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Update _topics.py #2254

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Update _topics.py #2254

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4 changes: 4 additions & 0 deletions bertopic/plotting/_topics.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import numpy as np
import pandas as pd
import warnings
from umap import UMAP
from typing import List, Union
from sklearn.preprocessing import MinMaxScaler
Expand Down Expand Up @@ -56,6 +57,9 @@ def visualize_topics(
freq_df = freq_df.loc[freq_df.Topic != -1, :]
if topics is not None:
topics = list(topics)
elif len(topics) < 5:
warnings.warn("Too few topics to display.")
return
elif top_n_topics is not None:
topics = sorted(freq_df.Topic.to_list()[:top_n_topics])
else:
Expand Down