_sync.py 文件源码

def statistics(self):
        """Return an object containing debugging information.

        Currently the following fields are defined:

        * ``borrowed_tokens``: The number of tokens currently borrowed from
          the sack.
        * ``total_tokens``: The total number of tokens in the sack. Usually
          this will be larger than ``borrowed_tokens``, but it's possibly for
          it to be smaller if :attr:`total_tokens` was recently decreased.
        * ``borrowers``: A list of all tasks or other entities that currently
          hold a token.
        * ``tasks_waiting``: The number of tasks blocked on this
          :class:`CapacityLimiter`\'s :meth:`acquire` or
          :meth:`acquire_on_behalf_of` methods.

        """
        return _CapacityLimiterStatistics(
            borrowed_tokens=len(self._borrowers),
            total_tokens=self._total_tokens,
            # Use a list instead of a frozenset just in case we start to allow
            # one borrower to hold multiple tokens in the future
            borrowers=list(self._borrowers),
            tasks_waiting=len(self._lot),
        )