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Don't cast pandas.Categorical to object #2170

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Don't cast pandas.Categorical to object #2170

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Don't cast pandas.Categorical to object
dsaxton May 25, 2020
9ae2e0e
Merge remote-tracking branch 'upstream/master' into do-not-cast-categ…
dsaxton May 25, 2020
e6b051c
Merge remote-tracking branch 'upstream/master' into do-not-cast-categ…
Jun 12, 2020
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5 changes: 1 addition & 4 deletions altair/utils/core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -282,10 +282,7 @@ def to_list_if_array(val):

for col_name, dtype in df.dtypes.iteritems():
if str(dtype) == "category":
# XXXX: work around bug in to_json for categorical types
# https://github.com/pydata/pandas/issues/10778
col = df[col_name].astype(object)
df[col_name] = col.where(col.notnull(), None)
continue
elif str(dtype) == "string":
# dedicated string datatype (since 1.0)
# https://pandas.pydata.org/pandas-docs/version/1.0.0/whatsnew/v1.0.0.html#dedicated-string-data-type
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