def diff(result, exp):
diff_ = difflib.unified_diff(result.splitlines(), exp.splitlines(),<EOL>'<STR_LIT>', '<STR_LIT>')<EOL>return "<STR_LIT>" + "<STR_LIT:\n>".join(diff_) + "<STR_LIT:'>"<EOL>
Print unified diff.

:param result: Result string
:param exp: Expected result string