paramsurvey / pandas-appender needs update for numpy>=2 and pandas >=2

[wumpus]

pandas-appender is a somewhat overly clever package that lets paramsurvey append the incremental output it seems to a dataframe. Due to the removal of a function in pandas 2, it needs to be updated. This became very obvious recently because numpy 2, which was released last June, requires pandas 2 and doesn't say that in its metadata.

I'm going to fix pandas-appender and I'll close this issue when I'm done.

The error looks like: ERROR test/unit/test_multiprocessing.py - ValueError: numpy.dtype size changed, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject -- which is confusingly similar to a different numpy problem from the past, with a different solution.

I've added a workaround to paramsurvey to hide this problem. If anyone sees this elsewhere, the way to hide it is to install:

pip install 'numpy<2'

I don't think updating ehtim will ever see this problem.

[voitsik]

It seems the DataFrame._append function is still present in Pandas 2.2. If I replace df.append with df._append in the pandas-appender package, it passes all tests.

[wumpus]

That's pretty funny.