Core: created an interactive version of 'get_parameter'

easycloud/core/metaconfmanager.py

@@ -78,20 +78,20 @@ class MetaConfManager(ABC):
     def get_parameter(self, section, option, return_type=None, regex=None, default=None):
         """
         Return the parameter stored in the module configuration file or
-        ask the user to provide it
+        the given default value.
 
         Args:
-            section (str): name of the section (a name surrounded with square brackets
-                           inside the configuration file)
-            option (str): name of the parameter
-            return_type (<return_type>, optional): the return type assigned to user input,
-                                                   if not specified in the configuration
-                                                   file
+            section (str): name of the section (a name surrounded with square
+                brackets inside the configuration file).
+            option (str): name of the parameter.
+            return_type (<return_type>): the type to which convert the parameter
+                value read from the configuration file and returned from this
+                function.
             regex (str): the regular expression the input must follow, if a user input is
-                         required
+                required.
 
         Returns:
-            <return_type>: user input of type <return_type>
+            <return_type>: the parameter value converted to the given return type.
         """
         if self.parser.has_option(section, option):
             value = self.parser.get(section, option)
@@ -100,9 +100,32 @@ class MetaConfManager(ABC):
                     return True
             else:
                 return return_type(value)
-        elif default is not None:
-            return default
         else:
+            return default
+
+    def get_parameter_ui(self, section, option, return_type=None, regex=None, default=None):
+        """
+        Return the parameter stored in the module configuration file or
+        ask the user to provide it if no default value is given.
+
+        Args:
+            section (str): name of the section (a name surrounded with square brackets
+                inside the configuration file).
+            option (str): name of the parameter.
+            return_type (<return_type>, optional): the return type assigned to
+                user input, if not specified in the configuration file.
+            regex (str): the regular expression the input must follow, if a user
+                input is required.
+
+        Returns:
+            <return_type>: user input of type <return_type>.
+        """
+        value = self.get_parameter(section,
+                                   option,
+                                   return_type=return_type,
+                                   regex=regex,
+                                   default=default)
+        if value is None:
             return self.ask_for_data(section, option, regex=regex, return_type=return_type)
 
     def get_parameters(self, section):