This is a Python implementation of the wavelet-based delineator suggested by Martinez et al [1].
[1] Martinez, J. P., Almeida, R., Olmos, S., Rocha, A. P., & Laguna, P. (2004). A Wavelet-Based ECG Delineator Evaluation on Standard Databases. IEEE Transactions on Biomedical Engineering, 51, 570–581.