def __init__(self) -> None:
self._db_df = pd.read_csv(BILL_DATA_FILEPATH)
self._db_vects = joblib.load(DATABASE_VECTORS_FILEPATH).toarray().astype('float32')
self._texts_df = self._generate_text_dataframe()
self._tokenizer = MyTokenizer()
self._vectorizer = joblib.load(T2_VECTORIZER_FILEPATH)
self._ordinal_2_id = joblib.load(ORDINAL_2_ID_DICT_FILEPATH)
self._d = self._db_vects.shape[1]
self._index = faiss.IndexFlatL2(self._d)
self._index.add(self._db_vects)
def __init__(self) -> None:
self._db_df = pd.read_csv(BILL_DATA_FILEPATH)
self._db_vects = joblib.load(DATABASE_VECTORS_FILEPATH).toarray().astype('float32')
self._texts_df = self._generate_text_dataframe()
self._tokenizer = MyTokenizer()
self._vectorizer = joblib.load(T2_VECTORIZER_FILEPATH)
self._ordinal_2_id = joblib.load(ORDINAL_2_ID_DICT_FILEPATH)
self._d = self._db_vects.shape[1]
self._index = nmslib.init(method="hnsw", space="l2", data_type=nmslib.DataType.DENSE_VECTOR)
self._index.addDataPointBatch(self._db_vects)
self._index.createIndex(INDEX_TIME_PARAMS)
self._index.setQueryTimeParams({"efSearch": self._d})
def test_batch_segment():
import time
texts = [
"挖基坑土方 1.部位:沉箱 2.挖土深度:550mm",
"零星砌砖 1.LC15陶粒混凝土填充层 2.15厚1:3水泥砂浆保护层 3.钢筋混凝土楼板扫水泥浆一道 4.部位:沉箱",
"砌块墙 1.砌块品种、规格、强度等级:蒸压加气混凝土砌体 2.墙体类型:内墙 3.砂浆强度等级:预拌水泥砂浆M5.0 4.部位:变形缝",
"栏板 1.部位:盥洗池 2.混凝土强度等级:C20商品混凝土",
"现浇构件钢筋 1.钢筋种类、规格:圆钢φ10内",
"金属(塑钢)门 1.门代号及洞口尺寸:M1（900*2100） 2.门框、扇材质:不锈钢扣板、磨砂玻璃门 3.玻璃品种、厚度:磨砂钢化玻璃8mm",
"屋面卷材防水 1.卷材品种、规格、厚度:1.5厚合成高分子防水卷材 2.部位:屋面",
"楼面变形缝 1.嵌缝材料种类:聚乙烯泡沫塑料棒 2.阻火带:不燃材料阻火带 3.标准图集:中南标11ZJ111（5/A-8) 4.50*50*3mm不锈钢角钢 5.0.8mm不锈钢接水槽",
"保温隔热屋面 1.保温隔热材料品种、规格、厚度:SGK防水型隔热板（B节能型333×333×60mm厚度28mm30kg/m3） 2.结合层厚度、砂浆配合比:25mm1:4干硬性水泥砂浆",
"保温隔热屋面 1.找坡:30厚(最薄处)1:8憎水性膨胀珍珠岩找坡 2.工程部位:屋面"
]
tokenizer = MyTokenizer()
t0 = time.time()
for text in texts:
tokenizer.segment(text)
print("[INFO] Segment %d documents took %f seconds" % (len(texts), time.time() - t0))
class NmslibBillSearcher(object):
def __init__(self) -> None:
self._db_df = pd.read_csv(BILL_DATA_FILEPATH)
self._db_vects = joblib.load(DATABASE_VECTORS_FILEPATH).toarray().astype('float32')
self._texts_df = self._generate_text_dataframe()
self._tokenizer = MyTokenizer()
self._vectorizer = joblib.load(T2_VECTORIZER_FILEPATH)
self._ordinal_2_id = joblib.load(ORDINAL_2_ID_DICT_FILEPATH)
self._d = self._db_vects.shape[1]
self._index = nmslib.init(method="hnsw", space="l2", data_type=nmslib.DataType.DENSE_VECTOR)
self._index.addDataPointBatch(self._db_vects)
self._index.createIndex(INDEX_TIME_PARAMS)
self._index.setQueryTimeParams({"efSearch": self._d})
def _generate_text_dataframe(self) -> pd.DataFrame:
feature_cols = ['bill_name', 'bill_desc', 'unit']
texts_df = self._db_df.copy()
texts_df['bill_text'] = texts_df[feature_cols[0]].str.cat(
texts_df[feature_cols[1:]], sep=' '
)
texts_df.drop(columns=feature_cols, inplace=True)
return texts_df
def find_k_nearest_bills(self, query_texts: List[str], k: int = 5, num_threads: int = 4) -> List[pd.DataFrame]:
text_segmented = [self._tokenizer.segment(text) for text in query_texts]
query_vects = self._vectorizer.transform(text_segmented).toarray().astype('float32')
nbrs = self._index.knnQueryBatch(query_vects, k, num_threads)
results = []
for i, text in enumerate(query_texts):
ordinals, distances = nbrs[i]
distances = list(distances)
ids = [self._ordinal_2_id[ordinal] for ordinal in ordinals]
k_nearest_bills = pd.DataFrame()
if text in self._texts_df.bill_text.unique():
bill_id = int(self._db_df.loc[self._texts_df.bill_text == text].bill_id)
distances = [0] + distances
k_nearest_bills = pd.concat([k_nearest_bills, self._db_df.loc[self._db_df.bill_id == bill_id]], axis=0)
for _id in ids:
k_nearest_bills = pd.concat([k_nearest_bills, self._db_df.loc[self._db_df.bill_id == _id]], axis=0)
k_nearest_bills['distance'] = distances
k_nearest_bills.drop_duplicates(['bill_name', 'bill_desc', 'unit'], keep='first', inplace=True)
k_nearest_bills = k_nearest_bills.iloc[:k]
assert len(k_nearest_bills) == k
results.append(k_nearest_bills)
return results
@property
def d(self):
return self._d
class BillClassifier(object):
def __init__(self):
self._tokenizer = MyTokenizer()
self._vectorizer = joblib.load(T1_VECTORIZER_FILEPATH)
self._model = joblib.load(T1_MODEL_FILEPATH)
self._label_2_type = joblib.load(LABEL_2_TYPE_DICT_FILEPATH)
def _classify(self, texts: List[str]) -> List[int]:
texts_segmented = [self._tokenizer.segment(text) for text in texts]
return list(
self._model.predict(self._vectorizer.transform(texts_segmented)))
def classify_bill(self, texts: List[str]) -> List[str]:
labels = self._classify(texts)
return [self._label_2_type[label] for label in labels]
def __init__(self):
self._tokenizer = MyTokenizer()
self._vectorizer = joblib.load(T1_VECTORIZER_FILEPATH)
self._model = joblib.load(T1_MODEL_FILEPATH)
self._label_2_type = joblib.load(LABEL_2_TYPE_DICT_FILEPATH)
class FaissBillSearcher(object):
def __init__(self) -> None:
self._db_df = pd.read_csv(BILL_DATA_FILEPATH)
self._db_vects = joblib.load(DATABASE_VECTORS_FILEPATH).toarray().astype('float32')
self._texts_df = self._generate_text_dataframe()
self._tokenizer = MyTokenizer()
self._vectorizer = joblib.load(T2_VECTORIZER_FILEPATH)
self._ordinal_2_id = joblib.load(ORDINAL_2_ID_DICT_FILEPATH)
self._d = self._db_vects.shape[1]
self._index = faiss.IndexFlatL2(self._d)
self._index.add(self._db_vects)
def _generate_text_dataframe(self) -> pd.DataFrame:
feature_cols = ['bill_name', 'bill_desc', 'unit']
texts_df = self._db_df.copy()
texts_df['bill_text'] = texts_df[feature_cols[0]].str.cat(
texts_df[feature_cols[1:]], sep=' '
)
texts_df.drop(columns=feature_cols, inplace=True)
return texts_df
def _find_k_nearest_indexes(self, query_texts: List[str], k: int = 5) -> Tuple[np.ndarray, np.ndarray]:
text_segmented = [self._tokenizer.segment(text) for text in query_texts]
query_vects = self._vectorizer.transform(text_segmented).toarray().astype('float32')
D, I = self._index.search(query_vects, k)
return D, I
def find_k_nearest_texts(self, query_texts: List[str], k: int = 5) -> List[List[tuple]]:
_, I = self._find_k_nearest_indexes(query_texts, k)
ans = []
for text, ordinals in zip(query_texts, I):
ids = [self._ordinal_2_id[ordinal] for ordinal in ordinals]
k_nearest_texts = []
for _id in ids:
record = tuple(self._db_df.loc[self._db_df.bill_id == _id].values.ravel())
k_nearest_texts.append(record)
ans.append(k_nearest_texts)
return ans
def find_k_nearest_bills(self, query_texts: List[str], k: int = 5) -> List[pd.DataFrame]:
D, I = self._find_k_nearest_indexes(query_texts, k)
results = []
for i, text in enumerate(query_texts):
ordinals, distances = I[i], list(D[i])
ids = [self._ordinal_2_id[ordinal] for ordinal in ordinals]
k_nearest_bills = pd.DataFrame()
if text in self._texts_df.bill_text.unique():
bill_id = int(self._db_df.loc[self._texts_df.bill_text == text].bill_id)
distances = [0] + distances
k_nearest_bills = pd.concat(
[k_nearest_bills, self._db_df.loc[self._db_df.bill_id == bill_id]],
axis=0
)
for _id in ids:
k_nearest_bills = pd.concat(
[k_nearest_bills, self._db_df.loc[self._db_df.bill_id == _id]],
axis=0
)
k_nearest_bills['distance'] = distances
k_nearest_bills.drop_duplicates(['bill_name', 'bill_desc', 'unit'], keep='first', inplace=True)
k_nearest_bills = k_nearest_bills.iloc[:k]
assert len(k_nearest_bills) == k
results.append(k_nearest_bills)
return results
@property
def d(self):
return self._d