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Issue #20400: Merge Tulip into Python: add the new asyncio.subprocess module

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* Add a new asyncio.subprocess module
* Add new create_subprocess_exec() and create_subprocess_shell() functions
* The new asyncio.subprocess.SubprocessStreamProtocol creates stream readers
  for stdout and stderr and a stream writer for stdin.
* The new asyncio.subprocess.Process class offers an API close to the
  subprocess.Popen class:

  - pid, returncode, stdin, stdout and stderr attributes
  - communicate(), wait(), send_signal(), terminate() and kill() methods

* Remove STDIN (0), STDOUT (1) and STDERR (2) constants from base_subprocess
  and unix_events, to not be confused with the symbols with the same name of
  subprocess and asyncio.subprocess modules
* _ProactorBasePipeTransport.get_write_buffer_size() now counts also the size
  of the pending write
* _ProactorBaseWritePipeTransport._loop_writing() may now pause the protocol if
  the write buffer size is greater than the high water mark (64 KB by default)
This commit is contained in:
Victor Stinner 2014-02-01 22:49:59 +01:00
parent 153d97b24e
commit 915bcb0111
9 changed files with 434 additions and 50 deletions
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15
Lib/test/test_asyncio/test_base_events.py
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@ -116,18 +116,17 @@ class BaseEventLoopTests(unittest.TestCase):
self.loop.stop()
self.loop._process_events = unittest.mock.Mock()
delay = 0.1
when = self.loop.time() + delay
when = self.loop.time() + 0.1
self.loop.call_at(when, cb)
t0 = self.loop.time()
self.loop.run_forever()
dt = self.loop.time() - t0
self.assertGreaterEqual(dt, delay - self.loop._granularity, dt)
# tolerate a difference of +800 ms because some Python buildbots
# are really slow
self.assertLessEqual(dt, 0.9, dt)
self.assertTrue(0.09 <= dt <= 0.9,
# Issue #20452: add more info in case of failure,
# to try to investigate the bug
(dt,
self.loop._granularity,
time.get_clock_info('monotonic')))
def test_run_once_in_executor_handle(self):
def cb():