parameters: (page,image=False)
return_statement: return False
docstring: checks if given page/image already exists
docstring_summary: checks if given page/image already exists
docstring_tokens: checks if given page / image already exists
function: def exists(page,image=False):
      "checks if given page/image already exists"
      path = local(page.replace("/","-"),image)
      if os.path.exists(path): return True
      return False
function_tokens: def exists ( page , image = False ) : path = local ( page . replace ( "/" , "-" ) , image ) if os . path . exists ( path ) : return True return False