Das deutsche Python-Forum

Code: Alles auswählen

#!/usr/bin/python

def pickle_decorator(f):
	def call_function(*args, **kwargs):
		pickle_data = "data read from pickled file"
		result = f(*args, __pickle_data = pickle_data, **kwargs)
		return result
	return call_function

@pickle_decorator
def test_function(*args, **kwargs):
	print "pickle:", kwargs["__pickle_data"]

test_function()

Code: Alles auswählen

def pickle_decorator(f):
   def call_function(*args, **kwargs):
      pickle_data = "data read from pickled file"
      return f(pickle_data, *args, **kwargs)
   return call_function

@pickle_decorator
def test_function(pickle_data):
   print "pickle:", pickle_data

test_function()

Code: Alles auswählen

class HasPickleData(object):
    def __init__(self, file):
        self.pickle_data = ...


class App(HasPickleData):
    def index(self):
        print self.pickle_data

Code: Alles auswählen

# irgendwo global
Session = scoped_session(sessionmaker("sqlite://"))

# ...
# wenn ich dann eine session benötige
sess = Session()
sess.close()

Code: Alles auswählen

class MyData(object):
    def __init__():
        self.conn = open_connection()

    def __enter__():
        return self.conn
        
    def __exit__():
        self.conn.close()
        
with MyData() as data:
    process(data)

Code: Alles auswählen

from contextlib import contextmanager

@contextmanager
def db_connection():
    connection = open_connection()
    try:
        yield connection
    finally:
        connection.close()