Thanks @jdog and @ccrino .

I already understand the time step. Thanks to you both.

M is -- and I is .., so I assume the M/I thing is the next test along failing after the E / T thing.

The instructions were to ignore leading and trailing zeroes. When you do that the time signature for the first one is singular, for the second it's tripled.

Still there's the same problem with Python3, there's print() expression issue in test,
as well as another one i get, if needed:
Traceback (most recent call last):
File "main.py", line 14, in
testAndPrint(decodeMorse(decodeBits('1')), 'E')
File "/home/codewarrior/solution.py", line 6, in decodeMorse
return ' '.join(''.join(MORSE_CODE[letter] for letter in word.split(' ')) for word in morseCode.strip().split(' '))
File "/home/codewarrior/solution.py", line 6, in
return ' '.join(''.join(MORSE_CODE[letter] for letter in word.split(' ')) for word in morseCode.strip().split(' '))
File "/home/codewarrior/solution.py", line 6, in
return ' '.join(''.join(MORSE_CODE[letter] for letter in word.split(' ')) for word in morseCode.strip().split(' '))
KeyError: '1'