dirty-loader 0.2.1

Dirty loader for python 3

dirty-loader

Easy to use loader library.

Changelog

Version 0.2.1

• Three types of instance definition allowed: string, structured and structure simplified.

Version 0.2.0

• Custom factories for classes.

• Default factories for logging package.

Version 0.1.0

• Some refactors.

• New function import_class.

Instalation

$ pip install dirty-loader

Documentation

http://dirty-loader.readthedocs.org

Main loaders

Loader

With Loader you could register sorted python modules. When you ask for a class it will try to load it for each module until it find one.

Example:

from dirty_loader import Loader

loader = Loader()
loader.register_module('tests.fake.namespace1')
loader.register_module('tests.fake.namespace2')
loader.register_module('tests.fake.namespace3')

klass = loader.load_class('FakeClass1')

from tests.fake.namespace1 import FakeClass1
assert klass == FakeClass1

# klass is tests.fake.namespace1.FakeClass1 because it exists in first module registered.
# Also, you could get an instance of class using factory
obj = loader.factory('FakeClass1', var1='a', var2=2)

# You could load classes from packages inside modules registered
klass = loader.load_class('subnamespace.FakeClass1')
from tests.fake.namespace3.subnamespace import FakeClass1 as SubFakeClass1
assert klass == SubFakeClass1
# klass is tests.fake.namespace3.subnamespace.FakeClass1 because it exists in first module registered.

LoaderReversed

It works in same way of Loader but it revers the sort when try to load a class.

Example:

from dirty_loader import LoaderReversed

loader = LoaderReversed()
loader.register_module('tests.fake.namespace1')
loader.register_module('tests.fake.namespace2')

klass = loader.load_class('FakeClass1')

from tests.fake.namespace2 import FakeClass1
assert klass == FakeClass1

# klass is tests.fake.namespace2.FakeClass1 because it exists in last module registered.

LoaderNamespace

With LoaderNamespace you could register sorted namespaces. When you ask for a class it will try to load it for each namespace until it find one. Each namespace has a python module associated. You could use the regular Loader way to load a class or you could specify the namespace you would like to use.

Example:

from dirty_loader import LoaderNamespace

loader = LoaderNamespace()
loader.register_namespace('fake1', 'tests.fake.namespace1')
loader.register_namespace('fake2', 'tests.fake.namespace2')

from tests.fake.namespace1 import FakeClass1, FakeClass2, FakeClass3

klass = loader.load_class('FakeClass1')

from tests.fake.namespace1 import FakeClass1
assert klass == FakeClass1
# klass is tests.fake.namespace1.FakeClass1 because it exists in last module registered.

# Also, you could get a class from specific namespace

klass = loader.load_class('FakeClass1', namespace='fake2)

from tests.fake.namespace2 import FakeClass1
assert klass == FakeClass1
# klass is tests.fake.namespace2.FakeClass1 because you specified it.

# Namespace could be specified in string class, too
klass = loader.load_class('fake2:FakeClass1')

assert klass == FakeClass1
# klass is tests.fake.namespace2.FakeClass1 because you specified it.

LoaderNamespaceReversed

It works in same way of LoaderNamespace but it revers the sort when try to load a class.

LoaderCached

A version of Loader with cache.

LoaderReversedCached

A version of LoaderReversed with cache.

LoaderNamespaceCached

A version of LoaderNamespace with cache.

LoaderNamespaceReversedCached

A version of LoaderNamespaceReversed with cache.