gistfile1.txt

>>> def negate(f):
...   return lambda *args,**kwargs: not f(*args, **kwargs)
... 
>>> a = ["hello", "Hello there", "My name is"]
>>> def contains_space(s):
...   return " " in s
... 
>>> list(filter(contains_space, a))
['Hello there', 'My name is']
>>> list(filter(negate(contains_space), a))
['hello']
>>>