Resolve Deprecated Numpy Attribute Error Introduced in Commit 99153902f47a2e7faedc69d3740fd173fbf7891d

[eliseoe]

Error Message:
AttributeError: module 'numpy' has no attribute 'int'.

Description:
The commit with ID 9915390 has introduced issues related to the deprecation of np.int in NumPy, resulting in the mentioned attribute error. I believe this is because there is no compatibility with newer versions of NumPy. We should either agree on the same numpy version or resolve this for future versions.

Current Environment

• NumPy: 1.25.2 (most recent is 1.26.2)

[eliseoe]

Issue Update: Identified Error in esn/validation.py - Commit 99153902f47a2e7faedc69d3740fd173fbf7891d

Error Location:

File: esn/validation.py
Line: 61-64

I believe the error stems from Integer which is imported from skopt.space. Looking for replacement now.

Code:

if param_names[param_idx] == "tikhonov":
    search_space[param_idx] = Integer(
        *grid_range[param_idx], name=param_names[param_idx]
    )

[eliseoe]

Closing Comment:
Root cause stems from skopt/space/transformer.py where np.int is still used despite being deprecated.

Resolution Steps:

1. Replace all instances of np.int with int in the file 'anaconda3\envs\myenv\Lib\site-packages\skopt\space\transformers.py'.
2. Restart the kernel (or exit PyCharm and open it again).
3. Run the code again.

This fixed the issue for me.

Closing this issue now.