Using swagger-codegen to create templates for new classes - swagger

Question

I'm trying to use swagger to create a templates for classes so that when someone wants to write a new class into my project, he will just need to write a json file and activate the swagger codegen.
I created a sample mustache file and a json, and the template is created and written by swagger, BUT, instead of inserting the parameter I want it leaves a blank space.
The example below will probably explain better.... (I am trying to create a template for python right now):
The mustache file:
class {{classname}}:
def __init__(self, value):
self._value = value
def print_line(self):
if self._value > 10:
print "val bigger than 10"
else:
print "zero"
The json file:
{
"swagger": "2.0",
"info": {
"version": "1.0.0",
"description": "Trying to create a template class"
},
"paths": {},
"classname": "Template_Class_Example"
}
The Result:
class :
def __init__(self, value):
self._value = value
def print_line(self):
if self._value > 10:
print "val bigger than 10"
else:
print "zero"
As you can see, 'classname' wasn't replaced, but left blank.
Am I missing something?
Is it even possible to do what I want using swagger-codegen?
Thank you in advance,
Jacob