can itertools compact a list removing all of some value?

[perfringo]

It's usually dangerous to mutate the list while iterating over it. But if you know what are you doing then...

Simple code to remove elements in place (starting from end in order not to mess indices):

>>> test = [None, 'b', None, 'a', None]
>>> for i in range(len(test) - 1, -1, -1):
...     if test[i] == None:
...         del test[i]
...
>>> test
['b', 'a']