43 lines
2.1 KiB
Python
43 lines
2.1 KiB
Python
_chained_assignment_msg = (
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"A value is being set on a copy of a DataFrame or Series "
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"through chained assignment.\n"
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"Such chained assignment never works to update the original DataFrame or "
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"Series, because the intermediate object on which we are setting values "
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"always behaves as a copy (due to Copy-on-Write).\n\n"
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"Try using '.loc[row_indexer, col_indexer] = value' instead, to perform "
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"the assignment in a single step.\n\n"
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"See the documentation for a more detailed explanation: "
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"https://pandas.pydata.org/pandas-docs/stable/user_guide/"
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"copy_on_write.html#chained-assignment"
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)
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_chained_assignment_method_msg = (
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"A value is being set on a copy of a DataFrame or Series "
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"through chained assignment using an inplace method.\n"
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"Such inplace method never works to update the original DataFrame or Series, "
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"because the intermediate object on which we are setting values always "
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"behaves as a copy (due to Copy-on-Write).\n\n"
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"For example, when doing 'df[col].method(value, inplace=True)', try "
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"using 'df.method({col: value}, inplace=True)' instead, to perform "
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"the operation inplace on the original object, or try to avoid an inplace "
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"operation using 'df[col] = df[col].method(value)'.\n\n"
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"See the documentation for a more detailed explanation: "
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"https://pandas.pydata.org/pandas-docs/stable/user_guide/"
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"copy_on_write.html"
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)
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_chained_assignment_method_update_msg = (
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"A value is being set on a copy of a DataFrame or Series "
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"through chained assignment using an inplace method.\n"
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"Such inplace method never works to update the original DataFrame or Series, "
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"because the intermediate object on which we are setting values always "
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"behaves as a copy (due to Copy-on-Write).\n\n"
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"For example, when doing 'df[col].update(other)', try "
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"using 'df.update({col: other})' instead, to perform "
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"the operation inplace on the original object.\n\n"
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"See the documentation for a more detailed explanation: "
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"https://pandas.pydata.org/pandas-docs/stable/user_guide/"
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"copy_on_write.html"
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)
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