rename call methods to transform and postprocess

- The `call` methods for nbconvert transformers has been renamed to
  `transform`.
- The `call` methods of nbconvert post-processsors have been renamed to
  `postprocess`.

  pinging @Carreau and @jdrefer, who probably knows who'd be affected by
  this change...  maybe @damianavila, @jakevdp

IPython/nbconvert/exporters/tests/cheese.py

@@ -32,7 +32,7 b' class CheeseTransformer(Transformer):'
         super(CheeseTransformer, self).__init__(**kw)
 
 
-    def call(self, nb, resources):
+    def transform(self, nb, resources):
         """
         Sphinx transformation to apply on each notebook.
         

IPython/nbconvert/post_processors/base.py

@@ -23,13 +23,13 b' class PostProcessorBase(NbConvertBase):'
 
     def __call__(self, input):
         """
-        See def call() ...
+        See def postprocess() ...
         """
-        self.call(input)
+        self.postprocess(input)
 
 
-    def call(self, input):
+    def postprocess(self, input):
         """
         Post-process output from a writer.
         """
-        raise NotImplementedError('call')
+        raise NotImplementedError('postprocess')

IPython/nbconvert/post_processors/pdf.py

@@ -37,7 +37,7 b' class PDFPostProcessor(PostProcessorBase):'
         Whether or not to display the output of the compile call.
         """)
 
-    def call(self, input):
+    def postprocess(self, input):
             """
             Consume and write Jinja output a PDF.  
             See files.py for more...

IPython/nbconvert/post_processors/serve.py

@@ -34,7 +34,7 b' class ServePostProcessor(PostProcessorBase):'
                            help="""Set to False to deactivate
                            the opening of the browser""")
 
-    def call(self, input):
+    def postprocess(self, input):
         """
         Simple implementation to serve the build directory.
         """

IPython/nbconvert/transformers/base.py

@@ -33,7 +33,7 b' class Transformer(NbConvertBase):'
     using c.SubClassName.atribute=value
 
     you can overwrite :meth:`transform_cell` to apply a transformation independently on each cell
-    or :meth:`call` if you prefer your own logic. See corresponding docstring for informations.
+    or :meth:`transform` if you prefer your own logic. See corresponding docstring for informations.
 
     Disabled by default and can be enabled via the config by
         'c.YourTransformerName.enabled = True'
@@ -58,12 +58,12 b' class Transformer(NbConvertBase):'
        
     def __call__(self, nb, resources):
         if self.enabled:
-            return self.call(nb,resources)
+            return self.transform(nb,resources)
         else:
             return nb, resources
 
 
-    def call(self, nb, resources):
+    def transform(self, nb, resources):
         """
         Transformation to apply on each notebook.
         

IPython/nbconvert/transformers/csshtmlheader.py

@@ -56,7 +56,7 b' class CSSHTMLHeaderTransformer(Transformer):'
             self._regen_header()
 
 
-    def call(self, nb, resources):
+    def transform(self, nb, resources):
         """Fetch and add CSS to the resource dictionary
 
         Fetch CSS from IPython and Pygments to add at the beginning

IPython/nbconvert/transformers/revealhelp.py

@@ -34,7 +34,7 b' class RevealHelpTransformer(Transformer):'
                          help="""If you want to use the speaker notes 
                          set this to True.""")
 
-    def call(self, nb, resources):
+    def transform(self, nb, resources):
         """
         Called once to 'transform' contents of the notebook.
 

IPython/nbconvert/transformers/sphinx.py

@@ -109,7 +109,7 b' class SphinxTransformer(Transformer):'
     overridetitle = Unicode("", config=True, help="")
 
     
-    def call(self, nb, resources):
+    def transform(self, nb, resources):
         """
         Sphinx transformation to apply on each notebook.
         

docs/source/whatsnew/development.rst

@@ -10,3 +10,7 b' Backwards incompatible changes'
 
 * Python 2.6 and 3.2 are no longer supported: the minimum required
   Python versions are now 2.7 and 3.3.
+* The `call` methods for nbconvert transformers has been renamed to
+  `transform`.
+* The `call` methods of nbconvert post-processsors have been renamed to
+  `postprocess`.