How to read lines from a mmapped file?

Question

Is seems that the mmap interface only supports readline(). If I try to iterate over the object I get character instead of complete lines.

What would be the \"python

Answer 1

The most concise way to iterate over the lines of an mmap is

with open(STAT_FILE, "r+b") as f:
    map_file = mmap.mmap(f.fileno(), 0, prot=mmap.PROT_READ)
    for line in iter(map_file.readline, b""):
        # whatever

Note that in Python 3 the sentinel parameter of iter() must be of type bytes, while in Python 2 it needs to be a str (i.e. "" instead of b"").