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make df strategy less complex #989

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Oct 28, 2022
Merged

make df strategy less complex #989

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15 changes: 12 additions & 3 deletions pandera/strategies.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1103,14 +1103,23 @@ def _dataframe_strategy(draw):
)

# this is a hack to convert np.str_ data values into native python str.
string_columns = []
for col_name, col_dtype in col_dtypes.items():
if col_dtype in {"object", "str"} or col_dtype.startswith(
"string"
):
# pylint: disable=cell-var-from-loop,undefined-loop-variable
strategy = strategy.map(
lambda df: df.assign(**{col_name: df[col_name].map(str)})
string_columns.append(col_name)

if string_columns:
# pylint: disable=cell-var-from-loop,undefined-loop-variable
strategy = strategy.map(
lambda df: df.assign(
**{
col_name: df[col_name].map(str)
for col_name in string_columns
}
)
)

strategy = strategy.map(
lambda df: df if df.empty else df.astype(col_dtypes)
Expand Down