old_contents: __author__ = 'Chris Krycho'
  __copyright__ = '2013 Chris Krycho'
  
  from logging import error
  from os import path, walk
  from sys import exit
  
  try:
      from markdown import Markdown
      from mixins import DictAsMember
  
  except ImportError as import_error:
      error(import_error)
      exit()
  
  
  def convert_source(config):
      '''
      Convert all Markdown pages to HTML and metadata pairs. Pairs are keyed to
      file names slugs (without the original file extension).
      '''
  
      md = Markdown(extensions=config.markdown_extensions, output_format='html5')
      converted = {}
      for root, dirs, file_names in walk(config.site.content.source):
          for file_name in file_names:
              file_path = path.join(root, file_name)
              plain_slug, extension = path.splitext(file_name)
  
              with open(file_path) as file:
                  md_text = file.read()
                  content = md.convert(md_text)
                  converted[plain_slug] = {'content': content, 'meta': md.Meta}
  
      return DictAsMember(converted)
  
new_contents: __author__ = 'Chris Krycho'
  __copyright__ = '2013 Chris Krycho'
  
  from logging import error
  from os import path, walk
  from sys import exit
  
  try:
      from markdown import Markdown
      from mixins import DictAsMember
  
  except ImportError as import_error:
      error(import_error)
      exit()
  
  
  def convert_source(config):
      '''
      Convert all Markdown pages to HTML and metadata pairs. Pairs are keyed to
      file names slugs (without the original file extension).
      '''
  
      md = Markdown(extensions=config.markdown_extensions, output_format='html5')
      converted = {}
      for root, dirs, file_names in walk(config.site.content.source):
          for file_name in file_names:
              file_path = path.join(root, file_name)
              plain_slug, extension = path.splitext(file_name)
  
              with open(file_path) as file:
                  md_text = file.read()
                  content = md.convert(md_text)
                  converted[plain_slug] = {'content': content, 'meta': md.Meta}
                  md.reset()
  
      return DictAsMember(converted)
  
subject: Call the reset() method in the Markdown object to clear extensions (e.g. metadata) between processing each file.