Moved add_prompts into correct location.

IPython/nbconvert/exporters/exporter.py

@@ -182,33 +182,33 b' class Exporter(LoggingConfigurable):'
         isclass = isinstance(preprocessor, type)
         constructed = not isclass
 
-        #Handle preprocessor's registration based on it's type
+        # Handle preprocessor's registration based on it's type
         if constructed and isinstance(preprocessor, py3compat.string_types):
-            #preprocessor is a string, import the namespace and recursively call
-            #this register_preprocessor method
+            # Preprocessor is a string, import the namespace and recursively call
+            # this register_preprocessor method
             preprocessor_cls = import_item(preprocessor)
             return self.register_preprocessor(preprocessor_cls, enabled)
 
         if constructed and hasattr(preprocessor, '__call__'):
-            #preprocessor is a function, no need to construct it.
-            #Register and return the preprocessor.
+            # Preprocessor is a function, no need to construct it.
+            # Register and return the preprocessor.
             if enabled:
                 preprocessor.enabled = True
             self._preprocessors.append(preprocessor)
             return preprocessor
 
         elif isclass and isinstance(preprocessor, MetaHasTraits):
-            #preprocessor is configurable.  Make sure to pass in new default for
-            #the enabled flag if one was specified.
+            # Preprocessor is configurable.  Make sure to pass in new default for 
+            # the enabled flag if one was specified.
             self.register_preprocessor(preprocessor(parent=self), enabled)
 
         elif isclass:
-            #preprocessor is not configurable, construct it
+            # Preprocessor is not configurable, construct it
             self.register_preprocessor(preprocessor(), enabled)
 
         else:
-            #preprocessor is an instance of something without a __call__
-            #attribute.
+            # Preprocessor is an instance of something without a __call__ 
+            # attribute.  
             raise TypeError('preprocessor')
 
 

IPython/nbconvert/filters/strings.py

@@ -40,6 +40,7 b' __all__ = ['
     'ipython2python',
     'posix_path',
     'path2url',
+    'add_prompts'
 ]
 
 
@@ -95,6 +96,16 b' def add_anchor(html):'
     return py3compat.decode(ElementTree.tostring(h), 'utf-8')
 
 
+def add_prompts(code, first='>>> ', cont='... '):
+    """Add prompts to code snippets"""
+    new_code = []
+    code_list = code.split('\n')
+    new_code.append(first + code_list[0])
+    for line in code_list[1:]:
+        new_code.append(cont + line)
+    return '\n'.join(new_code)
+
+    
 def strip_dollars(text):
     """
     Remove all dollar symbols from text