from buffer_types import AnyBytes, StrOrBytes

def hexlify(data: AnyBytes, sep: AnyBytes = ...) -> bytes: ...
def unhexlify(data: StrOrBytes) -> bytes: ...
def a2b_base64(data: AnyBytes) -> bytes: ...
def b2a_base64(data: AnyBytes) -> bytes: ...
def crc32(data: AnyBytes, crc: int = ...) -> int: ...
