decoding bytearray without Unicode errors

[Rumidom]

hi, how can i decode a bytearray with bytes that cant be translated, and replace those with unknown? on python

print(b'\xff\xff\xff\xff'.decode('utf8','replace'))

outputs: '����'

but on Micropython I still get a UnicodeError

>>> print(b'\xff\xff\xff\xff'.decode('utf8','replace'))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeError: 

[peterhinch]

I think the code is here - if so, the feature has not yet been implemented,

[Rumidom]

line 1946, Im still not confident/familiar with the code base to contribute myself, but I might give it a try another time if it is still to be implemented, for now i'm using a simple ASCII decoder in python:

def ASCII_Decode(byte_array):
    result = ""
    for byte in byte_array:
        if 0 <= byte <= 127:
            result += chr(byte)
        else:
            result += "?"
    return result

[peterhinch]

Or try:

byte_array = b'rats\xff foo'
bytearray([x if x <= 127 else ord('?') for x in byte_array])

[Rumidom]

pythonic, I like it

[peterhinch]

On second thoughts I think this is more RAM-efficient

bytearray((x if x <= 127 else ord('?') for x in byte_array))

The first instantiates a list then converts it to a bytearray, this creates a generator.