Function read_exact

Lib/test/xpickle_worker.py:28–35

(f, n)

    exec(sources, vars(test_module))

def read_exact(f, n):
    buf = b''
    while len(buf) < n:
        chunk = f.read(n - len(buf))
        if not chunk:
            raise EOFError
        buf += chunk
    return buf

in_stream = getattr(sys.stdin, 'buffer', sys.stdin)
out_stream = getattr(sys.stdout, 'buffer', sys.stdout)