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Broken pdf export when using genuine TeX (Missing encode) #9702
Description
Bug report
Missing encode for pdf export with TeX
When exporting a pdf figure that uses the real TeX interpreter (not the one built into Matplotlib), either using PdfPages or savefig, the error message "TypeError: a bytes-like object is required, not 'str'" appears.
Code for reproduction
import matplotlib.pyplot as plt
plt.rc('text', usetex=True) # Without this line the error is not reproduced
fig = plt.figure(figsize=(3, 3))
plt.plot(range(7), [3, 1, 4, 1, 5, 9, 2], 'r-o')
plt.title('Page One')
plt.savefig('testpage.pdf') # error message at this line
plt.close()Actual outcome
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-5-18ae62d6b3c1> in <module>()
6 plt.plot(range(7), [3, 1, 4, 1, 5, 9, 2], 'r-o')
7 plt.title('Page One')
----> 8 plt.savefig('testpage.pdf') # saves the current figure into a pdf page
9 plt.close()
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\pyplot.py in savefig(*args, **kwargs)
695 def savefig(*args, **kwargs):
696 fig = gcf()
--> 697 res = fig.savefig(*args, **kwargs)
698 fig.canvas.draw_idle() # need this if 'transparent=True' to reset colors
699 return res
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\figure.py in savefig(self, fname, **kwargs)
1812 self.set_frameon(frameon)
1813
-> 1814 self.canvas.print_figure(fname, **kwargs)
1815
1816 if frameon:
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
2257 orientation=orientation,
2258 bbox_inches_restore=_bbox_inches_restore,
-> 2259 **kwargs)
2260 finally:
2261 if bbox_inches and restore_bbox:
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\backends\backend_pdf.py in print_pdf(self, filename, **kwargs)
2590 RendererPdf(file, image_dpi, height, width),
2591 bbox_inches_restore=_bbox_inches_restore)
-> 2592 self.figure.draw(renderer)
2593 renderer.finalize()
2594 file.finalize()
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
53 renderer.start_filter()
54
---> 55 return draw(artist, renderer, *args, **kwargs)
56 finally:
57 if artist.get_agg_filter() is not None:
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\figure.py in draw(self, renderer)
1293
1294 mimage._draw_list_compositing_images(
-> 1295 renderer, self, artists, self.suppressComposite)
1296
1297 renderer.close_group('figure')
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\image.py in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
136 if not_composite or not has_images:
137 for a in artists:
--> 138 a.draw(renderer)
139 else:
140 # Composite any adjacent images together
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
53 renderer.start_filter()
54
---> 55 return draw(artist, renderer, *args, **kwargs)
56 finally:
57 if artist.get_agg_filter() is not None:
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\axes\_base.py in draw(self, renderer, inframe)
2397 renderer.stop_rasterizing()
2398
-> 2399 mimage._draw_list_compositing_images(renderer, self, artists)
2400
2401 renderer.close_group('axes')
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\image.py in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
136 if not_composite or not has_images:
137 for a in artists:
--> 138 a.draw(renderer)
139 else:
140 # Composite any adjacent images together
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
53 renderer.start_filter()
54
---> 55 return draw(artist, renderer, *args, **kwargs)
56 finally:
57 if artist.get_agg_filter() is not None:
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\axis.py in draw(self, renderer, *args, **kwargs)
1136
1137 for tick in ticks_to_draw:
-> 1138 tick.draw(renderer)
1139
1140 # scale up the axis label box to also find the neighbors, not
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
53 renderer.start_filter()
54
---> 55 return draw(artist, renderer, *args, **kwargs)
56 finally:
57 if artist.get_agg_filter() is not None:
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\axis.py in draw(self, renderer)
280
281 if self.label1On:
--> 282 self.label1.draw(renderer)
283 if self.label2On:
284 self.label2.draw(renderer)
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
53 renderer.start_filter()
54
---> 55 return draw(artist, renderer, *args, **kwargs)
56 finally:
57 if artist.get_agg_filter() is not None:
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\text.py in draw(self, renderer)
797 textrenderer.draw_tex(gc, x, y, clean_line,
798 textobj._fontproperties, angle,
--> 799 mtext=mtext)
800 else:
801 textrenderer.draw_text(gc, x, y, clean_line,
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\backends\backend_pdf.py in draw_tex(self, gc, x, y, s, prop, angle, ismath, mtext)
1942 for x1, y1, dvifont, glyph, width in page.text:
1943 if dvifont != oldfont:
-> 1944 pdfname = self.file.dviFontName(dvifont)
1945 seq += [['font', pdfname, dvifont.size]]
1946 oldfont = dvifont
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\backends\backend_pdf.py in dviFontName(self, dvifont)
686 return dvi_info.pdfname
687
--> 688 psfont = self.texFontMap[dvifont.texname]
689 if psfont.filename is None:
690 raise ValueError(
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\dviread.py in __getitem__(self, texname)
864 fn, enc = result.filename, result.encoding
865 if fn is not None and not fn.startswith(b'/'):
--> 866 fn = find_tex_file(fn)
867 if enc is not None and not enc.startswith(b'/'):
868 enc = find_tex_file(result.encoding)
C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\dviread.py in find_tex_file(filename, format)
1043 # https://github.com/matplotlib/matplotlib/issues/633
1044 pipe = subprocess.Popen(cmd, stdout=subprocess.PIPE,
-> 1045 stderr=subprocess.PIPE)
1046 result = pipe.communicate()[0].rstrip()
1047 matplotlib.verbose.report('find_tex_file result: %s' % result,
C:\ProgramData\Anaconda3\lib\subprocess.py in __init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags, restore_signals, start_new_session, pass_fds, encoding, errors)
707 c2pread, c2pwrite,
708 errread, errwrite,
--> 709 restore_signals, start_new_session)
710 except:
711 # Cleanup if the child failed starting.
C:\ProgramData\Anaconda3\lib\subprocess.py in _execute_child(self, args, executable, preexec_fn, close_fds, pass_fds, cwd, env, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite, unused_restore_signals, unused_start_new_session)
969
970 if not isinstance(args, str):
--> 971 args = list2cmdline(args)
972
973 # Process startup details
C:\ProgramData\Anaconda3\lib\subprocess.py in list2cmdline(seq)
459 result.append(' ')
460
--> 461 needquote = (" " in arg) or ("\t" in arg) or not arg
462 if needquote:
463 result.append('"')
TypeError: a bytes-like object is required, not 'str'
Expected outcome
Normally the real Tex interpreter must work as well, not just the builtin one. The line with savefig should produce a pdf file not an error message. This issue appeared after updating to python 3.6 which differentiates bytes-like and unicode string object.
Matplotlib version
- Operating system: Windows 10
- Matplotlib version: 2.1.0 py36h11b4b9c_0
- Matplotlib backend (
print(matplotlib.get_backend())): module://ipykernel.pylab.backend_inline - Python version: Anaconda python 3.6.3 h9e2ca53_1
- Jupyter version (if applicable: IPython 6.1.0
- Other libraries: n.a.
Activity
[-]Missing encode for pdf export with genuine TeX[/-][+]Broken pdf export when using genuine TeX (Missing encode)[/+]jklymak commentedon Nov 6, 2017
I'm afraid I don't get this on Master on macOS from the command line or ipython... Maybe this has been fixed though a quick search doesn't make that obvious to me.
afvincent commentedon Nov 6, 2017
@jklymak Isn't it somehow related to #9292?
jklymak commentedon Nov 6, 2017
Ah yeah, that looks right. @stippingerm this looks to have been fixed, but feel free to re-open if you think it hasn't. 2.1.1 should be out "soonish"...
DrunkenGMaster commentedon Nov 20, 2017
I updated to Matplotlib 2.1.0-py36h11b4b9c_0 today. The bug was still present. I assume it will be fixed in 2.1.1