fix accept decorator bug

[corke2013]

This change fixes a bug in the accept decorator where using kwargs with the same parent key i.e. phq_labels=["label1", "label2", "label3"] and phq_labels__op="all" would result in a TypeError

Fix:

In [4]: for event in phq.events.search(phq_label=["agriculture-forestry-and-fisheries", "food-and-beverage"], phq_label__op="all").iter_all():
   ...:     print(event.phq_labels)
   ...:     break
   ...: 
[PHQLabels(label='food-and-beverage', weight=0.5), PHQLabels(label='hospitality-and-travel', weight=0.25), PHQLabels(label='agriculture-forestry-and-fisheries', weight=0.25)]

In [5]: for event in phq.events.search(phq_label=["agriculture-forestry-and-fisheries", "food-and-beverage"], phq_label__op="any").iter_all():
   ...:     print(event.phq_labels)
   ...:     break
   ...: 
[PHQLabels(label='nightlife', weight=0.354), PHQLabels(label='wellness', weight=0.335), PHQLabels(label='food-and-beverage', weight=0.311)]

[CockyAmoeba]

LGTM

[lpouvreau]

Awesome work @corke2013, thanks for fixing this 🙂