config: allow types other than string in get_option()/set_option()

There is no reason to limit options to strings. YAML supports scalars,
lists and dictionaries. As there is no way to write the options set
during runtime back to YAML, so there is no reason to limit the types for
the set_option() method either.

Lift this limitation, so YAML-supported data types can be retrieved and
all data types can be set.

Note that this changes previous behavior, because now options are not
converted to strings anymore.

Signed-off-by: Bastian Krause <bst@pengutronix.de>

Author: Bastian-Krause

labgrid/config.py

@@ -142,18 +142,18 @@ def get_option(self, name, default=None):
 
         Args:
             name (str): name of the option
-            default (str): A default parameter in case the option can not be
+            default (any): A default parameter in case the option can not be
                 found
 
         Returns:
-            str: value of the option or default parameter
+            any: value of the option or default parameter
 
         Raises:
             KeyError: if the requested image can not be found in the
                 configuration
         """
         try:
-            return str(self.data['options'][name])
+            return self.data['options'][name]
         except KeyError:
             if default is None:
                 raise KeyError(f"no option '{name}' found in configuration")
@@ -165,9 +165,8 @@ def set_option(self, name, value):
 
         Args:
             name (str): name of the option
-            value (str): the new value
+            value (any): the new value
         """
-        assert isinstance(value, str)
         self.data.setdefault('options', {})[name] = value
 
     def get_target_option(self, target, name, default=None):