[IPython-dev] [Notebook 1.0.0] Display two png images side by side

Zoltán Vörös zvoros@gmail....
Mon Sep 2 09:57:32 CDT 2013


Hi Francesco,
>
>     import base64
>     pngs = []
>     for fn in images:  # loop over the input file names
>         with open(fn, "rb") as f:
>             pngs.append('data:image/png;base64,' + 
> base64.b64encode(f.read()))
>
> But I get the following error: on the last line:
> TypeError: Can't convert 'bytes' object to str implicitly
>
> Is there a way to disable table lines in HTML?
 From this, it seems to me that you encounter the problem on the 
png-to-base64 conversion. Is that correct? Because afterwards the image 
is encoded in base64, so it's not binary anymore, and I don't see why 
html should fail at that point. But if it is an error in b64encode, then 
you probably don't have a valid input file.

Cheers,
Zoltán
>
>
> 2013/9/2 Zoltán Vörös <zvoros@gmail.com <mailto:zvoros@gmail.com>>
>
>     Hi Francesco,
>
>     It might be a hack, but this works:
>
>     with open("roche1.png", "rb") as image_file:
>         im1 = 'data:image/png;base64,' +
>     base64.b64encode(image_file.read())
>
>     with open("roche2.png", "rb") as image_file:
>         im2 = 'data:image/png;base64,' +
>     base64.b64encode(image_file.read())
>
>     s = """<table>
>     <tr>
>     <th><img src="%s"/></th>
>     <th><img src="%s"/></th>
>     </tr></table>"""%(im1, im2)
>     t=HTML(s)
>     display(t)
>
>
>     Cheers,
>     Zoltán
>
>
>     On 02/09/13 15:32, Francesco Montesano wrote:
>>     Dear List,
>>
>>     I have a script that produces some image and I'm creating a
>>     notebook for testing/logging.
>>
>>     For comparison reasons, I would like to load to images in a cell
>>     and show them side by side.
>>
>>         from IPython.display import Image
>>         constr = Image(filename="fig1.png")
>>         sigma = Image(filename="fig2.png")
>>         display(constr, sigma)
>>
>>
>>     put the figures one after the other. I've tried to play with the
>>     width keyword, but that does not help.
>>
>>     Making an HTML table with the output of "Image" does not work (I
>>     don't know if I should add "of course")
>>
>>     s = """<table>
>>     <tr>
>>     <th>{f1}</th>
>>     <th>{f2}</th>
>>     </tr>""".format(f1=constr, f2=sigma)
>>     t=HTML(s)
>>     display(t)
>>
>>     Is there any way to do what I want directly in the notebook? (I
>>     guess that there is some python library to do it, but I think
>>     that the notebook should be able to do it)
>>
>>     Cheers,
>>
>>     Fra
>>
>>
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>
>
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