def __createBuilder( target, source, env ) :
# create the database connection and set the transaction
engine = None
metadata = None
connect = None
transaction = None
try :
engine = sqlalchemy.create_engine(env["connection"], echo = env.get("DATABASE_VERBOSE", False) )
metadata = sqlalchemy.MetaData()
connect = engine.connect()
transaction = sqlalchemy.sessionmaker(autocommit=False)
except Exception, e :
raise SCons.Errors.StopError( e )
def connect(self):
try:
engine = create_engine(
"mysql+pymysql://%(user)s:%(pass)s@%(host)s:%(port)s/%(name)s" %
{
"host": urllib.quote(
self.db_host), "port": self.db_port, "name": urllib.quote(
self.db_name), "user": urllib.quote(
self.db_user), "pass": urllib.quote(
self.db_pass)}, convert_unicode=True)
table_map = TableMap()
table_map.mapping(engine)
Session = sessionmaker(bind=engine)
return Session()
except Exception:
raise
CONN_STR = '…'
engine = create_engine('sqlite:////home/friend/01-github/dw2ed/bd/python/load_existing_db/companies_1000.db')
metadata = MetaData()
insp = inspect(engine)
print(insp.get_table_names())
companias = Table('compania', metadata,
sa.Column("n", sa.String(50), primary_key=True),
sa.Column("nome", sa.String(50)),
sa.Column("dominio", sa.String(50)),
sa.Column("ano", sa.String(50)),
sa.Column("industria", sa.String(50)),
sa.Column("tamanho", sa.String(50)),
sa.Column("localizacao", sa.String(50)),
sa.Column("pais", sa.String(50)),
sa.Column("linkedin", sa.String(250)),
sa.Column("empregados_atual", sa.Integer),
sa.Column("empregados_total", sa.Integer)
)
with engine.connect() as conn:
query = 'select * from compania'
for row in conn.execute(query):
print(row)
Session = sa.sessionmaker(bind=engine)
session = Session()
from sqlalchemy import create_engine
from sqlalchemy import scoped_session, sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from config import SQLALCHEMY_DATABASE_URI
engine = create_engine(SQLALCHEMY_DATABASE_URI, convert_unicode=True)
db_session = scoped_session(sessionmaker(autocommit=False,
autoflush=False,
bind=engine))
Base = declarative_base()
Base.query= db_session.query_property()
def init_db():
from app.models import Video
from app.models import User
from app.models import Comment
from app.models import News
from app.models import Histroy
Base.metadata.create_all(bind=engine)
#!/usr/bin/python3
"""
=========================================================================
script that prints the first State object from the database hbtn_0e_6_usa
=========================================================================
"""
from model_state import Base, State
from sqlalchemy import create_engine
from sqlalchemy import sessionmaker
import sys
if __name__ == "__main__":
engine = create_engine('mysql+mysqldb://{}:{}@localhost/{}'.format(
sys.argv[1], sys.argv[2], sys.argv[3]),
pool_pre_ping=True)
the_session = sessionmaker(bind=engine)
session = the_session()
el_primerito = session.query(State).first()
if el_primerito is None:
print("Nothing")
else:
print("{}: {}".format(el_primerito.id, el_primerito.name))
#!/usr/bin/python3
''' Create the state model from table states '''
from sqlalchemy import create_engine, sessionmaker
from states import State
if __name__ == '__main__':
engine = create_engine("mysql+mysqldb://root:root@localhost/hbtn_0e_6_usa")
Session = sessionmaker(engine)
session = Session()
states = session.query(State).order_by(State.id)
for state in states:
print(state.name)
import OS
from sqlalchemy import create_engine
from sqlalchemy import scoped_session,sessionmaker
engine = create_engine(os.getenv("DATABASE_URL"))
db = scoped_session(sessionmaker(bind = engine))
def main():
flights = db.execute("SELECT origin, destination, duration FROM flights").fetchall()
for flight in flights:
print(f"{flight.origin} to {flight.destination}, {flight.duration} minutes")
if __name__ = "__main__":
main()
import numpy as np
import pandas.DataFrame
db = create_engine('sqlite:///forjar.db')
metadata = MetaData(db)
users = Table('Users', metadata, autoload=True)
s = users.select()
rs = s.execute()
campaign_to_num = {'TW': 1, 'RE': 2, 'FB': 3, 'PI': 4}
campaigns = []
Session = sessionmaker(bind=some_engine)
session = Session()
q = session.query(users)
x = np.array(campaigns)
n, bins, patches = plt.hist(x, bins=4, label=['TW', 'RE', 'FB', 'PI'])
plt.xlabel('Campaigns ')
plt.ylabel('Number')
plt.title('Histogram of Users from Different Campaigns')
plt.grid(True)
plt.show()
print x
from sqlalchemy import create_engine
from sqlalchemy import sessionmaker
from database_setup import Base, Restaurant, MenuItem
# Point the DB we want to comunicate
engine = create_engine('sqlite:///restaurantmenu.db')
# Bind engine to `Base` class.
# Connects our classes definitions to tables in the DB
Base.metadata.bind = engine
# Create a session object to connect to the DB
DBSession = sessionmaker(bind=engine)
session = DBSession()
# New row in `restaurant` table (instance of our `Restaurant` class)
myRestaurant = Restaurant(name='Pizza Palace')
# Add changes to staging zone
session.add(myRestaurant)
# New row in `menu_item` table (instance of our `MenuItem` class).
# Includes a Foreign key reference
cheese_pizza = MenuItem(name='Cheese Pizza',
description='Made with four types of cheese!',
course='Entree',
price='$8.99',
restaurant=myRestaurant)
# Add changes to staging zone
session.add(cheese_pizza)
def __init__(self):
self.engine = create_engine('sqlite://')
self.conn = self.engine.connect()
Session = sessionmaker(bind=self.engine)
self.session
users = Table('Users', metadata, autoload=True)
s = users.select()
rs = s.execute()
campaign_to_num = {
'TW' : 1,
'RE' : 2,
'FB' : 3,
'PI' : 4
}
campaigns = []
Session = sessionmaker(bind=some_engine)
session = Session()
q = session.query(users)
x = np.array(campaigns)
n, bins, patches = plt.hist(x,bins=4,label=['TW', 'RE', 'FB','PI'])
plt.xlabel('Campaigns ')
plt.ylabel('Number')
plt.title('Histogram of Users from Different Campaigns')