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DEPR: reword deprecation message for mode.copy_on_write option #63319

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Merged
rhshadrach merged 1 commit into from
Dec 11, 2025
+4 −3
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DEPR: reword deprecation message for mode.copy_on_write option #63319

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7 changes: 4 additions & 3 deletions pandas/core/config_init.py
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Original file line number Diff line number Diff line change
Expand Up @@ -423,7 +423,7 @@ def is_terminal() -> bool:
# to False. This environment variable can be set for testing.
"warn"
if os.environ.get("PANDAS_COPY_ON_WRITE", "0") == "warn"
else os.environ.get("PANDAS_COPY_ON_WRITE", "0") == "1",
else os.environ.get("PANDAS_COPY_ON_WRITE", "1") == "1",
copy_on_write_doc,
validator=is_one_of_factory([True, False, "warn"]),
)
Expand Down Expand Up @@ -908,7 +908,8 @@ def register_converter_cb(key: str) -> None:
"mode.copy_on_write",
Pandas4Warning,
msg=(
"Copy-on-Write can no longer be disabled, setting to False has no impact. "
"This option will be removed in pandas 4.0."
"The 'mode.copy_on_write' option is deprecated. Copy-on-Write can no longer "
"be disabled (it is always enabled with pandas >= 3.0), and setting the option "
"has no impact. This option will be removed in pandas 4.0."
),
)
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