b2a_hex

Hexadecimal representation of binary data.

  sep
    An optional single character or byte to separate hex bytes.
  bytes_per_sep
    How many bytes between separators.  Positive values count from the
    right, negative values count from the left.

The return value is a bytes object.  This function is also
available as "hexlify()".

Example:
>>> binascii.b2a_hex(b'\xb9\x01\xef')
b'b901ef'
>>> binascii.hexlify(b'\xb9\x01\xef', ':')
b'b9:01:ef'
>>> binascii.b2a_hex(b'\xb9\x01\xef', b'_', 2)
b'b9_01ef'