UnicodeDecodeError

[Francisco J. H. Heras]

I have this error when running the notebook with "jupyter notebook"

UnicodeDecodeError                        Traceback (most recent call last)
<ipython-input-8-42c04a259fe9> in <module>()
      1 file = open(train_datasets[0])
----> 2 train_A = pickle.load(file)
      3 train_A.shape

/usr/lib/python3.5/codecs.py in decode(self, input, final)
    319         # decode input (taking the buffer into account)
    320         data = self.buffer + input
--> 321         (result, consumed) = self._buffer_decode(data, self.errors, final)
    322         # keep undecoded input until the next call
    323         self.buffer = data[consumed:]

UnicodeDecodeError: 'utf-8' codec can't decode byte 0x80 in position 0: invalid start byte