Enhance config documentation with examples (#950)

* Update config documentation

* Add example for set_config_option call

* Update src/ansys/dpf/core/dpf_operator.py

Co-authored-by: JennaPaikowsky <98607744+JennaPaikowsky@users.noreply.github.com>

* update doc string

* Update

* up

---------

Co-authored-by: JennaPaikowsky <98607744+JennaPaikowsky@users.noreply.github.com>

src/ansys/dpf/core/config.py

@@ -34,6 +34,25 @@ class Config:
         Server with the channel connected to the remote or local instance. The default is
         ``None``, in which case an attempt is made to use the global server.
 
+    Examples
+    --------
+    Create an operator configuration, instantiate the operator and
+    run it with the configuration.
+
+    >>> from ansys.dpf import core as dpf
+    >>> config_add = dpf.Config("add")
+    >>> config_add.set_work_by_index_option(True)
+    >>> op = dpf.operators.math.add(config=config_add)
+
+    Modify the copy of an operator's configuration and set it as current config
+    of the operator.
+
+    >>> from ansys.dpf import core as dpf
+    >>> op = dpf.operators.math.add()
+    >>> config_add = op.config
+    >>> config_add.set_work_by_index_option(True)
+    >>> op.config = config_add
+
     """
 
     def __init__(self, operator_name=None, config=None, server=None, spec=None):
@@ -144,6 +163,18 @@ def set_config_option(self, config_name, config_value):
             Value to give to a configuration option.
         config_name : str
             Name of the configuration option.
+
+        Examples
+        --------
+        Modify the copy of an operator's configuration and set it as current config
+        of the operator.
+
+        >>> from ansys.dpf import core as dpf
+        >>> op = dpf.operators.math.add()
+        >>> config_add = op.config
+        >>> config_add.set_config_option(config_name="work_by_index", config_value=True)
+        >>> op.config = config_add
+
         """
         return self.__set_config_option__(config_value, config_name)
 

src/ansys/dpf/core/dpf_operator.py

@@ -474,12 +474,26 @@ def config(self):
         """Copy of the operator's current configuration.
 
         You can modify the copy of the configuration and then use ``operator.config = new_config``
-        or create an operator with the new configuration as a parameter.
+        or instantiate an operator with the new configuration as a parameter.
+
+        For information on an operator's options, see the documentation for that operator.
 
         Returns
         ----------
         :class:`ansys.dpf.core.config.Config`
             Copy of the operator's current configuration.
+
+        Examples
+        --------
+        Modify the copy of an operator's configuration and set it as current config
+        of the operator.
+
+        >>> from ansys.dpf import core as dpf
+        >>> op = dpf.operators.math.add()
+        >>> config_add = op.config
+        >>> config_add.set_work_by_index_option(True)
+        >>> op.config = config_add
+
         """
         config = self._api.operator_get_config(self)
         return Config(config=config, server=self._server, spec=self._spec)