pop(k[, d]) → v, remove specified key and return the corresponding value.¶
If key is not found, d is returned if given, otherwise KeyError is raised
popitem() → (k, v), remove and return some (key, value) pair as a¶
2-tuple; but raise KeyError if D is empty.
setdefault(k[, d]) → D.get(k,d), also set D[k]=d if k not in D¶
update(E, **F) → None. Update D from dict/iterable E and F.¶
If E has a .keys() method, does: for k in E: D[k] = E[k]
If E lacks .keys() method, does: for (k, v) in E: D[k] = v
In either case, this is followed by: for k in F: D[k] = F[k]