That's a pity. In the meanwhile, you can still create SVG images if
you choose this a write format, and pysvg might be able to convert to
PNG (?).
On 31 May 2017 at 10:21, Maciek Wójcikowski <mac...@wojcikowski.pl> wrote:
> Hi,
>
> PNG is not supported yet on Windows - Openbabel was not compiled with it, as
> there is no cairo package on Anaconda main channel for windows (note you're
> using conda-forge).
>
> Unfortunately this is also the case in bioconda, so for now there is no
> better conda solution yet. I will revisit this issue and try to support PNG
> files.
>
> ----
> Pozdrawiam, | Best regards,
> Maciek Wójcikowski
> mac...@wojcikowski.pl
>
> 2017-05-31 11:06 GMT+02:00 Hongbin Yang <yanyangh...@163.com>:
>>
>> Hi，
>>
>> I installed openbabel via `conda install -c openbabel openbabel`.
>>
>> I wanted to draw the molecule like
>> `pybel.readstring('smi','c1ccccc1').draw()`
>>
>> Then the error was raised:
>> C:\Users\yanya\Anaconda2\lib\site-packages\pybel.pyc in draw(self, show,
>> filename, update, usecoords)
>> 615 formatok = obconversion.SetOutFormat("_png2")
>> 616 if not formatok:
>> --> 617 raise ImportError("PNG depiction support not found. You should "
>> 618 "compile Open Babel with support for Cairo. See "
>> 619 "installation instructions for more "
>>
>> ImportError: PNG depiction support not found. You should compile Open
>> Babel with support for Cairo. See installation instructions for more
>> information.
>>
>> The installed packages includes:
>> libpng 1.6.28 vc9_0 [vc9] conda-forge
>> pillow 4.0.0 py27_0
>> pycairo 1.10.0 <pip>
>> openbabel 2.4.1 py27_2 openbabel
>> cairo 1.14.6 vc9_4 [vc9] conda-forge
>>
>> I have both pillow and (py)cairo. Why can't I draw the molecule ?
>> I guess that if I followed the suggestion and compile it with suport cairo
>> it will work. But I have to work with conda. Is there any better way?
>>
>> Sincerely,
>>
>> ________________________________
>> Hongbin Yang 杨弘宾
>> Research: Toxicophore and Chemoinformatics
>> Pharmaceutical Science, School of Pharmacy
>> East China University of Science and Technology
>>
>>
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>
>
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