def write_file(filename):
"""
Write a number of random bytes (currently 1024) to the file *path*. This
file can then be used with :func:`load_file` to seed the PRNG again.
:param filename: The file to write data to (``bytes`` or ``unicode``).
:return: The number of bytes written.
"""
filename = _path_string(filename)
return _lib.RAND_write_file(filename)
def load_file(filename, maxbytes=_unspecified):
"""
Read *maxbytes* of data from *filename* and seed the PRNG with it.
Read the whole file if *maxbytes* is not specified or negative.
:param filename: The file to read data from (``bytes`` or ``unicode``).
:param maxbytes: (optional) The number of bytes to read. Default is to
read the entire file.
:return: The number of bytes read
"""
filename = _path_string(filename)
if maxbytes is _unspecified:
maxbytes = -1
elif not isinstance(maxbytes, int):
raise TypeError("maxbytes must be an integer")
return _lib.RAND_load_file(filename, maxbytes)