capybara/virtualenv/lib/python2.7/site-packages/flask/app.py
def try_trigger_before_first_request_functions(self):
        """Called before each request and will ensure that it triggers
        the :attr:`before_first_request_funcs` and only exactly once per
        application instance (which means process usually).

        :internal:
        """
        if self._got_first_request:
            return
        with self._before_request_lock:
            if self._got_first_request:
                return
            self._got_first_request = True
            for func in self.before_first_request_funcs:
                func()
def try_trigger_before_first_request_functions(self):
        """Called before each request and will ensure that it triggers
        the :attr:`before_first_request_funcs` and only exactly once per
        application instance (which means process usually).

        :internal:
        """
        if self._got_first_request:
            return
        with self._before_request_lock:
            if self._got_first_request:
                return
            self._got_first_request = True
            for func in self.before_first_request_funcs:
                func()
Called before each request and will ensure that it triggers
        the :attr:`before_first_request_funcs` and only exactly once per
        application instance (which means process usually).

        :internal: