What is the most pythonic way of looping in a list until a particular value?

Question

I just recently learned about the iter function's second argument which can be used to loop until a certain condition is met.

with open(file, 'r') as f:
    for chunk in iter(lambda _ : f.read(8192), ''):
        print(chunk)

However, since iter accepts only functions, I could only code a similar thing for a list by converting it into a generator function and it to iter. Hence, I was wondering if there was a more pythonic way of doing this. Kindly note I have already seen Padraic's answer and I am specifically referring to just an equality condition.

Answer 1

another approach is with a generator

def file_iterator(filehandle, chunksize=8192, sentinel=''):
    while True:
        result = f.read(chunksize)
        if result == sentinel:
            return
        yield result

with open(file, 'r') as f:
    for chunk in file_iterator(file):
        print(chunk)