tonko22

from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, Float, ForeignKey, DateTime
from clickhouse_sqlalchemy import Table, make_session, get_declarative_base, types, engines
from sqlalchemy.orm import relationship
from sqlalchemy import create_engine, Column, MetaData, literal

engine = create_engine('clickhouse://default:@127.0.0.1:8123/test_db')
session = make_session(engine)
metadata = MetaData(bind=engine)
Base = get_declarative_base(metadata=metadata)

tonko22

"""
A weighted version of categorical_crossentropy for keras (2.0.6). This lets you apply a weight to unbalanced classes.
@url: https://gist.github.com/wassname/ce364fddfc8a025bfab4348cf5de852d
@author: wassname
"""
from keras import backend as K
def weighted_categorical_crossentropy(weights):
    """
    A weighted version of keras.objectives.categorical_crossentropy