mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 00:48:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

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

Browse source 
* 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
Download patch file Download diff file Expand all files Collapse all files

23
Lib/asyncio/base_subprocess.py
View file

@ -6,11 +6,6 @@ from . import tasks
from . import transports
STDIN = 0
STDOUT = 1
STDERR = 2
class BaseSubprocessTransport(transports.SubprocessTransport):
def __init__(self, loop, protocol, args, shell,
@ -22,11 +17,11 @@ class BaseSubprocessTransport(transports.SubprocessTransport):
self._pipes = {}
if stdin == subprocess.PIPE:
self._pipes[STDIN] = None
self._pipes[0] = None
if stdout == subprocess.PIPE:
self._pipes[STDOUT] = None
self._pipes[1] = None
if stderr == subprocess.PIPE:
self._pipes[STDERR] = None
self._pipes[2] = None
self._pending_calls = collections.deque()
self._finished = False
self._returncode = None
@ -76,19 +71,19 @@ class BaseSubprocessTransport(transports.SubprocessTransport):
loop = self._loop
if proc.stdin is not None:
_, pipe = yield from loop.connect_write_pipe(
lambda: WriteSubprocessPipeProto(self, STDIN),
lambda: WriteSubprocessPipeProto(self, 0),
proc.stdin)
self._pipes[STDIN] = pipe
self._pipes[0] = pipe
if proc.stdout is not None:
_, pipe = yield from loop.connect_read_pipe(
lambda: ReadSubprocessPipeProto(self, STDOUT),
lambda: ReadSubprocessPipeProto(self, 1),
proc.stdout)
self._pipes[STDOUT] = pipe
self._pipes[1] = pipe
if proc.stderr is not None:
_, pipe = yield from loop.connect_read_pipe(
lambda: ReadSubprocessPipeProto(self, STDERR),
lambda: ReadSubprocessPipeProto(self, 2),
proc.stderr)
self._pipes[STDERR] = pipe
self._pipes[2] = pipe
assert self._pending_calls is not None