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NO-SNOW: Configure certain pandas warnings to be print-once #2528

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NO-SNOW: Configure certain pandas warnings to be print-once #2528

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1617e03
NO-SNOW: Configure certain pandas warnings to be print-once
sfc-gh-jkew Sep 9, 2025
c2bc308
Update changelog
sfc-gh-jkew Sep 9, 2025
2e2aa4c
simplefilter does not support module
sfc-gh-jkew Sep 10, 2025
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1 change: 1 addition & 0 deletions DESCRIPTION.md
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ Source code is also available at: https://github.com/snowflakedb/snowflake-conne
# Release Notes
- v3.18.0(TBD)
- Added the `workload_identity_impersonation_path` parameter to support service account impersonation for Workload Identity Federation on GCP workloads only
- Print user related pandas warnings only once

- v3.17.3(September 02,2025)
- Enhanced configuration file permission warning messages.
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19 changes: 17 additions & 2 deletions src/snowflake/connector/pandas_tools.py
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Expand Up @@ -42,6 +42,21 @@
logger = getLogger(__name__)


class PandasUserOnceWarnings(UserWarning):
"""
User warnings related to pandas operations
that only the user has control over. These
are configured to be printed once and only
once using a warning filter.
"""

pass


# Configure user-pandas warnings to print only once
warnings.simplefilter("once", PandasUserOnceWarnings)


def chunk_helper(
lst: pandas.DataFrame, n: int
) -> Iterator[tuple[int, pandas.DataFrame]]:
Expand Down Expand Up @@ -397,7 +412,7 @@ def write_pandas(
f"Pandas Dataframe has non-standard index of type {str(type(df.index))} which will not be written."
f" Consider changing the index to pd.RangeIndex(start=0,...,step=1) or "
f"call reset_index() to keep index as column(s)",
UserWarning,
PandasUserOnceWarnings,
stacklevel=2,
)

Expand All @@ -411,7 +426,7 @@ def write_pandas(
f"'{use_logical_type=}'. This can result in dateimes "
"being incorrectly written to Snowflake. Consider setting "
"'use_logical_type = True'",
UserWarning,
PandasUserOnceWarnings,
stacklevel=2,
)

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