First iteration of parser tree docs.

docs/docs/parser_tree.rst

@@ -0,0 +1,36 @@
+.. _parser-tree:
+
+Parser Tree
+===========
+
+Usage
+-----
+
+.. automodule:: parso.python
+    :members:
+    :undoc-members:
+
+
+Parser Tree Base Class
+----------------------
+
+All nodes and leaves have these methods/properties:
+
+.. autoclass:: parso.tree.NodeOrLeaf
+    :members:
+    :undoc-members:
+
+
+Python Parser Tree
+------------------
+
+.. automodule:: parso.python.tree
+    :members:
+    :undoc-members:
+    :show-inheritance:
+
+
+Utility
+-------
+
+.. autofunction:: parso.tree.search_ancestor

docs/docs/usage.rst

@@ -9,6 +9,14 @@ can also be created by directly instantiating ``Grammar``. More information
 about the resulting objects can be found in the :ref:`parser tree documentation
 <plugin-api-classes>`.
 
+The simplest way of using parso is without even loading a grammar:
+
+.. sourcecode:: python
+
+   >>> import parso
+   >>> parso.parse('foo + bar')
+   <Module: @1-1>
+
 .. automodule:: parso.grammar
     :members:
     :undoc-members: