python/pandas/ValueError: y contains previously unseen labels: ''.md
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@@ -9,5 +9,5 @@ le = preprocessing.LabelEncoder()
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le.fit(X)
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le_dict = dict(zip(le.classes_, le.transform(le.classes_)))
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-le_dict.get(new_item, None)
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+df[your_col] = df[your_col].apply(lambda x: le_dict.get(x, None))
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```
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