# gevent

# `gevent.time` – Makes sleep gevent aware

This module has all the members of `time`, but the sleep function is `gevent.sleep()`.

The standard library `time` module, but `sleep()` is gevent-aware.

New in version 1.3a2.

sleep(seconds=0, ref=True)

  Put the current greenlet to sleep for at least seconds.

  seconds may be specified as an integer, or a float if fractional seconds are desired.

  Tip

  In the current implementation, a value of 0 (the default) means to yield execution to any other runnable greenlets, but this greenlet may be scheduled again before the event loop cycles (in an extreme case, a greenlet that repeatedly sleeps with 0 can prevent greenlets that are ready to do I/O from being scheduled for some (small) period of time); a value greater than 0, on the other hand, will delay running this greenlet until the next iteration of the loop.

  If ref is False, the greenlet running `sleep()` will not prevent `gevent.wait()` from exiting.

  Changed in version 1.3a1: Sleeping with a value of 0 will now be bounded to approximately block the loop for no longer than `gevent.getswitchinterval()`.

  See also

  `idle()`

Next page: `gevent.util` – Low-level utilities