simple, but tests pass

pystache/__init__.py

+import re
+
+class Pystache(object):
+    @staticmethod
+    def render(template, context):
+        return Template(template, context).render()
+
+class Template(object):
+    def __init__(self, template, context={}):
+        self.template = template
+        self.context = context
+
+    def render(self):
+        return self.render_tags()
+
+    def render_tags(self):
+        regexp = re.compile(r"{{(#|=|!|<|>|\{)?(.+?)\1?}}+")
+        template = self.template
+
+        match = re.search(regexp, template)
+        while match:
+            tag, tag_name = match.group(0, 2)
+            if tag_name in self.context:
+                template = template.replace(tag, self.context[tag_name])
+            match = re.search(regexp, template)
+
+        return template
+

tests/test_pystache.py

+import unittest
+from pystache import Pystache
+
+class TestPystache(unittest.TestCase):
+    def test_basic(self):
+        ret = Pystache.render("Hi {{thing}}!", { 'thing': 'world' })
+        self.assertEquals(ret, "Hi world!")
+
+    def test_less_basic(self):
+        template = """It's a nice day for {{beverage}}, right {{person}}?"""
+        ret = Pystache.render(template, { 'beverage': 'soda', 'person': 'Bob' })
+        self.assertEquals(ret, "It's a nice day for soda, right Bob?")
+
+