TypeError: pso() got an unexpected keyword argument 'w_bounds'

This error message is indicating that there is an unexpected keyword argument 'w_bounds' in the function call to 'pso()'. This means that the function 'pso()' does not have a parameter called 'w_bounds'.

There could be several reasons for this error, such as:

- The function 'pso()' may have been updated and 'w_bounds' is no longer a valid parameter.
- The wrong version of the function 'pso()' may have been imported, which does not have 'w_bounds' as a parameter.
- There may be a typo in the parameter name, causing the function to interpret it as an unexpected keyword argument.

To fix this error, you should review the documentation for the function 'pso()' and check if 'w_bounds' is a valid parameter. If it is not, consider using a different parameter or updating the function to include the desired functionality. If it is a valid parameter, ensure that it is spelled correctly and that the correct version of the function is being used.