File: utils.py

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#
#  Copyright (c) 2016, Novartis Institutes for BioMedical Research Inc.
#  All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: 
#
#     * Redistributions of source code must retain the above copyright 
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
#       copyright notice, this list of conditions and the following 
#       disclaimer in the documentation and/or other materials provided 
#       with the distribution.
#     * Neither the name of Novartis Institutes for BioMedical Research Inc. 
#       nor the names of its contributors may be used to endorse or promote 
#       products derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Created by Nadine Schneider, July 2016


from rdkit import Chem
from rdkit.Chem import AllChem
from collections import defaultdict
import copy


def transferAgentsToReactants(rxn):
    for a in range(rxn.GetNumAgentTemplates()):
        agent = rxn.GetAgentTemplate(a)
        rxn.AddReactantTemplate(agent)

def removeAgentsAndTransferToReactants(rxn):
    tmp=[]
    rxn.RemoveAgentTemplates(tmp)
    for a in tmp:
        rxn.AddReactantTemplate(a)

def getNumPositiveCounts(fp):
    count=0
    for k,v in fp.GetNonzeroElements().items():
        if v > 0:
            count+=v
    return count

def getNumNegativeCounts(fp):
    count=0
    for k,v in fp.GetNonzeroElements().items():
        if v < 0:
            count+=abs(v)
    return count

def getNumPositiveBitCountsOfRadius0(fp,bitinfo):
    count=0
    bitsUnmappedAtoms=[]
    for k in bitinfo:
        if bitinfo[k][0][1] == 0:
            v = fp[k]
            if v>0:
                count += 1
                bitsUnmappedAtoms.append((k,v))
    return count,bitsUnmappedAtoms

def getSumFps(fps):
    summedFP = copy.deepcopy(fps[0])
    for fp in fps[1:]:
        summedFP += fp
    return summedFP

def uniqueMolecules(mols):
    smiles = [Chem.MolToSmiles(mol) for mol in mols]
    uniqueMolecules=defaultdict(int)
    for n,smi in enumerate(smiles):
        uniqueMolecules[n]=smiles.index(smi)
    return uniqueMolecules,smiles