在 read_pickle 之后追加

Question

I'm trying to open a pickle file, append it, and write it back out as a new save file, but when I open it later, it is always the same file. How do I append properly?

My code:

OGFile = pd.read_pickle(file,compression=None)
OGFile.append(data)
OGFile.to_pickle(file)

Answer 1

The second line should be:

OGFile = OGFile.append(data)

The append() method doesn't change the DataFrame object 'inplace'.