fix: circular import problem

Author: MaferMazu

openedx_authz/api/__init__.py

@@ -5,7 +5,35 @@
 provide a simpler interface for other services in the Open edX ecosystem.
 """
 
+# Import data module directly as it has no circular dependencies
 from openedx_authz.api.data import *
-from openedx_authz.api.permissions import *
-from openedx_authz.api.roles import *
-from openedx_authz.api.users import *
+
+# Lazy import other modules to avoid circular import issues
+# The permissions module imports from engine.enforcer, which creates a circular dependency
+# if imported at module level. Using __getattr__ allows us to defer the import until needed.
+
+
+def __getattr__(name):
+    """Lazy import attributes from sub-modules to avoid circular imports.
+    
+    This function is called when an attribute is not found in the module.
+    It allows us to import from sub-modules only when needed, breaking
+    the circular dependency chain.
+    """
+    # Try importing from each sub-module
+    submodules = ['permissions', 'roles', 'users']
+
+    for submodule_name in submodules:
+        try:
+            submodule = __import__(
+                f'openedx_authz.api.{submodule_name}',
+                fromlist=[name]
+            )
+            if hasattr(submodule, name):
+                # Cache the attribute in this module for future access
+                globals()[name] = getattr(submodule, name)
+                return globals()[name]
+        except (ImportError, AttributeError):
+            continue
+
+    raise AttributeError(f"module '{__name__}' has no attribute '{name}'")