Use a special value for not set attributes and parameters

codegen/templates/GithubObject.Implementation.py

@@ -6,27 +6,27 @@
 
     def _initAttributes( self ):
 {% for attribute in class.attributes|dictsort:"name" %}
-        self._{{ attribute.name }} = None
+        self._{{ attribute.name }} = GithubObject.NotSet
 {% endfor %}
 
     def _useAttributes( self, attributes ):
 {% for attribute in class.attributes|dictsort:"name" %}
-        if "{{ attribute.name }}" in attributes and attributes[ "{{ attribute.name }}" ] is not None: # pragma no branch
+        if "{{ attribute.name }}" in attributes: # pragma no branch
 
 {% if attribute.type.cardinality == "scalar" %}
 
     {% if attribute.type.simple %}
         {% if attribute.type.name == "string" %}
-            assert isinstance( attributes[ "{{ attribute.name }}" ], ( str, unicode ) ), attributes[ "{{ attribute.name }}" ]
+            assert attributes[ "{{ attribute.name }}" ] is None or isinstance( attributes[ "{{ attribute.name }}" ], ( str, unicode ) ), attributes[ "{{ attribute.name }}" ]
         {% endif %}
         {% if attribute.type.name == "integer" %}
-            assert isinstance( attributes[ "{{ attribute.name }}" ], int ), attributes[ "{{ attribute.name }}" ]
+            assert attributes[ "{{ attribute.name }}" ] is None or isinstance( attributes[ "{{ attribute.name }}" ], int ), attributes[ "{{ attribute.name }}" ]
         {% endif %}
         {% if attribute.type.name == "bool" %}
-            assert isinstance( attributes[ "{{ attribute.name }}" ], bool ), attributes[ "{{ attribute.name }}" ]
+            assert attributes[ "{{ attribute.name }}" ] is None or isinstance( attributes[ "{{ attribute.name }}" ], bool ), attributes[ "{{ attribute.name }}" ]
         {% endif %}
     {% else %}
-            assert isinstance( attributes[ "{{ attribute.name }}" ], dict ), attributes[ "{{ attribute.name }}" ]
+            assert attributes[ "{{ attribute.name }}" ] is None or isinstance( attributes[ "{{ attribute.name }}" ], dict ), attributes[ "{{ attribute.name }}" ]
     {% endif %}
 
 {% else %}
@@ -52,7 +52,7 @@
     {% if attribute.type.simple %}
             self._{{ attribute.name }} = attributes[ "{{ attribute.name }}" ]
     {% else %}
-            self._{{ attribute.name }} = {% if attribute.type.name != class.name %}{{ attribute.type.name }}.{% endif %}{{ attribute.type.name }}( self._requester, attributes[ "{{ attribute.name }}" ], completed = False )
+            self._{{ attribute.name }} = None if attributes[ "{{ attribute.name }}" ] is None else {% if attribute.type.name != class.name %}{{ attribute.type.name }}.{% endif %}{{ attribute.type.name }}( self._requester, attributes[ "{{ attribute.name }}" ], completed = False )
     {% endif %}
 
 {% else %}

codegen/templates/GithubObject.MethodBody.CheckArguments.py

@@ -35,7 +35,7 @@
 {% endfor %}
 {% for parameter in method.optionalParameters %}
     {% if parameter.type.name != "@todo" %}
-        if {{ parameter.name }} is not DefaultValueForOptionalParameters:
+        if {{ parameter.name }} is not GithubObject.NotSet:
     {% endif %}
 
     {% if parameter.type.cardinality == "scalar" %}

codegen/templates/GithubObject.MethodBody.DoRequest.py

@@ -16,7 +16,7 @@
         post_parameters = dict()
         {% endif %}
         {% for parameter in method.optionalParameters %}
-        if {{ parameter.name }} is not DefaultValueForOptionalParameters:
+        if {{ parameter.name }} is not GithubObject.NotSet:
             post_parameters[ "{{ parameter.name }}" ] = {{ parameter.name }}
         {% endfor %}
     {% endif %}
@@ -24,7 +24,7 @@
     {% if method.optionalParameters %}
         url_parameters = dict()
         {% for parameter in method.optionalParameters %}
-        if {{ parameter.name }} is not DefaultValueForOptionalParameters:
+        if {{ parameter.name }} is not GithubObject.NotSet:
             url_parameters[ "{{ parameter.name }}" ] = {{ parameter.name }}
         {% endfor %}
     {% endif %}

codegen/templates/GithubObject.Parameters.py

@@ -1 +1 @@
-self{% for parameter in function.mandatoryParameters %}, {{ parameter.name }}{% endfor %}{% for parameter in function.optionalParameters %}, {{ parameter.name }} = DefaultValueForOptionalParameters{% endfor %}{% if function.variadicParameter %}, *{{ function.variadicParameter.name }}s{% endif %}
+self{% for parameter in function.mandatoryParameters %}, {{ parameter.name }}{% endfor %}{% for parameter in function.optionalParameters %}, {{ parameter.name }} = GithubObject.NotSet{% endfor %}{% if function.variadicParameter %}, *{{ function.variadicParameter.name }}s{% endif %}

codegen/templates/GithubObject.PublicAttributes.py

@@ -2,7 +2,7 @@
     @property
     def {{ attribute.name }}( self ):
 {% if class.isCompletable %}
-        self._completeIfNeeded( self._{{ attribute.name }} )
+        self._completeIfNotSet( self._{{ attribute.name }} )
 {% endif %}
-        return self._{{ attribute.name }}
+        return self._NoneIfNotSet( self._{{ attribute.name }} )
 {% endfor %}

codegen/templates/GithubObject.py

@@ -7,9 +7,6 @@ import GithubObject
 {% if class.needsPaginatedList %}
 import PaginatedList
 {% endif %}
-{% if class.needsDefaultValue %}
-from DefaultValueForOptionalParameters import DefaultValueForOptionalParameters
-{% endif %}
 
 {% if class.dependencies %}
 ##########