5IGI0.py

from bitstring import Bits

class SIGIO:
  """SIGIO is a binary-like format used by a person named 5IGI0 to interchange feelings.
  The format is really limited to them and has no specification, with efforts of digging
  it made this implementation possible."""

  @staticmethod
  def encode(s):
    return ''.join("'" if b else '-' for b in Bits(s.encode('ascii')))

  @staticmethod
  def decode(s):
    def to_bool(c):
      if not c in "-'":
        raise SyntaxError("invalid non-sigio character found")
      return c == "-"

    return Bits(to_bool(b) for b in s).tobytes().decode('ascii')