Package rdkit :: Package VLib :: Package NodeLib :: Module demo
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Source Code for Module rdkit.VLib.NodeLib.demo

 1  #  $Id$ 
 2  # 
 3  #  Copyright (C) 2003 Rational Discovery LLC 
 4  #     All Rights Reserved 
 5  # 
 6  from __future__ import print_function 
 7  from rdkit import RDConfig 
 8  from rdkit import Chem 
 9  import os.path 
10   
11  from rdkit.VLib.NodeLib import * 
12  from rdkit.VLib import Supply,Filter 
13   
14  # this would be a real input, from an sd file: 
15  #fName = os.path.join(RDConfig.RDCodeDir,'VLib','NodeLib','test_data','NCI_aids.10.dupes.sdf') 
16  #supplier = SDSupply.SDSupplyNode(fName) 
17  # instead though, we want a simpler input: 
18  smis = ['CCOC','CCO.Cl','CC(=O)[O-].[Na+]','CC[Cu]CC','OCC','C[N+](C)(C)C.[Cl-]', 
19          '[Na+].[Cl-]'] 
20  mols = [Chem.MolFromSmiles(x) for x in smis] 
21  # name the molecules (only needed because we built them from smiles): 
22  for i in range(len(mols)): 
23    mols[i].SetProp('Name','Mol-%d'%(i+1)) 
24  supplier = Supply.SupplyNode(contents=mols) 
25  # should be 7 here 
26  print('initial:',len([x for x in supplier])) 
27   
28  # filter out anything with a transition metal or lanthanide: 
29  metals = '[#21,#22,#23,#24,#25,#26,#27,#28,#29,#39,#40,#41,#42,#43,#44,#45,#46,#47,#57,#58,#59,#60,#61,#62,#63,#64,#65,#66,#67,#68,#69,#70,#71,#72,#73,#74,#75,#76,#77,#78,#79]' 
30  smaFilter= SmartsMolFilter.SmartsFilter(patterns=[metals],counts=[1]) 
31  smaFilter.SetNegate(1) 
32  smaFilter.AddParent(supplier) 
33  # should be 6 here 
34  print('post-smaFilter:',len([x for x in smaFilter])) 
35   
36  salts = ['[Cl;H1&X1,-]','[Na+]','[O;H2,H1&-,X0&-2]'] 
37  remover = SmartsRemover.SmartsRemover(patterns=salts) 
38  remover.AddParent(smaFilter) 
39  atsFilter = Filter.FilterNode(func=lambda x:x.GetNumAtoms()>1) 
40  atsFilter.AddParent(remover) 
41  # should be 5 here 
42  print('post-remover:',len([x for x in atsFilter])) 
43   
44  dupeFilter = SmilesDupeFilter.DupeFilter() 
45  dupeFilter.AddParent(atsFilter) 
46  # should be 4 here 
47  print('post-dupes:',len([x for x in dupeFilter])) 
48   
49   
50  import StringIO 
51  # a StringIO object acts like a file: 
52  io = StringIO.StringIO() 
53  output = SmilesOutput.OutputNode(dest=io,delim=', ',idField='Name') 
54  output.AddParent(dupeFilter) 
55  print('post-output:',len([x for x in output])) 
56  print('OUTPUT:') 
57  print(io.getvalue()) 
58