just i need help code in python padndpass filters

Part Two: String Decoder In this part, you have to design, implement and test a decoder for the system in part one, which can recover the text string from the encoded multi-frequency signal stored in .wav files. Simply, your system should take an audio file (.wav) as an input and recognizes the encoded characters and display the string on the screen. You must use the following two approaches to build your decoder: Use frequency analysis (e.g. Fourier transform) of the input signal to determine which frequencies that have the highest amplitudes in each 40ms segment and decode the character and its case from them. Use bank of very narrow bandpass Filters, so that you design filters represent each given frequencies (9 frequency components for the letter and two frequencies for the case) and pass each 40ms segment of the input signal through them to pick the filters that gives the highest output, then determine the frequencies in each 40ms