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BUG: User-facing AssertionError with DataFrame.to_html(classes=<invalid type>) #25608

simonjayhawkins opened this issue Mar 8, 2019 · 3 comments


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commented Mar 8, 2019

Code Sample, a copy-pastable example if possible

import pandas as pd

Problem description

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\simon\OneDrive\code\pandas-simonjayhawkins\pandas\core\", line 2212, in to_html
    formatter.to_html(classes=classes, notebook=notebook, border=border)
  File "C:\Users\simon\OneDrive\code\pandas-simonjayhawkins\pandas\io\formats\", line 729, in to_html
    html = Klass(self, classes=classes, border=border).render()
  File "C:\Users\simon\OneDrive\code\pandas-simonjayhawkins\pandas\io\formats\", line 146, in render
  File "C:\Users\simon\OneDrive\code\pandas-simonjayhawkins\pandas\io\formats\", line 167, in _write_table
AssertionError: classes must be list or tuple, not <class 'bool'>

Expected Output

TypeError: classes must be a string, list or tuple, not <class 'bool'>

Output of pd.show_versions()

[paste the output of pd.show_versions() here below this line]


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commented Mar 8, 2019

@mroeschke : the solution requires a change to one line of code, add a simple parametrised test and a whatsnew entry under bugfix. Can this be labelled good first issue?


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commented Mar 8, 2019

Thanks for the suggestion!


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commented Mar 9, 2019

I can work on this

ArtificialQualia added a commit to ArtificialQualia/pandas that referenced this issue Mar 9, 2019

@jreback jreback added this to the 0.25.0 milestone Mar 10, 2019

jreback added a commit that referenced this issue Mar 10, 2019

thoo added a commit to thoo/pandas that referenced this issue Mar 11, 2019

Merge remote-tracking branch 'upstream/master' into pivot
* upstream/master: (110 commits)
  DOC: hardcode contributors for 0.24.x releases (pandas-dev#25662)
  DOC: restore toctree maxdepth (pandas-dev#25134)
  BUG: Redefine IndexOpsMixin.size, fix pandas-dev#25580. (pandas-dev#25584)
  BUG: to_csv line endings with compression (pandas-dev#25625)
  DOC: file obj for to_csv must be newline='' (pandas-dev#25624)
  Suppress incorrect warning in nargsort for timezone-aware DatetimeIndex (pandas-dev#25629)
  TST: fix incorrect sparse test (now failing on scipy master) (pandas-dev#25653)
  CLN: Removed debugging code (pandas-dev#25647)
  DOC: require Return section only if return is not None nor commentary (pandas-dev#25008)
  DOC:Remove hard-coded examples from _flex_doc_SERIES (pandas-dev#24589) (pandas-dev#25524)
  TST: xref pandas-dev#25630 (pandas-dev#25643)
  BUG: Fix pandas-dev#25481 by fixing the error message in TypeError (pandas-dev#25540)
  Fixturize tests/frame/ (pandas-dev#25642)
  Fixturize tests/frame/ (pandas-dev#25639)
  Fixturize tests/frame/ (pandas-dev#25634)
  Fixturize tests/frame/ (pandas-dev#25628)
  BUG: Fix user-facing AssertionError with to_html (pandas-dev#25608) (pandas-dev#25620)
  DOC: resolve all GL03 docstring validation errors (pandas-dev#25525)
  TST: failing wheel building on PY2 and old numpy (pandas-dev#25631)
  DOC: Remove makePanel from docs (pandas-dev#25609) (pandas-dev#25612)
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