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

[Gribouillis]

Notice the following, which is syntactically correct but the : at the end of the first line is not what you think

>>> def foo(ages= { 'pam':
...     24,
...     'jim': 24,
...     }, a = 
...     print('spam')
...     ): pass
... 
spam
>>>