Fix: encoding issue

read_data.py

@@ -10,8 +10,7 @@ def normalize(sig):
 
 def prepare_all_leads(path):
     if path.endswith(".txt"):
-        filecp = codecs.open(path, "r", encoding="base64")
-        sig = np.loadtxt(filecp, delimiter=',', unpack=True, encoding=None)
+        sig = np.loadtxt(path, delimiter=',', unpack=True)
     elif path.endswith(".npy"):
         sig = np.load(path, allow_pickle=True)
         x = pywt.wavedec(sig[0], 'db6', level=2)[0]