Added: encoding=None

read_data.py

@@ -16,7 +16,7 @@ def visualize_sig(sig):
 
 def prepare_all_leads(path):
     if path.endswith(".txt"):
-        sig = np.loadtxt(path, delimiter=',', unpack=True)
+        sig = np.loadtxt(path, delimiter=',', unpack=True, encoding=None)
     elif path.endswith(".npy"):
         sig = np.load(path, allow_pickle=True)
         x = pywt.wavedec(sig[0], 'db6', level=2)[0]