[Python API] Fix documentation for Core API (#11187)

* [Python API] Fix documentation for Core API

* fix style

src/bindings/python/src/openvino/runtime/ie_api.py

@@ -256,7 +256,27 @@ class Core(CoreBase):
     def compile_model(
         self, model: Union[Model, str], device_name: str = None, config: dict = None
     ) -> CompiledModel:
-        """Compile a model from given Model."""
+        """Creates a compiled model.
+
+        Creates a compiled model from a source Model object or
+        reads model and creates a compiled model from IR / ONNX / PDPD file.
+        This can be more efficient than using read_model + compile_model(model_in_memory_object) flow,
+        especially for cases when caching is enabled and cached model is available.
+        If device_name is not specified, the default OpenVINO device will be selected by AUTO plugin.
+        Users can create as many compiled models as they need, and use them simultaneously
+        (up to the limitation of the hardware resources).
+
+        :param model: Model acquired from read_model function or a path to a model in IR / ONNX / PDPD format.
+        :type model: Union[openvino.runtime.Model, str]
+        :param device_name: Optional. Name of the device to load the model to. If not specified,
+                            the default OpenVINO device will be selected by AUTO plugin.
+        :type device_name: str
+        :param config: Optional dict of pairs:
+                       (property name, property value) relevant only for this load operation.
+        :type config: dict
+        :return: A compiled model.
+        :rtype: openvino.runtime.CompiledModel
+        """
         if device_name is None:
             return CompiledModel(
                 super().compile_model(model, {} if config is None else config)
@@ -267,9 +287,46 @@ class Core(CoreBase):
         )
 
     def import_model(
-        self, model_stream: str, device_name: str, config: dict = None
+        self, model_stream: bytes, device_name: str, config: dict = None
     ) -> CompiledModel:
-        """Compile a model from given model file path."""
+        """Imports a compiled model from a previously exported one.
+
+        :param model_stream: Input stream, containing a model previously exported, using export_model method.
+        :type model_stream: bytes
+        :param device_name: Name of device to which compiled model is imported.
+                            Note: if device_name is not used to compile the original model,
+                            an exception is thrown.
+        :type device_name: str
+        :param properties: Optional map of pairs: (property name,
+                           property value) relevant only for this load operation.
+        :type properties: dict, optional
+        :return: A compiled model.
+        :rtype: openvino.runtime.CompiledModel
+
+        :Example:
+        .. code-block:: python
+
+            user_stream = compiled.export_model()
+
+            with open('./my_model', 'wb') as f:
+                f.write(user_stream)
+
+            # ...
+
+            new_compiled = core.import_model(user_stream, "CPU")
+
+        .. code-block:: python
+
+            user_stream = io.BytesIO()
+            compiled.export_model(user_stream)
+
+            with open('./my_model', 'wb') as f:
+                f.write(user_stream.getvalue()) # or read() if seek(0) was applied before
+
+            # ...
+
+            new_compiled = core.import_model(user_stream, "CPU")
+        """
         return CompiledModel(
             super().import_model(
                 model_stream, device_name, {} if config is None else config