how to read from a sqlite db

sqlite.py

import pandas as pd
from sqlalchemy import create_engine # database connection
import datetime as dt
from IPython.display import display
import matplotlib
import numpy as np
import matplotlib.pyplot as plt
pd.set_option('display.max_columns', 120)
%matplotlib inline

# Read SQL engine from created db
disk_engine = create_engine('sqlite:///history.db')

# Execute SQL query and save to pandas dataframe
df_base = pd.read_sql_query('SELECT ' + ", ".join(cols_to_import) + ' FROM data', disk_engine)