mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2024-11-25 11:04:01 +03:00
making pep257 and flake8 happy
This commit is contained in:
Roman Mogilatov
parent
36b1413868
commit
e1f2d5e3b8
|
|
@ -1,6 +1,4 @@
|
|||
"""
|
||||
`Objects` library.
|
||||
"""
|
||||
"""Objects."""
|
||||
|
||||
from .catalog import AbstractCatalog, overrides
|
||||
from .providers import (Provider, NewInstance, Singleton, Class, Object,
|
||||
|
|
@ -8,11 +6,11 @@ from .providers import (Provider, NewInstance, Singleton, Class, Object,
|
|||
from .injections import InitArg, Attribute, Method
|
||||
|
||||
|
||||
__all__ = ['AbstractCatalog', 'overrides',
|
||||
__all__ = ('AbstractCatalog', 'overrides',
|
||||
|
||||
# Providers
|
||||
'Provider', 'NewInstance', 'Singleton', 'Class',
|
||||
'Object', 'Function', 'Value',
|
||||
|
||||
# Injections
|
||||
'InitArg', 'Attribute', 'Method']
|
||||
'InitArg', 'Attribute', 'Method')
|
||||
|
|
|
|||
|
|
@ -1,28 +1,18 @@
|
|||
"""
|
||||
Catalog module.
|
||||
"""
|
||||
"""Catalog module."""
|
||||
|
||||
from .providers import Provider
|
||||
|
||||
|
||||
class AbstractCatalog(object):
|
||||
"""
|
||||
Abstract object provides catalog.
|
||||
"""
|
||||
|
||||
"""Abstract object provides catalog."""
|
||||
|
||||
def __init__(self, *used_providers):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
self.__used_providers__ = set(used_providers)
|
||||
|
||||
def __getattribute__(self, item):
|
||||
"""
|
||||
Returns providers.
|
||||
|
||||
:param item:
|
||||
:return:
|
||||
"""
|
||||
"""Return providers."""
|
||||
attribute = super(AbstractCatalog, self).__getattribute__(item)
|
||||
if item in ('__used_providers__',):
|
||||
return attribute
|
||||
|
|
@ -34,9 +24,7 @@ class AbstractCatalog(object):
|
|||
|
||||
@classmethod
|
||||
def __all_providers__(cls, provider_type=Provider):
|
||||
"""
|
||||
Returns set of all class providers.
|
||||
"""
|
||||
"""Return set of all class providers."""
|
||||
providers = set()
|
||||
for attr_name in set(dir(cls)) - set(dir(AbstractCatalog)):
|
||||
provider = getattr(cls, attr_name)
|
||||
|
|
@ -48,23 +36,18 @@ class AbstractCatalog(object):
|
|||
@classmethod
|
||||
def __override___(cls, overriding):
|
||||
"""
|
||||
Overrides current catalog providers by overriding catalog providers.
|
||||
Override current catalog providers by overriding catalog providers.
|
||||
|
||||
:param overriding: AbstractCatalog
|
||||
"""
|
||||
overriden = overriding.__all_providers__() - cls.__all_providers__()
|
||||
for name, provider in overriden:
|
||||
overridden = overriding.__all_providers__() - cls.__all_providers__()
|
||||
for name, provider in overridden:
|
||||
overridden_provider = getattr(cls, name)
|
||||
overridden_provider.__override__(provider)
|
||||
|
||||
|
||||
def overrides(catalog):
|
||||
"""
|
||||
Catalog overriding decorator.
|
||||
|
||||
:param catalog:
|
||||
:return:
|
||||
"""
|
||||
"""Catalog overriding decorator."""
|
||||
def decorator(overriding_catalog):
|
||||
catalog.__override___(overriding_catalog)
|
||||
return overriding_catalog
|
||||
|
|
|
|||
|
|
@ -1,43 +1,33 @@
|
|||
"""
|
||||
Injections module.
|
||||
"""
|
||||
"""Injections module."""
|
||||
|
||||
|
||||
class Injection(object):
|
||||
"""
|
||||
Base injection class.
|
||||
"""
|
||||
|
||||
"""Base injection class."""
|
||||
|
||||
def __init__(self, name, injectable):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
self.name = name
|
||||
self.injectable = injectable
|
||||
|
||||
@property
|
||||
def value(self):
|
||||
"""
|
||||
Returns injectable value.
|
||||
"""
|
||||
"""Return injectable value."""
|
||||
if hasattr(self.injectable, '__is_objects_provider__'):
|
||||
return self.injectable()
|
||||
return self.injectable
|
||||
|
||||
|
||||
class InitArg(Injection):
|
||||
"""
|
||||
Init argument injection.
|
||||
"""
|
||||
|
||||
"""Init argument injection."""
|
||||
|
||||
|
||||
class Attribute(Injection):
|
||||
"""
|
||||
Attribute injection.
|
||||
"""
|
||||
|
||||
"""Attribute injection."""
|
||||
|
||||
|
||||
class Method(Injection):
|
||||
"""
|
||||
Method injection.
|
||||
"""
|
||||
|
||||
"""Method injection."""
|
||||
|
|
|
|||
|
|
@ -1,6 +1,4 @@
|
|||
"""
|
||||
Standard providers.
|
||||
"""
|
||||
"""Standard providers."""
|
||||
|
||||
from collections import Iterable
|
||||
from .injections import (
|
||||
|
|
@ -12,46 +10,35 @@ from .injections import (
|
|||
|
||||
|
||||
class Provider(object):
|
||||
"""
|
||||
Base provider class.
|
||||
"""
|
||||
|
||||
"""Base provider class."""
|
||||
|
||||
__is_objects_provider__ = True
|
||||
__overridden_by__ = list()
|
||||
|
||||
def __init__(self):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
self.__overridden_by__ = list()
|
||||
|
||||
def __call__(self, *args, **kwargs):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
raise NotImplementedError()
|
||||
|
||||
def __override__(self, provider):
|
||||
"""
|
||||
Overrides provider with another provider.
|
||||
"""
|
||||
"""Override provider with another provider."""
|
||||
self.__overridden_by__.append(provider)
|
||||
|
||||
def delegate(self):
|
||||
"""
|
||||
Returns provider delegate.
|
||||
"""
|
||||
"""Return provider delegate."""
|
||||
return ProviderDelegate(self)
|
||||
|
||||
|
||||
class ProviderDelegate(Provider):
|
||||
"""
|
||||
Provider's delegate.
|
||||
"""
|
||||
|
||||
"""Provider's delegate."""
|
||||
|
||||
def __init__(self, delegated):
|
||||
"""
|
||||
Initializer.
|
||||
"""Initializer.
|
||||
|
||||
:type delegated: Provider
|
||||
"""
|
||||
|
|
@ -59,153 +46,116 @@ class ProviderDelegate(Provider):
|
|||
super(ProviderDelegate, self).__init__()
|
||||
|
||||
def __call__(self):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
return self.delegated.__call__
|
||||
|
||||
|
||||
def prepare_injections(injections):
|
||||
"""
|
||||
Prepares injections list to injection.
|
||||
"""
|
||||
return [(injection.name, injection.value) for injection in injections]
|
||||
|
||||
|
||||
def fetch_injections(injections, injection_type):
|
||||
"""
|
||||
Fetches injections of injection type from list.
|
||||
"""
|
||||
return tuple([injection
|
||||
for injection in injections
|
||||
if isinstance(injection, injection_type)])
|
||||
|
||||
|
||||
class NewInstance(Provider):
|
||||
"""
|
||||
|
||||
"""New instance provider.
|
||||
|
||||
New instance providers will create and return new instance on every call.
|
||||
"""
|
||||
|
||||
def __init__(self, provides, *injections):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
self.provides = provides
|
||||
self.init_injections = fetch_injections(injections, InitArg)
|
||||
self.attribute_injections = fetch_injections(injections, Attribute)
|
||||
self.method_injections = fetch_injections(injections, Method)
|
||||
self.init_injections = _fetch_injections(injections, InitArg)
|
||||
self.attribute_injections = _fetch_injections(injections, Attribute)
|
||||
self.method_injections = _fetch_injections(injections, Method)
|
||||
super(NewInstance, self).__init__()
|
||||
|
||||
def __call__(self, *args, **kwargs):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
if self.__overridden_by__:
|
||||
return self.__overridden_by__[-1].__call__(*args, **kwargs)
|
||||
|
||||
init_injections = prepare_injections(self.init_injections)
|
||||
init_injections = dict(init_injections)
|
||||
init_injections = dict(((injection.name, injection.value)
|
||||
for injection in self.init_injections))
|
||||
init_injections.update(kwargs)
|
||||
|
||||
provided = self.provides(*args, **init_injections)
|
||||
instance = self.provides(*args, **init_injections)
|
||||
|
||||
attribute_injections = prepare_injections(self.attribute_injections)
|
||||
for name, injectable in attribute_injections:
|
||||
setattr(provided, name, injectable)
|
||||
if not self.attribute_injections:
|
||||
for injection in self.attribute_injections:
|
||||
setattr(instance, injection.name, injection.value)
|
||||
|
||||
method_injections = prepare_injections(self.method_injections)
|
||||
for name, injectable in method_injections:
|
||||
getattr(provided, name)(injectable)
|
||||
if not self.method_injections:
|
||||
for injection in self.method_injections:
|
||||
getattr(instance, injection.name)(injection.value)
|
||||
|
||||
return provided
|
||||
return instance
|
||||
|
||||
|
||||
class Singleton(NewInstance):
|
||||
"""
|
||||
|
||||
"""Singleton provider.
|
||||
|
||||
Singleton provider will create instance once and return it on every call.
|
||||
"""
|
||||
|
||||
def __init__(self, *args, **kwargs):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
self.instance = None
|
||||
super(Singleton, self).__init__(*args, **kwargs)
|
||||
|
||||
def __call__(self, *args, **kwargs):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
if not self.instance:
|
||||
self.instance = super(Singleton, self).__call__(*args, **kwargs)
|
||||
return self.instance
|
||||
|
||||
def _reset_instance(self):
|
||||
"""
|
||||
Resets instance.
|
||||
"""
|
||||
"""Reset instance."""
|
||||
self.instance = None
|
||||
|
||||
|
||||
class Scoped(Singleton):
|
||||
"""
|
||||
Scoped provider will create instance once for every scope and return it on every call.
|
||||
|
||||
"""Scoped provider.
|
||||
|
||||
Scoped provider will create instance once for every scope and return it
|
||||
on every call.
|
||||
"""
|
||||
|
||||
def __init__(self, *args, **kwargs):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
self.is_in_scope = None
|
||||
super(Scoped, self).__init__(*args, **kwargs)
|
||||
|
||||
def in_scope(self):
|
||||
"""
|
||||
Sets provider in "in scope" state.
|
||||
"""
|
||||
"""Set provider in "in scope" state."""
|
||||
self.is_in_scope = True
|
||||
self._reset_instance()
|
||||
|
||||
def out_of_scope(self):
|
||||
"""
|
||||
Sets provider in "out of scope" state.
|
||||
"""
|
||||
"""Set provider in "out of scope" state."""
|
||||
self.is_in_scope = False
|
||||
self._reset_instance()
|
||||
|
||||
def __call__(self, *args, **kwargs):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
if not self.is_in_scope:
|
||||
raise RuntimeError('Trying to provide {} while provider is not in scope'.format(self.provides))
|
||||
raise RuntimeError('Trying to provide {} '.format(self.provides) +
|
||||
'while provider is not in scope')
|
||||
return super(Scoped, self).__call__(*args, **kwargs)
|
||||
|
||||
def __enter__(self):
|
||||
"""
|
||||
With __enter__() implementation. Makes provider to be in scope.
|
||||
"""
|
||||
"""Make provider to be in scope."""
|
||||
self.in_scope()
|
||||
return self
|
||||
|
||||
def __exit__(self, *_):
|
||||
"""
|
||||
With __exit__() implementation. Makes provider to be out of scope.
|
||||
"""
|
||||
"""Make provider to be out of scope."""
|
||||
self.out_of_scope()
|
||||
|
||||
|
||||
class ExternalDependency(Provider):
|
||||
"""
|
||||
External dependency provider.
|
||||
"""
|
||||
|
||||
"""External dependency provider."""
|
||||
|
||||
def __init__(self, instance_of):
|
||||
"""
|
||||
Initializer
|
||||
|
||||
:param instance_of: type
|
||||
"""
|
||||
"""Initializer."""
|
||||
if not isinstance(instance_of, Iterable):
|
||||
instance_of = (instance_of,)
|
||||
self.instance_of = instance_of
|
||||
|
|
@ -213,163 +163,150 @@ class ExternalDependency(Provider):
|
|||
super(ExternalDependency, self).__init__()
|
||||
|
||||
def satisfy(self, provider):
|
||||
"""
|
||||
Satisfies an external dependency.
|
||||
|
||||
:param provider: Provider
|
||||
"""
|
||||
"""Satisfy an external dependency."""
|
||||
self.dependency = provider
|
||||
|
||||
def __call__(self, *args, **kwargs):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
if not self.dependency:
|
||||
raise ValueError('Dependency is not satisfied')
|
||||
|
||||
result = self.dependency.__call__(*args, **kwargs)
|
||||
|
||||
if not any((isinstance(result, possible_type) for possible_type in self.instance_of)):
|
||||
raise TypeError('{} is not an instance of {}'.format(result, self.instance_of))
|
||||
is_instance = any((isinstance(result, possible_type)
|
||||
for possible_type in self.instance_of))
|
||||
|
||||
if not is_instance:
|
||||
raise TypeError('{} is not an '.format(result) +
|
||||
'instance of {}'.format(self.instance_of))
|
||||
|
||||
return result
|
||||
|
||||
|
||||
class _StaticProvider(Provider):
|
||||
"""
|
||||
|
||||
"""Static provider.
|
||||
|
||||
Static provider is base implementation that provides exactly the same as
|
||||
it got on input.
|
||||
"""
|
||||
|
||||
def __init__(self, provides):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
self.provides = provides
|
||||
super(_StaticProvider, self).__init__()
|
||||
|
||||
def __call__(self):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
if self.__overridden_by__:
|
||||
return self.__overridden_by__[-1].__call__()
|
||||
return self.provides
|
||||
|
||||
|
||||
class Class(_StaticProvider):
|
||||
"""
|
||||
Class provider provides class.
|
||||
"""
|
||||
|
||||
"""Class provider provides class."""
|
||||
|
||||
|
||||
class Object(_StaticProvider):
|
||||
"""
|
||||
Object provider provides object.
|
||||
"""
|
||||
|
||||
"""Object provider provides object."""
|
||||
|
||||
|
||||
class Function(_StaticProvider):
|
||||
"""
|
||||
Function provider provides function.
|
||||
"""
|
||||
|
||||
"""Function provider provides function."""
|
||||
|
||||
|
||||
class Value(_StaticProvider):
|
||||
"""
|
||||
Value provider provides value.
|
||||
"""
|
||||
|
||||
"""Value provider provides value."""
|
||||
|
||||
|
||||
class Callable(Provider):
|
||||
"""
|
||||
|
||||
"""Callable provider.
|
||||
|
||||
Callable provider will provide callable calls with some predefined
|
||||
dependencies injections.
|
||||
"""
|
||||
|
||||
def __init__(self, calls, *injections):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
self.calls = calls
|
||||
self.injections = fetch_injections(injections, Injection)
|
||||
self.injections = _fetch_injections(injections, Injection)
|
||||
super(Callable, self).__init__()
|
||||
|
||||
def __call__(self, *args, **kwargs):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
if self.__overridden_by__:
|
||||
return self.__overridden_by__[-1].__call__(*args, **kwargs)
|
||||
|
||||
injections = prepare_injections(self.injections)
|
||||
injections = dict(injections)
|
||||
injections = dict(((injection.name, injection.value)
|
||||
for injection in self.injections))
|
||||
injections.update(kwargs)
|
||||
|
||||
return self.calls(*args, **injections)
|
||||
|
||||
|
||||
class _DeferredConfig(Provider):
|
||||
"""
|
||||
|
||||
"""Deferred config provider.
|
||||
|
||||
Deferred config providers provide an value from the root config object.
|
||||
"""
|
||||
|
||||
def __init__(self, paths, root_config):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
self.paths = paths
|
||||
self.root_config = root_config
|
||||
super(_DeferredConfig, self).__init__()
|
||||
|
||||
def __getattr__(self, item):
|
||||
"""
|
||||
Returns instance of deferred config.
|
||||
"""
|
||||
"""Return instance of deferred config."""
|
||||
return _DeferredConfig(paths=self.paths + (item,),
|
||||
root_config=self.root_config)
|
||||
|
||||
def __call__(self, *args, **kwargs):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
return self.root_config(self.paths)
|
||||
|
||||
|
||||
class Config(Provider):
|
||||
"""
|
||||
|
||||
"""Config provider.
|
||||
|
||||
Config provider provides dict values. Also config provider creates
|
||||
deferred config objects for all undefined attribute calls.
|
||||
"""
|
||||
|
||||
def __init__(self, value=None):
|
||||
"""
|
||||
Initializer.
|
||||
"""
|
||||
"""Initializer."""
|
||||
if not value:
|
||||
value = dict()
|
||||
self.value = value
|
||||
super(Config, self).__init__()
|
||||
|
||||
def update_from(self, value):
|
||||
"""
|
||||
Updates current value from another one.
|
||||
"""
|
||||
"""Update current value from another one."""
|
||||
self.value.update(value)
|
||||
|
||||
def __getattr__(self, item):
|
||||
"""
|
||||
Returns instance of deferred config.
|
||||
"""
|
||||
"""Return instance of deferred config."""
|
||||
return _DeferredConfig(paths=(item,),
|
||||
root_config=self)
|
||||
|
||||
def __call__(self, paths=None):
|
||||
"""
|
||||
Returns provided instance.
|
||||
"""
|
||||
"""Return provided instance."""
|
||||
value = self.value
|
||||
if paths:
|
||||
for path in paths:
|
||||
value = value[path]
|
||||
return value
|
||||
|
||||
|
||||
def _fetch_injections(injections, injection_type):
|
||||
"""Fetch injections of injection type from list."""
|
||||
return tuple([injection
|
||||
for injection in injections
|
||||
if isinstance(injection, injection_type)])
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user