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Fix Pandas 3.0 StringDType error #201

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Merged
bkemper24 merged 1 commit into from
Feb 26, 2026
Merged

Fix Pandas 3.0 StringDType error #201

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11 changes: 10 additions & 1 deletion swat/cas/datamsghandlers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -547,7 +547,16 @@ def typemap(name, typ, dtype=dtype):
elif typ == 'TIME':
return (8, 'NUMERIC', 'TIME')
else:
match = re.match(r'^\W?([A-Za-z])(\d*)', typ.str)
# In Pandas 3.0 the DType for Strings changed
# from Object to StringDType.
# StringDType does not have an .str attribute.
# this api check is the recommended way to
# check for a String column across Pandas versions
if pd.api.types.is_string_dtype(typ):
thetype = "S"
else:
thetype = typ.str
match = re.match(r'^\W?([A-Za-z])(\d*)', thetype)
if match:
out = None
dtype = match.group(1)
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