UTF-8 in Python

Tole je del kode:

....
list_of_files = glob.glob(potSlik + 'Ko*.jpg')
latest_file = max(list_of_files, key=os.path.getctime)
checksum1 = hashlib.md5(open(latest_file).read()).hexdigest()
....

Ta vrag deluje v Python 2. Sedaj pa zadevo selim v Python 3 in dobim napako:

Traceback (most recent call last):
  File "/home/user/webcam/webcam-ko.py", line 72, in <module>
    checksum1 = hashlib.md5(open(latest_file).read()).encode("utf-8").hexdigest()
  File "/usr/lib/python3.6/codecs.py", line 321, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte

Kaj se je spremenilo v prehodu iz Python2 na Python3? In kako naj laik reši problem?

No evo sem poguglal, ce hoces, da zadeva dela v 2 in 3, moras uvoziti open iz io, potem se oba obnasata kot trojka.

from io import open

#...
checksum1 = hashlib.md5(open(latest_file, mode='br').read()).hexdigest()

Jst imam tako, da uporabim str.encode(), da string spremenim v byte:

checksum1 = hashlib.md5( str.encode( open(latest_file).read() ) ).hexdigest()

Pa uporabim hashlib.sha512()

HotBurek je 21. mar 2020 ob 15:39 izjavil:

Jst imam tako, da uporabim str.encode(), da string spremenim v byte:

checksum1 = hashlib.md5( str.encode( open(latest_file).read() ) ).hexdigest()

Upam, da me ne boste smatrali za dlakocepa, ampak to bi delovalo samo za text file, jpg moras se vedno prebrati kot binary.