The coding guide recommends that any **kwargs dictionary that is passed
into a function should be copied so that the original is unaffected when
items are popped off inside the function. I noticed that this is not
done by pylab functions generated by boilerplate.py, and in fact I don't
think it is necessary:
In [9]:def test2(**kw):
...: first = kw.pop('a')
...: print first
...: print kw
...:
...:
In [10]:test2(**kw)
c
{'b': 'd'}
In [11]:kw
Out[11]:{'a': 'c', 'b': 'd'}
Popping the 'a' entry inside the function did not affect the dictionary
that was passed in; it evidently gets copied automatically.
Am I missing something? Or should I go ahead and strip out the extra
copies and modify the corresponding advice in CODING_GUIDE?
Eric
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