Operator precedence walrus operator oddity

walrus_oddity.py

"""
while n < 10 and chunk := f.read(256):  # SyntaxError

while n < 10 and (chunk := f.read(256)):  # Works

while chunk := f.read(256) and n < 10:  # chunk will be a boolean 😮

"""
from io import StringIO

f = StringIO("".join(c * 256 for c in "abcdefg"))  # File-like object

n = 0
chunks = []
while n < 10 and chunk := f.read(256):
    chunks.append(chunk)
    n += 1

assert all(type(chunk) is str for chunk in chunks)