fixed readme and selectors tutorial

README.md

@@ -106,16 +106,16 @@ Let's pretty-print it! We can use a transformer to do it. A transformer is a tre
 
     >>> class PrettyINI(plyplus.STransformer):
         def option(self, tree):
-            name = tree.select('name *')[0]
-            value = tree.select('value *')[0]
+            name = tree.select1('name *')   # select1 asserts only one result
+            value = tree.select1('value *')
             return '%s = %s' % (name, value)
         def section(self, tree):
-            name = tree.select('name *')[0]
+            name = tree.select1('name *')
             return '[%s]\n\t%s' % (name, '\n\t'.join(tree.tail[1:]))
 
 Now that each rule has code to handle it, let's run it!
 
-    >>> meta = t.select('=section /meta/')[0]
+    >>> meta = t.select1('=section /meta/')
     >>> print PrettyINI().transform( meta )
     [meta]
             Name = npymath
@@ -124,7 +124,7 @@ Now that each rule has code to handle it, let's run it!
 
 It works! Now that it's done, we can use it to output the rest of the file as well:
 
-    >>> print '\n'.join( PrettyINI().transform(t) )
+    >>> print '\n'.join( PrettyINI().transform(t).tail )
     ... (left as an excercise to the reader ;)
 
 

docs/selectors.md

@@ -67,7 +67,7 @@ Wait! Why did we get "basestring" twice? And why is "isinstance" there? It's not
 
 How about all of the keyword arguments used? (notice they are pairs of names inside an "arg" head)
 
-    >>> arg =name + *
+    >>> x.select('arg =name + *')
     [name('isinstance'), name('shell'), name('bufsize'), name('stdin'), name('stdout'), name('close_fds')]
 
 ## Afterword