file which'll be
passed to unzipper().
If yes, I'll be able to make out if it's a zip file or a tar or a bz2
file.

Thanks,
Ritesh

[Maric Michaud]

Re: determining file type

Le Mercredi 14 Juin 2006 11:22, Ritesh Raj Sarraf a écrit :[color=blue]
> Hi,
>
> I have a funtion named unzipper() which does the work of unzipping the
> files.
>
> Is there a way I can identify what is the type of the file which'll be
> passed to unzipper().
> If yes, I'll be able to make out if it's a zip file or a tar or a bz2
> file.
>[/color]
Under Linux you can use the file command in a pipe.
In all cases, you use the "magic" repository of the file command directly like
this (I found the '\xff\xd8' for jpeg in /usr/share/file/magic.mime on my
debian)

In [69]: f = file ('samurai_tux.j pg')

In [70]: s = f.read(2)

In [71]: s == '\xff\xd8'
Out[71]: True



[color=blue]
> Thanks,
> Ritesh[/color]

--
_____________

Maric Michaud
_____________

Aristote - www.aristote.info
3 place des tapis
69004 Lyon
Tel: +33 426 880 097

[Ritesh Raj Sarraf]

Re: determining file type

But isn't there any library function ?
Something like
XX.filetype(nam e)
Directory
File-Tar
File-Zip
File-MPEG

Ritesh


Maric Michaud wrote:[color=blue]
> Le Mercredi 14 Juin 2006 11:22, Ritesh Raj Sarraf a écrit :[color=green]
> > Hi,
> >
> > I have a funtion named unzipper() which does the work of unzipping the
> > files.
> >
> > Is there a way I can identify what is the type of the file which'll be
> > passed to unzipper().
> > If yes, I'll be able to make out if it's a zip file or a tar or a bz2
> > file.
> >[/color]
> Under Linux you can use the file command in a pipe.
> In all cases, you use the "magic" repository of the file command directlylike
> this (I found the '\xff\xd8' for jpeg in /usr/share/file/magic.mime on my
> debian)
>
> In [69]: f = file ('samurai_tux.j pg')
>
> In [70]: s = f.read(2)
>
> In [71]: s == '\xff\xd8'
> Out[71]: True
>
>
>
>[color=green]
> > Thanks,
> > Ritesh[/color]
>
> --
> _____________
>
> Maric Michaud
> _____________
>
> Aristote - www.aristote.info
> 3 place des tapis
> 69004 Lyon
> Tel: +33 426 880 097[/color]

[Ritesh Raj Sarraf]

Re: determining file type

Also,
f = file ('some_file.jpg ')

throws an error.
"str object is not callable"

Ritesh

Maric Michaud wrote:[color=blue]
> Le Mercredi 14 Juin 2006 11:22, Ritesh Raj Sarraf a écrit :[color=green]
> > Hi,
> >
> > I have a funtion named unzipper() which does the work of unzipping the
> > files.
> >
> > Is there a way I can identify what is the type of the file which'll be
> > passed to unzipper().
> > If yes, I'll be able to make out if it's a zip file or a tar or a bz2
> > file.
> >[/color]
> Under Linux you can use the file command in a pipe.
> In all cases, you use the "magic" repository of the file command directlylike
> this (I found the '\xff\xd8' for jpeg in /usr/share/file/magic.mime on my
> debian)
>
> In [69]: f = file ('samurai_tux.j pg')
>
> In [70]: s = f.read(2)
>
> In [71]: s == '\xff\xd8'
> Out[71]: True
>
>
>
>[color=green]
> > Thanks,
> > Ritesh[/color]
>
> --
> _____________
>
> Maric Michaud
> _____________
>
> Aristote - www.aristote.info
> 3 place des tapis
> 69004 Lyon
> Tel: +33 426 880 097[/color]

[Diez B. Roggisch]

Re: determining file type

Ritesh Raj Sarraf schrieb:[color=blue]
> Also,
> f = file ('some_file.jpg ')
>
> throws an error.
> "str object is not callable"[/color]

I bet you have rebound "file" to a string, like this:

file = "some name"


And PLEASE don't top-quote:

http://www.redballoon.net/~snorwood/quote-rant.shtml

Diez

[Marc 'BlackJack' Rintsch]

Re: determining file type

In <1150281704.342 529.206640@u72g 2000cwu.googleg roups.com>, Ritesh Raj
Sarraf wrote:
[color=blue]
> Also,
> f = file ('some_file.jpg ')
>
> throws an error.
> "str object is not callable"[/color]

This happens if you rebind names of builtins. In this case to a string.
Don't do that!

In [5]:file
Out[5]:<type 'file'>

In [6]:file = 'foo.txt'

In [7]:file
Out[7]:'foo.txt'

In [8]:file('x')
---------------------------------------------------------------------------
exceptions.Type Error Traceback (most recent call last)

/home/bj/<ipython console>

TypeError: 'str' object is not callable


Ciao,
Marc 'BlackJack' Rintsch

[Maric Michaud]

Re: determining file type

Le Mercredi 14 Juin 2006 12:41, Ritesh Raj Sarraf a écrit :[color=blue]
> Also,
> f = file ('some_file.jpg ')
>
> throws an error.
> "str object is not callable"[/color]
stange, did you define a function named file ?
You can use open instead.

--
_____________

Maric Michaud
_____________

Aristote - www.aristote.info
3 place des tapis
69004 Lyon
Tel: +33 426 880 097

[Sion Arrowsmith]

Re: determining file type

Ritesh Raj Sarraf <riteshsarraf@g mail.com> wrote:[color=blue]
>Also,
>f =3D file ('some_file.jpg ')
>
>throws an error.
>"str object is not callable"[/color]

You know all the times people say in this group "Don't use list
or str or file[HINT] or anything else that shadows a built in as
a variable name"? Now you know why.

--
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___ | "Frankly I have no feelings towards penguins one way or the other"
\X/ | -- Arthur C. Clarke
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[utabintarbo]

Re: determining file type

http://www.demonseed.net/~jp/code/magic.py