@staticmethod<EOL><INDENT>def _split_scheme(expression):<DEDENT>
match = re.search(r'<STR_LIT>', expression)<EOL>if not match:<EOL><INDENT>scheme = '<STR_LIT>'<EOL>actual = expression<EOL><DEDENT>else:<EOL><INDENT>scheme = match.group(<NUM_LIT:1>)<EOL>actual = match.group(<NUM_LIT:2>)<EOL><DEDENT>return scheme, actual<EOL>
Splits the scheme and actual expression

:param str expression: The expression.

:rtype: str