matplotlib-users

[Matplotlib-users] savefig not deducing file format

[Giovanni L. C. <jun...@gm...>]

Hi all,
I call savefig by passing to it a file-like object but it appears to not 
get the graphics format right:

f = open('not_a_pdf.pdf', 'w')
plot([1,2,3])
savefig(f)

but it produces a PNG image. Can anybody confirm this? I am on 
matplotlib 0.99.3

Cheers,

Giovanni

[Matplotlib-users] savefig not deducing file format

[Giovanni L. C. <cia...@us...>]

Hi all,
I call savefig by passing to it a file-like object but it appears to not 
get the graphics format right:

f = open('not_a_pdf.pdf', 'w')
plot([1,2,3])
savefig(f)

but it produces a PNG image. Can anybody confirm this? I am on 
matplotlib 0.99.3

Cheers,
-- 
Giovanni L. Ciampaglia
PhD Student
University of Lugano, MACS Lab

Re: [Matplotlib-users] savefig not deducing file format

[Fabrice S. <si...@lm...>]

Le mardi 15 mars 2011 à 11:30 +0100, Giovanni Luca Ciampaglia a écrit :
> Hi all,
> I call savefig by passing to it a file-like object but it appears to not 
> get the graphics format right:
> 
> f = open('not_a_pdf.pdf', 'w')
> plot([1,2,3])
> savefig(f)
> 
> but it produces a PNG image. Can anybody confirm this? I am on 
> matplotlib 0.99.3
> 
> Cheers,

You may give savefig a filename (string 'tmp.pdf') instead of the file
descriptor (file object f), or use the format keyword argument.

Automatic format selection is not handled for file object (as visible in
backend_bases.py:FigureCanvasBase.print_figure method).

-- 
Fabrice 

Re: [Matplotlib-users] savefig not deducing file format

[Giovanni L. C. <jun...@gm...>]

Ah, sorry for the duplicate message!

Cheers,

G

On 15/03/2011 11:30, Giovanni Luca Ciampaglia wrote:
> Hi all,
> I call savefig by passing to it a file-like object but it appears to not
> get the graphics format right:
>
> f = open('not_a_pdf.pdf', 'w')
> plot([1,2,3])
> savefig(f)
>
> but it produces a PNG image. Can anybody confirm this? I am on
> matplotlib 0.99.3
>
> Cheers,

Re: [Matplotlib-users] savefig not deducing file format

[Michael D. <md...@st...>]

It has no way of deducing the file format from the file object.

You need to explicitly pass the format keyword to savefig, e.g.:

   savefig(f, format='pdf')

Mike

On 03/15/2011 07:11 AM, Giovanni Luca Ciampaglia wrote:
> Hi all,
> I call savefig by passing to it a file-like object but it appears to not
> get the graphics format right:
>
> f = open('not_a_pdf.pdf', 'w')
> plot([1,2,3])
> savefig(f)
>
> but it produces a PNG image. Can anybody confirm this? I am on
> matplotlib 0.99.3
>
> Cheers,
>
> Giovanni
>
> ------------------------------------------------------------------------------
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>    


-- 
Michael Droettboom
Science Software Branch
Space Telescope Science Institute
Baltimore, Maryland, USA

Re: [Matplotlib-users] savefig not deducing file format

[Giovanni L. C. <jun...@gm...>]

My fault, I didn't read the docstring properly. Thanks for both replies.

Best,

G

On 15/03/2011 13:51, Michael Droettboom wrote:
> It has no way of deducing the file format from the file object.
>
> You need to explicitly pass the format keyword to savefig, e.g.:
>
>     savefig(f, format='pdf')
>
> Mike
>
> On 03/15/2011 07:11 AM, Giovanni Luca Ciampaglia wrote:
>> Hi all,
>> I call savefig by passing to it a file-like object but it appears to not
>> get the graphics format right:
>>
>> f = open('not_a_pdf.pdf', 'w')
>> plot([1,2,3])
>> savefig(f)
>>
>> but it produces a PNG image. Can anybody confirm this? I am on
>> matplotlib 0.99.3
>>
>> Cheers,
>>
>> Giovanni
>>
>> ------------------------------------------------------------------------------
>> Colocation vs. Managed Hosting
>> A question and answer guide to determining the best fit
>> for your organization - today and in the future.
>> http://p.sf.net/sfu/internap-sfd2d
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>

Re: [Matplotlib-users] savefig not deducing file format

[Alan G I. <ala...@gm...>]

On 3/15/2011 8:51 AM, Michael Droettboom wrote:
> It has no way of deducing the file format from the file object.

Inspect f.name?

Alan Isaac