Add backwards compatible getfullargspec and TokenType.

django_components/component.py

@@ -1,14 +1,28 @@
-from inspect import getfullargspec
-
 from django.forms.widgets import MediaDefiningClass
 from django.template import Context
-from django.template.base import NodeList, TokenType, TextNode
+from django.template.base import NodeList, TextNode
 from django.template.loader import get_template
 from six import with_metaclass
 
 # Allow "component.AlreadyRegistered" instead of having to import these everywhere
 from django_components.component_registry import AlreadyRegistered, ComponentRegistry, NotRegistered  # NOQA
 
+# Python 2 compatibility
+try:
+    from inspect import getfullargspec
+except ImportError:
+    from inspect import getargspec as getfullargspec
+
+# Django < 2.1 compatibility
+try:
+    from django.template.base import TokenType
+except ImportError:
+    from django.template.base import TOKEN_TEXT, TOKEN_VAR, TOKEN_BLOCK
+
+    class TokenType:
+        TEXT = TOKEN_TEXT
+        VAR = TOKEN_VAR
+        BLOCK = TOKEN_BLOCK
 
 class Component(with_metaclass(MediaDefiningClass)):
     def context(self):