Remove restriction to wire a dynamic container

src/dependency_injector/wiring.py

@@ -322,9 +322,6 @@ def wire(  # noqa: C901
         packages: Optional[Iterable[ModuleType]] = None,
 ) -> None:
     """Wire container providers with provided packages and modules."""
-    if not _is_declarative_container_instance(container):
-        raise Exception('Can wire only an instance of the declarative container')
-
     if not modules:
         modules = []
 
@@ -655,12 +652,6 @@ def _is_patched(fn):
     return getattr(fn, '__wired__', False) is True
 
 
-def _is_declarative_container_instance(instance: Any) -> bool:
-    return (not isinstance(instance, type)
-            and getattr(instance, '__IS_CONTAINER__', False) is True
-            and getattr(instance, 'declarative_parent', None) is not None)
-
-
 def _is_declarative_container(instance: Any) -> bool:
     return (isinstance(instance, type)
             and getattr(instance, '__IS_CONTAINER__', False) is True

tests/unit/wiring/test_wiring_string_ids_py36.py

@@ -7,7 +7,7 @@ from dependency_injector.wiring import (
     Provider,
     Closing,
 )
-from dependency_injector import errors
+from dependency_injector import containers, providers, errors
 
 # Runtime import to avoid syntax errors in samples on Python < 3.5
 import os
@@ -335,6 +335,27 @@ class WiringAndFastAPITest(unittest.TestCase):
         self.assertIsNot(result_1, result_2)
 
 
+class WireDynamicContainerTest(unittest.TestCase):
+
+    def test_wire(self):
+        sub = containers.DynamicContainer()
+        sub.int_object = providers.Object(1)
+
+        container = containers.DynamicContainer()
+        container.config = providers.Configuration()
+        container.service = providers.Factory(Service)
+        container.sub = sub
+
+        container.wire(
+            modules=[module],
+            packages=[package],
+        )
+        self.addCleanup(container.unwire)
+
+        service = module.test_function()
+        self.assertIsInstance(service, Service)
+
+
 class WiringAsyncInjectionsTest(AsyncTestCase):
 
     def test_async_injections(self):