f = open(filename)
while True:
    line = f.readline()
    if not line:
        break
    process(line)

f6007b36aef61bf3718e5d185e3095f7458546a6
<mask token>

<mask token>
while True:
    line = f.readline()
    if not line:
        break
    process(line)

f = open(filename)
while True:
    line = f.readline()
    if not line:
        break
    process(line)
