rdkit.VLib.Filter module¶
- class rdkit.VLib.Filter.FilterNode(func=None, negate=0, **kwargs)¶
Bases:
VLibNode
base class for nodes which filter their input
Assumptions:
filter function takes a number of arguments equal to the number of inputs we have. It returns a bool
inputs (parents) can be stepped through in lockstep
we return a tuple if there’s more than one input
Usage Example:
>>> from rdkit.VLib.Supply import SupplyNode >>> def func(a,b): ... return a+b < 5 >>> filt = FilterNode(func=func) >>> suppl1 = SupplyNode(contents=[1,2,3,3]) >>> suppl2 = SupplyNode(contents=[1,2,3,1]) >>> filt.AddParent(suppl1) >>> filt.AddParent(suppl2) >>> v = [x for x in filt] >>> v [(1, 1), (2, 2), (3, 1)] >>> filt.reset() >>> v = [x for x in filt] >>> v [(1, 1), (2, 2), (3, 1)] >>> filt.Destroy()
Negation is also possible:
>>> filt = FilterNode(func=func,negate=1) >>> suppl1 = SupplyNode(contents=[1,2,3,3]) >>> suppl2 = SupplyNode(contents=[1,2,3,1]) >>> filt.AddParent(suppl1) >>> filt.AddParent(suppl2) >>> v = [x for x in filt] >>> v [(3, 3)] >>> filt.Destroy()
With no function, just return the inputs:
>>> filt = FilterNode() >>> suppl1 = SupplyNode(contents=[1,2,3,3]) >>> filt.AddParent(suppl1) >>> v = [x for x in filt] >>> v [1, 2, 3, 3] >>> filt.Destroy()
- Negate()¶
- SetNegate(state)¶
- next()¶
part of the iterator interface
raises StopIteration on failure