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#1970 Improve Error Handling in to_dask_array for Non-Numeric Columns #2431

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#1970 Improve Error Handling in to_dask_array for Non-Numeric Columns #2431

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7 changes: 7 additions & 0 deletions packages/vaex-core/vaex/dataframe.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3417,6 +3417,13 @@ def to_dask_array(self, chunks="auto"):
"""
import dask.array as da
import uuid
import numpy as np

#Check for non-numeric columns
non_numeric_columns= [col for col in self.columns if not np.issubdtype(self[col].dtype, np.number)]
if non_numeric_columns:
raise TypeError(f"Cannot Convert non-numeric columns to Dask array. Non-numeric columns: {non_numeric_columns}")

dtype = self._dtype
chunks = da.core.normalize_chunks(chunks, shape=self.shape, dtype=dtype.numpy)
name = 'vaex-df-%s' % str(uuid.uuid1())
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