B4J Question Pybridge usage ...

[rbghongade]

Dear friends ,
I want to pass an B4J array of doubles and compute wavelet decomposition using the python script and return the result to B4J.

import pywt
import numpy as np

def compute_wavelet_decomposition(data, wavelet_name='db1'):
  
    

    Parameters:
        data (list or np.array): The input signal.
        wavelet_name (str): The type of wavelet to use (default is 'db1').
    Returns:
 
    data = np.array(data)
  
    cA, cD = pywt.dwt(data, wavelet_name)
    return cA.tolist(), cD.tolist()

I tried to use the example provided by default but was unsuccessful.
Any pointer in the right direction is highly appreciable.

 

[Erel]

Install dependencies:
pip install numpy pywavelets

Private Sub ComputeWaveletDecomposition (Data As List) As ResumableSub
    Dim Code As String = $"
import pywt
import numpy as np
def ComputeWaveletDecomposition (Data, wavelet_name='db1'):
    data = np.array(Data)
    cA, cD = pywt.dwt(data, wavelet_name)
    return cA.tolist(), cD.tolist()
"$
    Wait For (Py.RunCode("ComputeWaveletDecomposition", Array(Data), Code).Fetch) Complete (res As PyWrapper)
    Return res.Value
End Sub

Usage:

Wait For (ComputeWaveletDecomposition(Array(0.1, 0.2, 0.4))) Complete (cACd() As Object)
Dim ca As List = cACd(0)
Dim cd As List = cACd(1)
Log(ca)
Log(cd)