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Error when runing the pipeline #16

Description

@cuilina2019

Hi, thanks for this interesting new approach for studying single-cell trajectories. I was following the tutorial notebook at https://github.com/Teichlab/Genes2Genes/blob/main/notebooks/Tutorial.ipynb and ran into errors during the Analysing gene-level alignments step:

df = aligner.get_stat_df() # ordered genes according to alignment similarity statistics

errors with:

Mean alignment similarity percentage (matched %): 
100.0 %
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/share/home/envs/g2g_env/lib/python3.8/site-packages/genes2genes/Main.py", line 493, in get_stat_df
    VisualUtils.plot_alignmentSim_vs_optCost(df)
  File "/share/home/envs/g2g_env/lib/python3.8/site-packages/genes2genes/VisualUtils.py", line 194, in plot_alignmentSim_vs_optCost
    sb.scatterplot(x=x['opt_alignment_cost'],y=x['alignment_similarity_percentage']*100,s=120, legend=False, hue =x['alignment_similarity_percentage'] ,
  File "/share/home/envs/g2g_env/lib/python3.8/site-packages/seaborn/relational.py", line 621, in scatterplot
    p.map_hue(palette=palette, order=hue_order, norm=hue_norm)
  File "/share/home/envs/g2g_env/lib/python3.8/site-packages/seaborn/_base.py", line 838, in map_hue
    mapping = HueMapping(self, palette, order, norm, saturation)
  File "/share/home/envs/g2g_env/lib/python3.8/site-packages/seaborn/_base.py", line 150, in __init__
    levels, lookup_table = self.categorical_mapping(
  File "/share/home/envs/g2g_env/lib/python3.8/site-packages/seaborn/_base.py", line 248, in categorical_mapping
    colors = color_palette(palette, n_colors)
  File "/share/home/envs/g2g_env/lib/python3.8/site-packages/seaborn/palettes.py", line 245, in color_palette
    pal_cycle = cycle(palette)
TypeError: 'LinearSegmentedColormap' object is not iterable

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