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Fix nullable dtypes not compatible with Altair #250

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merged 3 commits into from
Feb 3, 2021
Merged

Fix nullable dtypes not compatible with Altair #250

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66f638a
Patch config
westernguy2 Jan 27, 2021
aae17d6
Merge remote-tracking branch 'upstream/master'
westernguy2 Jan 29, 2021
e99b919
Fix bug with new Pandas nullable dtype
westernguy2 Jan 31, 2021
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4 changes: 4 additions & 0 deletions lux/vislib/altair/AltairChart.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
# limitations under the License.

import pandas as pd
import numpy as np
import altair as alt
from lux.utils.date_utils import compute_date_granularity

Expand Down Expand Up @@ -117,6 +118,9 @@ def initialize_chart(self):
@classmethod
def sanitize_dataframe(self, df):
for attr in df.columns:
if pd.api.types.is_float_dtype(df[attr].dtype): # Check if dtype is unrecognized by Altair
df[attr] = df[attr].astype(np.float64)

# Altair can not visualize non-string columns
# convert all non-string columns in to strings
df = df.rename(columns={attr: str(attr)})
Expand Down