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Merged
merged 2 commits into from
Jan 18, 2012
Merged

savefig to StringIO crashes #678

merged 2 commits into from
Jan 18, 2012

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mdboom
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@mdboom mdboom commented Jan 17, 2012

Example code:

import pylab, StringIO

out = StringIO.StringIO()
pylab.plot([1, 2, 3])
pylab.savefig(out, format = "svg")

Crashes here:
https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/backends/backend_svg.py#L1067
AttributeError: readable (apparently, it expects an io.StringIO file object)

... but using io.StringIO crashes as well, with an unicode issue:
TypeError: string argument expected, got 'str'

The only workaround I have found so far consists in subclassing StringIO:

class MyStringIO(StringIO):
    def readable(self):
        return True

    def writable(self):
        return True

    def seekable(self):
        return True

@mdboom
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mdboom commented Jan 17, 2012

I have attached a pull request that I believe addresses this. I wasn't aware that the io module and the cStringIO module are effectively incompatible. I've reverted to the old way of doing things for Python 2.x

mdboom added a commit that referenced this pull request Jan 18, 2012
@mdboom
Merge pull request #678 from mdboom/svg/stringio
bbe02dd 
savefig to StringIO crashes
@mdboom mdboom merged commit bbe02dd into matplotlib:master Jan 18, 2012
@mdboom mdboom deleted the svg/stringio branch March 3, 2015 18:44
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@mdboom @vchahun