DataFrame.append removal in pandas 2.0 and concat replacement
Migration of legacy code that used DataFrame.append and Series.append from pandas 1.x to pandas 2.0+ crosses a documented compatibility boundary. The append methods were deprecated in pandas 1.4 and removed in pandas 2.0, so row-wise combination now relies on pandas.concat. The change shifts from a method style API to a function that returns a new object and
pandas