Traceback (most recent call last): ...... File "/home/tongli/miniconda3/envs/maars/lib/python3.7/site-packages/dabest/_classes.py", line 1235, in plot out = EffectSizeDataFramePlotter(self, **all_kwargs) File "/home/tongli/miniconda3/envs/maars/lib/python3.7/site-packages/dabest/plotter.py", line 377, in EffectSizeDataFramePlotter **group_summary_kwargs) File "/home/tongli/miniconda3/envs/maars/lib/python3.7/site-packages/dabest/plot_tools.py", line 162, in gapped_lines quantiles = data.groupby(x)[y].quantile([0.25, 0.75])\ File "/home/tongli/miniconda3/envs/maars/lib/python3.7/site-packages/pandas/core/groupby/groupby.py", line 1908, in quantile interpolation=interpolation, File "/home/tongli/miniconda3/envs/maars/lib/python3.7/site-packages/pandas/core/groupby/groupby.py", line 2248, in _get_cythonized_result func(**kwargs) # Call func to modify indexer values in place File "pandas/_libs/groupby.pyx", line 692, in pandas._libs.groupby.group_quantile TypeError: must be real number, not list