Authorize qualifier dictionaries in Dependency

[JulienBortolussiAda]

Accept a qualifier dictionary in Dependency. This dictionary can be formatted the old fashion (some qualifier are not present) or following the "args" schemes (the falg qualifier value is True or False).

It will require a corresponding patch in the specs to update the wrappers of Dependency.

[Nikokrock]

no need to cast on set

[JulienBortolussiAda]

The cast to set is way to copy it. Otherwise python complains because the size of the dictionary change during the iteration.

[grouigrokon]

To me it's ok. Using a set or a list seems to do the same.

>>> a = {1: "one", 2: "two", 3: "three"}
>>> for k in list(a.keys()):
...     a[1 + len(a)] = "something"
...     print(k)
... 
1
2
3
>>> a
{1: 'one', 2: 'two', 3: 'three', 4: 'something', 5: 'something', 6: 'something'}
>>> for k in a:
...     a[1 + len(a)] = "something"
...     print(k)
... 
1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
RuntimeError: dictionary changed size during iteration
>>>

[Nikokrock]

for q, v in qualifier.items()

[JulienBortolussiAda]

I cannot do that because I am changing the size of the dictionary in the loop (poping an element) and python doesn't like that.

[grouigrokon]

Ok with a set :

>>> a = {1: "one", 2: "two", 3: "three"}
>>> for k in set(a.keys()):
...     a[1 + len(a)] = "something"
...     print(k)
... 
1
2
3
>>> for k in a:
...     a[1 + len(a)] = "something"
...     print(k)
... 
1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
RuntimeError: dictionary changed size during iteration
>>> 

[grouigrokon]

As long as Nico does not have any other comment, and that your answers are right, I think we can approve the MR.