import os
from PyQt5 import QtCore, QtWidgets, QtGui
nomuti = os.getlogin()


measures = []


with open('test_test_test.txt') as f:
    i = 0
    read = False

    for lines in f:
        if 'Mesures' in lines:
            read = True
            continue
        if not read:
            continue
        data = lines.strip()
        if not data:
            continue
        if not i % 922: #922 valeurs frequences & amplitudes
            measures.append([])
            #print(measures)
        try:
            measures[-1].append(float(data))

        except ValueError:
            if not measures[-1]:
                measures.pop()
            break
        i += 1
    print(measures)