FIX: Min

mne/utils/dataframe.py

@@ -4,8 +4,6 @@
 # License: BSD-3-Clause
 # Copyright the MNE-Python contributors.
 
-from inspect import signature
-
 import numpy as np
 
 from ..defaults import _handle_default
@@ -51,21 +49,14 @@ def _convert_times(times, time_format, meas_date=None, first_time=0):
 
 
 def _inplace(df, method, **kwargs):
-    # Handle transition: inplace=True (pandas <1.5) → copy=False (>=1.5)
-    # and 3.0 warning:
-    # E   DeprecationWarning: The copy keyword is deprecated and will be removed in a
-    #     future version. Copy-on-Write is active in pandas since 3.0 which utilizes a
-    #     lazy copy mechanism that defers copies until necessary. Use .copy() to make
-    #     an eager copy if necessary.
     _meth = getattr(df, method)  # used for set_index() and rename()
 
+    # TODO: deprecation in Pandas 3.0, can remove once we require 3+
     if check_version("pandas", "3.0"):
         return _meth(**kwargs)
-    elif "copy" in signature(_meth).parameters:
-        return _meth(**kwargs, copy=False)
     else:
-        _meth(**kwargs, inplace=True)
-        return df
+        # "copy" in signature(_meth).parameters
+        return _meth(**kwargs, copy=False)
 
 
 @verbose

pyproject.toml

@@ -111,7 +111,7 @@ full-no-qt = [
   "nilearn",
   "numba",
   "openmeeg >= 2.5.5",
-  "pandas",  # >= 1.4
+  "pandas",  # >= 1.5
   "pillow",  # for `Brain.save_image` and `mne.Report`
   "pyarrow",  # only needed to avoid a deprecation warning in pandas
   "pybv",