Made the modifiers registry a class attribute rather than a global.

pystache/template.py

@@ -4,40 +4,49 @@ import collections
 import os
 import copy
 
-modifiers = {}
-def modifier(symbol):
-    """Decorator for associating a function with a Mustache tag modifier.
 
-    @modifier('P')
-    def render_tongue(self, tag_name=None, context=None):
-        return ":P %s" % tag_name
+class Modifiers(dict):
+    """Dictionary with a decorator for assigning functions to keys."""
+
+    def set(self, key):
+        """
+        Decorator function to set the given key to the decorated function.
+
+            >>> modifiers = {}
+            >>> @modifiers.set('P')
+            ... def render_tongue(self, tag_name=None, context=None):
+            ...     return ":P %s" % tag_name
+            >>> modifiers
+            {'P': <function render_tongue at 0x...>}
+        """
+
+        def setter(func):
+            self[key] = func
+            return func
+        return setter
 
-    {{P yo }} => :P yo
-    """
-    def set_modifier(func):
-        modifiers[symbol] = func
-        return func
-    return set_modifier
 
 class Template(object):
-    
+
     tag_re = None
-    
+
     otag = '{{'
-    
+
     ctag = '}}'
-    
+
+    modifiers = Modifiers()
+
     def __init__(self, template=None, context=None, **kwargs):
         from view import View
-        
+
         self.template = template
-        
+
         if kwargs:
             context.update(kwargs)
-            
+
         self.view = context if isinstance(context, View) else View(context=context)
         self._compile_regexps()
-    
+
     def _compile_regexps(self):
         tags = {
             'otag': re.escape(self.otag),
@@ -49,7 +58,7 @@ class Template(object):
 
         tag = r"%(otag)s(#|=|&|!|>|\{)?(.+?)\1?%(ctag)s+"
         self.tag_re = re.compile(tag % tags)
-    
+
     def _render_sections(self, template, view):
         while True:
             match = self.section_re.search(template)
@@ -79,23 +88,23 @@ class Template(object):
             # Falsey and Negated or Truthy and Not Negated
             elif (not it and section[2] == '^') or (it and section[2] != '^'):
                 replacer = inner
-            
+
             template = template.replace(section, replacer)
-        
+
         return template
-    
+
     def _render_tags(self, template):
         while True:
             match = self.tag_re.search(template)
             if match is None:
                 break
-                
+
             tag, tag_type, tag_name = match.group(0, 1, 2)
             tag_name = tag_name.strip()
-            func = modifiers[tag_type]
+            func = self.modifiers[tag_type]
             replacement = func(self, tag_name)
             template = template.replace(tag, replacement)
-        
+
         return template
 
     def _render_dictionary(self, template, context):
@@ -104,53 +113,53 @@ class Template(object):
         out = template.render()
         self.view.context_list.pop(0)
         return out
-    
+
     def _render_list(self, template, listing):
         insides = []
         for item in listing:
             insides.append(self._render_dictionary(template, item))
-            
+
         return ''.join(insides)
-    
-    @modifier(None)
+
+    @modifiers.set(None)
     def _render_tag(self, tag_name):
         raw = self.view.get(tag_name, '')
-        
+
         # For methods with no return value
         if not raw and raw is not 0:
             return ''
-        
+
         return cgi.escape(unicode(raw))
-    
-    @modifier('!')
+
+    @modifiers.set('!')
     def _render_comment(self, tag_name):
         return ''
-    
-    @modifier('>')
+
+    @modifiers.set('>')
     def _render_partial(self, template_name):
         from pystache import Loader
         markup = Loader().load_template(template_name, self.view.template_path, encoding=self.view.template_encoding)
         template = Template(markup, self.view)
         return template.render()
 
-    @modifier('=')
+    @modifiers.set('=')
     def _change_delimiter(self, tag_name):
         """Changes the Mustache delimiter."""
         self.otag, self.ctag = tag_name.split(' ')
         self._compile_regexps()
         return ''
-    
-    @modifier('{')
-    @modifier('&')
+
+    @modifiers.set('{')
+    @modifiers.set('&')
     def render_unescaped(self, tag_name):
         """Render a tag without escaping it."""
         return unicode(self.view.get(tag_name, ''))
-    
+
     def render(self, encoding=None):
         template = self._render_sections(self.template, self.view)
         result = self._render_tags(template)
-        
+
         if encoding is not None:
             result = result.encode(encoding)
-        
-        return result
\ No newline at end of file
+
+        return result