parameters: (self)
return_statement: return self.lastch == ':'
docstring: Return True if the last interesting statement opens a block.
docstring_summary: Return True if the last interesting statement opens a block.
docstring_tokens: Return True if the last interesting statement opens a block .
function: def is_block_opener(self):
          "Return True if the last interesting statement opens a block."
          self._study2()
          return self.lastch == ':'
function_tokens: def is_block_opener ( self ) : self . _study2 ( ) return self . lastch == ':'