Why doesn't Pytesseract recognize the simplest black and white number?

Question

Python

It is necessary to recognize the number from the picture, processed the picture as much as possible, the result:
From this:

Got this:


With these configurations (changed oem, psm, lang, removed and added whitelist):

num1 = pytesseract.image_to_string(black_white, lang=None, config=' --psm 10 --oem 3 -c tessedit_char_whitelist=0123456789')

required number was not output