fix(pandas): don't reassign the same column to silence SettingWithCop…

…yWarning warning

The warning is valid in many contexts, but it's spurious here and it's
quite loud.

ibis/backends/pandas/execution/selection.py

@@ -333,7 +333,8 @@ def build_df_from_selection(
             renamed_cols[from_col] = to_cols[0]
         else:
             for new_col in to_cols:
-                result[new_col] = result.loc[:, from_col]
+                if from_col != new_col:
+                    result[new_col] = result[from_col]
 
     if renamed_cols:
         result = result.rename(columns=renamed_cols)

pyproject.toml

@@ -188,7 +188,6 @@ filterwarnings = [
   'ignore:Using \.astype to convert from timezone-(naive|aware) dtype:FutureWarning',
   "ignore:This pattern is interpreted as a regular expression, and has match groups:UserWarning",
   "ignore:The default dtype for empty Series will be 'object':FutureWarning",
-  'ignore:\nA value is trying to be set on a copy of a slice from a DataFrame:',
   "ignore:the `interpolation=` argument to percentile was renamed to `method=`:DeprecationWarning",
   "ignore:Explicitly passing `name=None`:FutureWarning",
   # the warning suggestion to simply remove the argument in the call isn't correct