wanted: regex or code to find valide def statements in a line

[Skaperen]

in a text file may be lines that look like valid python def statements. there may be various other things like "def" appearing in a different context. i would like to find some code or a regex that can determine if the entire line is a valid def statement or not. if valid it must return the function name. if not valid it must return something that test false in an if statement. this is just one line being tested. the body of the function may not even be present. but the entire line must be a complete and valid def statement.