AttributeError: 'DataFrame' object has no attribute 'append'. Did you mean: '_append'?

[changwn]

AttributeError: 'DataFrame' object has no attribute 'append'. Did you mean: '_append'?

[LiuCanidk]

It is because the pandas version. Newer version of pandas deleted the attribute "append". So I recommend you to try two fixing ways:

• try to downgrade the pandas version. That is: conda/mamba remove pandas, and then conda/mamba install -y pandas==1.2.0. This failed for me again with the same attribute error.
• try to change the source code with new attribute pandas.concat. The error message must give you the information of where the error occur, for me it was "/work/share/acuwbf4fll/liucan/software/scFEA/src/scFEA.py", line 172", so vi /work/share/acuwbf4fll/liucan/software/scFEA/src/scFEA.py, and change the source code. That is,
  - source code: geneExprDf = geneExprDf.append(temp, ignore_index = True, sort=False)
  - change to: geneExprDf=pd.concat([geneExprDf, temp], ignore_index=True, sort=False)
  The second worked for me. Hope it helps.

[ltgmri]

Thanks to LiuCanidk. The second solution solved this error.