Many thanks for the fix as well as for the info! I didn't know, there are built in fonts like this in matplotlib; this would explain the issue - the character support of Bitstream Vera Sans is indeed rather limited; morover the special "defaulting" status of this font hopefully means, that this shouldn't happen with other fonts, hence, I won't need to account for other unknown fonts, as I was worried about initially. Thanks again and regards vbr
2014-01-27 Michael Droettboom <md...@stsci.edu>: > Thanks for the report. > > Indeed, you are correct in that the root of this problem is that "Bitstream > Vera Sans" does not contain these characters, yet it is being selected > erroneously. > > It does appear that there is a bug in the font selection algorithm, that > "Bitstream Vera Sans" gets selected as a perfect match even when it is not > the first font in the requested list. Vera Sans ships with matplotlib and > is the "default fallback font", even though it is not installed as a system > font on your computer. > > I have a fix here: https://github.com/matplotlib/matplotlib/pull/2771 > > In the meantime, the solution you arrived at is the probably the best we can > do for now. > > Mike > > > On 01/27/2014 11:21 AM, Phil Elson wrote: > > Thanks for this Vlastimil, looks like there is either a subtlety beyond my > font knowledge or a bug here - mdboom, did you have any ideas? Otherwise I > think we need a github issue for this. > > Cheers, > > > On 4 January 2014 19:37, Vlastimil Brom <vlastimil.b...@gmail.com> wrote: >> >> Hi all, >> after upgrading to matplotlib 1.3.1, I noticed some display errors on >> the plots with regard to accented characters (such as carons etc.). >> As I recall, I had similar problem in the past and could work around >> them by modifying rcParams, however, this fix doesn't work as expected >> in 1.3.1. (with python 2.7.6, 32bit on Win 7, Czech - with both WXAgg >> and TKAgg backends). >> >From the usual Czech diacritics áčďéěíňóřšťúůýž some are not >> displayed (ďěňřťů) - replacement squares are shown instead. >> >> Simply prepending a suitable font at the beginning of the list >> rcParams['font.sans-serif'] doesn't help in 1.3.1. >> I eventually found out, that "Bitstream Vera Sans" (which is not >> installed on this computer) is somehow offending - as long as this >> item is in the list (even at the end), the mentioned characters aren't >> displayed. >> >> The problem can be observed in the following simple pylab script: >> ============== >> #! Python >> # -*- coding: utf-8 -*- >> >> # with implicit fonts "ďěňřťů" are not displayed properly in the plot >> title >> from matplotlib import rcParams >> rcParams['font.family'] = 'sans-serif' >> if "Bitstream Vera Sans" in rcParams['font.sans-serif']: >> rcParams['font.sans-serif'].remove("Bitstream Vera Sans") >> >> # after appending the "offending" font even at the end of the list (by >> uncommenting the following line), ďěňřťů are not displayed again >> # rcParams['font.sans-serif'].append("Bitstream Vera Sans") >> >> import pylab >> pylab.title(u"abcd áčďéěíňóřšťúůýž äöüß ê xyz") >> pylab.show() >> ============== >> >> Is there something special in the resolution of the font items in >> rcParams? >> This individual issue seems to be fixed with removing the single font, >> but I'd like to understand this more generally, as the installed fonts >> on different computers differ. >> >> Thanks in advance >> Vlastimil Brom >> >> >> ------------------------------------------------------------------------------ >> Rapidly troubleshoot problems before they affect your business. 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