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generation.py
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generation.py
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import numpy as np
from nltk.translate.bleu_score import sentence_bleu
from nltk.translate.meteor_score import meteor_score
from tqdm import tqdm
from rouge_score import rouge_scorer
from rdkit import Chem, DataStructs
from rdkit.Chem import MACCSkeys, AllChem
from rdchiral.chiral import copy_chirality
from rdkit.Chem.AllChem import AssignStereochemistry
def calculate_nltk_scores(tokenizer, ans_strs, pred_strs):
delete_id = [i for i, x in enumerate(pred_strs) if x.strip() == '']
ans_strs = [x for i, x in enumerate(ans_strs) if i not in delete_id]
pred_strs = [x for i, x in enumerate(pred_strs) if i not in delete_id]
ans_str_tokens = [[[tokenizer.decode([s]) for s in tokenizer.encode(ans_str)[:1024]]] for ans_str in ans_strs]
pred_str_tokens = [[tokenizer.decode([s]) for s in tokenizer.encode(pred_str)[:1024]] for pred_str in pred_strs]
delete_id = [i for i in range(len(pred_str_tokens)) if len(pred_str_tokens[i]) == 0 or len(ans_str_tokens[i][0]) == 0]
ans_str_tokens = [ans_str_tokens[i] for i in range(len(ans_str_tokens)) if i not in delete_id]
pred_str_tokens = [pred_str_tokens[i] for i in range(len(pred_str_tokens)) if i not in delete_id]
bleu_2, bleu_4, meteor, scores = [], [], [], []
rouge = rouge_scorer.RougeScorer(['rouge1', 'rouge2', 'rougeL'], use_stemmer=True)
for i, (ans_str_token, pred_str_token) in tqdm(enumerate(zip(ans_str_tokens, pred_str_tokens)), total=len(ans_str_tokens)):
try:
bleu_2.append(sentence_bleu(ans_str_token, pred_str_token, weights=(0.5,0.5)))
except:
bleu_2.append(0)
try:
bleu_4.append(sentence_bleu(ans_str_token, pred_str_token, weights=(0.25,0.25,0.25,0.25)))
except:
bleu_4.append(0)
# meteor.append(meteor_score(ans_str_token, pred_str_token))
try:
scores.append(rouge.score(pred_strs[i], ans_strs[i]))
except:
continue
return {
'bleu_2': np.mean(bleu_2),
'bleu_4': np.mean(bleu_4),
'rouge_1': np.mean([score['rouge1'].fmeasure for score in scores]),
'rouge_2': np.mean([score['rouge2'].fmeasure for score in scores]),
'rouge_l': np.mean([score['rougeL'].fmeasure for score in scores]),
# 'meteor': np.mean(meteor)
}
# Molecule Generation
def calculate_smiles_metrics(
preds_smiles_list,
golds_smiles_list,
metrics=('exact_match', 'fingerprint')
):
num_all = len(preds_smiles_list)
assert num_all > 0
assert num_all == len(golds_smiles_list)
k = len(preds_smiles_list[0])
dk_pred_smiles_list_dict = {}
dk_pred_no_answer_labels_dict = {}
dk_pred_invalid_labels_dict = {}
for dk in range(k):
dk_pred_smiles_list_dict[dk] = []
dk_pred_no_answer_labels_dict[dk] = []
dk_pred_invalid_labels_dict[dk] = []
for pred_smiles_list in tqdm(preds_smiles_list, desc='preds_smiles_list'):
if pred_smiles_list is None or len(pred_smiles_list) == 0:
for dk in range(k):
dk_pred_no_answer_labels_dict[dk].append(True)
dk_pred_invalid_labels_dict[dk].append(False)
dk_pred_smiles_list_dict[dk].append(None)
continue
assert len(pred_smiles_list) == k
for dk, item in enumerate(pred_smiles_list):
item = item.strip()[:2048]
if item == '' or item is None:
item = None
dk_pred_no_answer_labels_dict[dk].append(True)
dk_pred_invalid_labels_dict[dk].append(False)
else:
dk_pred_no_answer_labels_dict[dk].append(False)
try:
item = canonicalize_molecule_smiles(item)
except:
item = None
if item is None:
dk_pred_invalid_labels_dict[dk].append(True)
else:
dk_pred_invalid_labels_dict[dk].append(False)
dk_pred_smiles_list_dict[dk].append(item)
new_list = []
for gold_smiles_list in tqdm(golds_smiles_list, desc='canonicalize gold smiles'):
sample_gold_smiles_list = []
for gold in gold_smiles_list:
item = gold.strip()
new_item = canonicalize_molecule_smiles(item, return_none_for_error=False)
# if new_item is None:
# new_item = item #TODO
# assert new_item is not None, item
sample_gold_smiles_list.append(new_item)
new_list.append(sample_gold_smiles_list)
golds_smiles_list = new_list
metric_results = {'num_all': num_all}
tk_pred_no_answer_labels = np.array([True] * num_all)
tk_pred_invalid_labels = np.array([True] * num_all)
for dk in range(k):
dk_no_answer_labels = dk_pred_no_answer_labels_dict[dk]
dk_invalid_labels = dk_pred_invalid_labels_dict[dk]
tk_pred_no_answer_labels = tk_pred_no_answer_labels & dk_no_answer_labels
tk_pred_invalid_labels = tk_pred_invalid_labels & dk_invalid_labels
metric_results['num_t%d_no_answer' % (dk + 1)] = tk_pred_no_answer_labels.sum().item()
metric_results['num_t%d_invalid' % (dk + 1)] = tk_pred_invalid_labels.sum().item()
# d1_no_answer_labels = dk_pred_no_answer_labels_dict[0]
# # print(np.array(d1_no_answer_labels).sum().item())
# for label, item in zip(d1_no_answer_labels, preds_smiles_list):
# if label:
# print(item)
for metric in metrics:
if metric == 'exact_match':
tk_exact_match_labels = np.array([False] * num_all)
for dk in range(k):
dk_pred_smiles_list = dk_pred_smiles_list_dict[dk]
dk_exact_match_labels = judge_exact_match(dk_pred_smiles_list, golds_smiles_list)
tk_exact_match_labels = tk_exact_match_labels | dk_exact_match_labels
metric_results['num_t%d_exact_match' % (dk + 1)] = tk_exact_match_labels.sum().item()
elif metric == 'fingerprint':
d1_pred_mol_list = []
gold_mols_list = []
for pred_smiles, gold_smiles_list, no_answer, invalid in zip(dk_pred_smiles_list_dict[0], golds_smiles_list, dk_pred_no_answer_labels_dict[0], dk_pred_invalid_labels_dict[0]):
if pred_smiles is None or pred_smiles.strip() == '' or no_answer is True or invalid is True:
continue
pred_mol = Chem.MolFromSmiles(pred_smiles)
# if pred_mol is None: # TODO
# continue
assert pred_mol is not None, pred_smiles
gold_mol_list = []
for gold_smiles in gold_smiles_list:
gold_mol = Chem.MolFromSmiles(gold_smiles)
# if gold_mol is None:
# continue # TODO
assert gold_mol is not None, gold_smiles
gold_mol_list.append(gold_mol)
# if len(gold_mol_list) == 0:
# continue # TODO
d1_pred_mol_list.append(pred_mol)
gold_mols_list.append(gold_mol_list)
maccs_sims_score, rdk_sims_score, morgan_sims_score = calculate_fingerprint_similarity(d1_pred_mol_list, gold_mols_list)
metric_results['t1_maccs_fps'] = maccs_sims_score
metric_results['t1_rdk_fps'] = rdk_sims_score
metric_results['t1_morgan_fps'] = morgan_sims_score
elif metric == 'multiple_match':
tk_intersection_labels = np.array([False] * num_all)
tk_subset_labels = np.array([False] * num_all)
for dk in range(k):
dk_intersection_labels, dk_subset_labels = judge_multiple_match(dk_pred_smiles_list_dict[dk], golds_smiles_list)
tk_intersection_labels = tk_intersection_labels | dk_intersection_labels
tk_subset_labels = tk_subset_labels | dk_subset_labels
metric_results['num_t%d_subset' % (dk + 1)] = tk_intersection_labels.sum().item()
metric_results['num_t%d_intersection' % (dk + 1)] = tk_intersection_labels.sum().item()
else:
raise ValueError(metric)
return metric_results
def convert_smiles_list_into_mol_list(smiles_list):
# 将smiles列表转换为rdkit的mol列表
mol_list = []
no_answer_labels = []
invalid_labels = []
for smiles in smiles_list:
if smiles == '':
mol = 'NA'
no_answer_labels.append(True)
else:
mol = Chem.MolFromSmiles(smiles)
if mol is None:
mol = 'INVALID'
invalid_labels.append(True)
mol_list.append(mol)
no_answer_labels = np.array(no_answer_labels)
invalid_labels = np.arange(invalid_labels)
return mol_list, no_answer_labels, invalid_labels
def get_molecule_id(smiles, remove_duplicate=True):
if remove_duplicate:
assert ';' not in smiles
all_inchi = set()
for part in smiles.split('.'):
inchi = get_molecule_id(part, remove_duplicate=False)
all_inchi.add(inchi)
all_inchi = tuple(sorted(all_inchi))
return all_inchi
else:
mol = Chem.MolFromSmiles(smiles)
return Chem.MolToInchi(mol)
def judge_exact_match(pred_can_smiles_list, gold_can_smiles_list):
# 判断预测的smiles是否和真实的smiles完全一致
assert len(pred_can_smiles_list) == len(gold_can_smiles_list)
exact_match_labels = []
for pred_smiles, gold_smiles_list in zip(pred_can_smiles_list, gold_can_smiles_list):
if pred_smiles is None:
exact_match_labels.append(False)
continue
pred_smiles_inchi = get_molecule_id(pred_smiles)
sample_exact_match = False
for gold_smiles in gold_smiles_list:
if gold_smiles is None:
break
gold_smiles_inchi = get_molecule_id(gold_smiles)
if pred_smiles_inchi == gold_smiles_inchi:
sample_exact_match = True
break
exact_match_labels.append(sample_exact_match)
return np.array(exact_match_labels)
def calculate_fingerprint_similarity(pred_mol_list, gold_mols_list, morgan_r=2):
# 计算预测分子与真实分子指纹相似度
assert len(pred_mol_list) == len(gold_mols_list)
MACCS_sims = []
morgan_sims = []
RDK_sims = []
for pred_mol, gold_mol_list in zip(pred_mol_list, gold_mols_list):
if pred_mol is None or type(pred_mol) == str:
raise ValueError(type(pred_mol))
tmp_MACCS, tmp_RDK, tmp_morgan = 0, 0, 0
for gold_mol in gold_mol_list:
tmp_MACCS = max(tmp_MACCS, DataStructs.FingerprintSimilarity(MACCSkeys.GenMACCSKeys(gold_mol), MACCSkeys.GenMACCSKeys(pred_mol), metric=DataStructs.TanimotoSimilarity))
tmp_RDK = max(tmp_RDK, DataStructs.FingerprintSimilarity(Chem.RDKFingerprint(gold_mol), Chem.RDKFingerprint(pred_mol), metric=DataStructs.TanimotoSimilarity))
tmp_morgan = max(tmp_morgan, DataStructs.TanimotoSimilarity(AllChem.GetMorganFingerprint(gold_mol,morgan_r), AllChem.GetMorganFingerprint(pred_mol, morgan_r)))
MACCS_sims.append(tmp_MACCS)
RDK_sims.append(tmp_RDK)
morgan_sims.append(tmp_morgan)
maccs_sims_score = np.mean(MACCS_sims)
rdk_sims_score = np.mean(RDK_sims)
morgan_sims_score = np.mean(morgan_sims)
return maccs_sims_score, rdk_sims_score, morgan_sims_score
def judge_multiple_match(pred_can_smiles_list, golds_can_smiles_list):
assert len(pred_can_smiles_list) == len(golds_can_smiles_list)
subset_labels = []
intersection_labels = []
for pred_smiles, gold_smiles_list in zip(pred_can_smiles_list, golds_can_smiles_list):
if pred_smiles is None:
subset_labels.append(False)
intersection_labels.append(False)
continue
pred_ele_set = set()
for smiles in pred_smiles.split('.'):
pred_ele_set.add(get_molecule_id(smiles, remove_duplicate=False))
intersection_label = False
subset_label = False
for gold_smiles in gold_smiles_list:
assert gold_smiles is not None
gold_ele_set = set()
for smiles in gold_smiles.split('.'):
gold_ele_set.add(get_molecule_id(smiles, remove_duplicate=False))
if len(pred_ele_set & gold_ele_set) > 0:
intersection_label = True
g_p = gold_ele_set - pred_ele_set
if len(g_p) >= 0 and len(pred_ele_set - gold_ele_set) == 0:
subset_label = True
break
intersection_labels.append(intersection_label)
subset_labels.append(subset_label)
return intersection_labels, subset_labels
def canonicalize(smiles, isomeric=False, canonical=True, kekulize=False):
# When canonicalizing a SMILES string, we typically want to
# run Chem.RemoveHs(mol), but this will try to kekulize the mol
# which is not required for canonical SMILES. Instead, we make a
# copy of the mol retaining only the information we desire (not explicit Hs)
# Then, we sanitize the mol without kekulization. copy_atom and copy_edit_mol
# Are used to create this clean copy of the mol.
def copy_atom(atom):
new_atom = Chem.Atom(atom.GetSymbol())
new_atom.SetFormalCharge(atom.GetFormalCharge())
if atom.GetIsAromatic() and atom.GetNoImplicit():
new_atom.SetNumExplicitHs(atom.GetNumExplicitHs())
#elif atom.GetSymbol() == 'N':
# print(atom.GetSymbol())
# print(atom.GetImplicitValence())
# new_atom.SetNumExplicitHs(-atom.GetImplicitValence())
#elif atom.GetSymbol() == 'S':
# print(atom.GetSymbol())
# print(atom.GetImplicitValence())
return new_atom
def copy_edit_mol(mol):
new_mol = Chem.RWMol(Chem.MolFromSmiles(''))
for atom in mol.GetAtoms():
new_atom = copy_atom(atom)
new_mol.AddAtom(new_atom)
for bond in mol.GetBonds():
a1 = bond.GetBeginAtom().GetIdx()
a2 = bond.GetEndAtom().GetIdx()
bt = bond.GetBondType()
new_mol.AddBond(a1, a2, bt)
new_bond = new_mol.GetBondBetweenAtoms(a1, a2)
new_bond.SetBondDir(bond.GetBondDir())
new_bond.SetStereo(bond.GetStereo())
for new_atom in new_mol.GetAtoms():
atom = mol.GetAtomWithIdx(new_atom.GetIdx())
copy_chirality(atom, new_atom)
return new_mol
smiles = smiles.replace(" ", "")
tmp = Chem.MolFromSmiles(smiles, sanitize=False)
tmp.UpdatePropertyCache()
new_mol = copy_edit_mol(tmp)
#Chem.SanitizeMol(new_mol, sanitizeOps=Chem.SanitizeFlags.SANITIZE_ALL)
if not kekulize:
Chem.SanitizeMol(new_mol, sanitizeOps=Chem.SanitizeFlags.SANITIZE_SETAROMATICITY | Chem.SanitizeFlags.SANITIZE_PROPERTIES | Chem.SanitizeFlags.SANITIZE_ADJUSTHS, catchErrors=True)
else:
Chem.SanitizeMol(new_mol, sanitizeOps=Chem.SanitizeFlags.SANITIZE_KEKULIZE | Chem.SanitizeFlags.SANITIZE_PROPERTIES | Chem.SanitizeFlags.SANITIZE_ADJUSTHS, catchErrors=True)
AssignStereochemistry(new_mol, cleanIt=False, force=True, flagPossibleStereoCenters=True)
new_smiles = Chem.MolToSmiles(new_mol, isomericSmiles=isomeric, canonical=canonical)
return new_smiles
def canonicalize_molecule_smiles(smiles, return_none_for_error=True, skip_mol=False, sort_things=True, isomeric=True, kekulization=True, allow_empty_part=False):
things = smiles.split('.')
if skip_mol:
new_things = things
else:
new_things = []
for thing in things:
try:
if thing == '' and not allow_empty_part:
raise ValueError(f'SMILES {smiles} contains empty part.')
mol = Chem.MolFromSmiles(thing)
if mol is None:
return None
for atom in mol.GetAtoms():
atom.SetAtomMapNum(0)
thing_smiles = Chem.MolToSmiles(mol, kekuleSmiles=False, isomericSmiles=isomeric)
thing_smiles = Chem.MolFromSmiles(thing_smiles)
thing_smiles = Chem.MolToSmiles(thing_smiles, kekuleSmiles=False, isomericSmiles=isomeric)
thing_smiles = Chem.MolFromSmiles(thing_smiles)
thing_smiles = Chem.MolToSmiles(thing_smiles, kekuleSmiles=False, isomericSmiles=isomeric)
if thing_smiles is None:
return None
can_in = thing_smiles
can_out = canonicalize(thing_smiles, isomeric=isomeric)
if can_out is None:
can_out = can_in
thing_smiles = can_out
if kekulization:
thing_smiles = keku_mid = Chem.MolFromSmiles(thing_smiles)
assert keku_mid is not None, 'Before can: %s\nAfter can: %s' % (can_in, can_out)
thing_smiles = Chem.MolToSmiles(thing_smiles, kekuleSmiles=True, isomericSmiles=isomeric)
except KeyboardInterrupt:
raise
except:
if return_none_for_error:
return None
else:
raise
new_things.append(thing_smiles)
if sort_things:
new_things = sorted(new_things)
new_things = '.'.join(new_things)
return new_things