Error in callback <function post_execute at 0x7f6c4b198398> (for post_execute) #16

Miriaam · 2018-10-30T17:39:15Z

When I run this code in Jupyter Notebook with the Ubuntu operating system:
fig, ax1 = plt.subplots(nrows=1, figsize=(10,5))
ax1.boxplot(df['est'], labels = ['Boxplot 1'])
ax1.set_title('Diagrama de caja')
ax1.set_xlabel('Representación de la variable 1 del dataframe')
ax1.set_ylabel('Valores')

After having importing and reading the dataset as df:
import numpy as np
import pandas as pd
import matplotlib as mpl
import matplotlib.pyplot as plt
%matplotlib inline
from matplotlib import rcParams
rcParams['figure.figsize'] = (16, 9)

I get the following error: Can anyone help me?
Error in callback <function post_execute at 0x7f6c4b198398> (for post_execute):

ValueError Traceback (most recent call last)
/home/miriam/.local/lib/python2.7/site-packages/matplotlib/pyplot.pyc in post_execute()
147 def post_execute():
148 if matplotlib.is_interactive():
--> 149 draw_all()
150
151 # IPython >= 2

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/_pylab_helpers.pyc in draw_all(cls, force)
134 for f_mgr in cls.get_all_fig_managers():
135 if force or f_mgr.canvas.figure.stale:
--> 136 f_mgr.canvas.draw_idle()
137
138 atexit.register(Gcf.destroy_all)

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in draw_idle(self, *args, **kwargs)
2053 if not self._is_idle_drawing:
2054 with self._idle_draw_cntx():
-> 2055 self.draw(*args, **kwargs)
2056
2057 def draw_cursor(self, event):

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/backends/backend_agg.pyc in draw(self)
435 # if toolbar:
436 # toolbar.set_cursor(cursors.WAIT)
--> 437 self.figure.draw(self.renderer)
438 # A GUI class may be need to update a window using this draw, so
439 # don't forget to call the superclass.

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/artist.pyc 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:

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/figure.pyc in draw(self, renderer)
1491
1492 mimage._draw_list_compositing_images(
-> 1493 renderer, self, artists, self.suppressComposite)
1494
1495 renderer.close_group('figure')

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/image.pyc in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
139 if not_composite or not has_images:
140 for a in artists:
--> 141 a.draw(renderer)
142 else:
143 # Composite any adjacent images together

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/artist.pyc 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:

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/axes/_base.pyc in draw(self, renderer, inframe)
2633 renderer.stop_rasterizing()
2634
-> 2635 mimage._draw_list_compositing_images(renderer, self, artists)
2636
2637 renderer.close_group('axes')

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/image.pyc in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
139 if not_composite or not has_images:
140 for a in artists:
--> 141 a.draw(renderer)
142 else:
143 # Composite any adjacent images together

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/artist.pyc 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:

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/axis.pyc in draw(self, renderer, *args, **kwargs)
1202 self._update_label_position(renderer)
1203
-> 1204 self.label.draw(renderer)
1205
1206 self._update_offset_text_position(ticklabelBoxes, ticklabelBoxes2)

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/artist.pyc 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:

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/text.pyc in draw(self, renderer)
704
705 with _wrap_text(self) as textobj:
--> 706 bbox, info, descent = textobj._get_layout(renderer)
707 trans = textobj.get_transform()
708

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/text.pyc in _get_layout(self, renderer)
303 baseline = 0
304 for i, line in enumerate(lines):
--> 305 clean_line, ismath = self.is_math_text(line, self.get_usetex())
306 if clean_line:
307 w, h, d = renderer.get_text_width_height_descent(clean_line,

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/text.pyc in is_math_text(s, usetex)
1186 return s, 'TeX'
1187
-> 1188 if cbook.is_math_text(s):
1189 return s, True
1190 else:

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/cbook/init.pyc in is_math_text(s)
2033 except UnicodeDecodeError:
2034 raise ValueError(
-> 2035 "matplotlib display text must have all code points < 128 or use "
2036 "Unicode strings")
2037

ValueError: matplotlib display text must have all code points < 128 or use Unicode strings

ValueError Traceback (most recent call last)
/home/miriam/.local/lib/python2.7/site-packages/IPython/core/formatters.pyc in call(self, obj)
332 pass
333 else:
--> 334 return printer(obj)
335 # Finally look for special method names
336 method = get_real_method(obj, self.print_method)

/home/miriam/.local/lib/python2.7/site-packages/IPython/core/pylabtools.pyc in (fig)
245
246 if 'png' in formats:
--> 247 png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
248 if 'retina' in formats or 'png2x' in formats:
249 png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))

/home/miriam/.local/lib/python2.7/site-packages/IPython/core/pylabtools.pyc in print_figure(fig, fmt, bbox_inches, **kwargs)
129
130 bytes_io = BytesIO()
--> 131 fig.canvas.print_figure(bytes_io, **kw)
132 data = bytes_io.getvalue()
133 if fmt == 'svg':

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
2210 orientation=orientation,
2211 dryrun=True,
-> 2212 **kwargs)
2213 renderer = self.figure._cachedRenderer
2214 bbox_inches = self.figure.get_tightbbox(renderer)

/home/miriam/.local/lib/python2.7/site-packages/matplotlib/backends/backend_agg.pyc in print_png(self, filename_or_obj, *args, **kwargs)
515
516 def print_png(self, filename_or_obj, *args, **kwargs):
--> 517 FigureCanvasAgg.draw(self)
518 renderer = self.get_renderer()
519 original_dpi = renderer.dpi