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add dirty trick for readline import on OSX...
add dirty trick for readline import on OSX also made the libedit warning extremely loud, so people don't miss it. We still get reports of people never having noticed the warning, and getting confused when readline is broken on OSX. The reason for the dirty trick: pip installs to site-packages by default, but site-packages dirs always come *after* lib-dynload (and extras, etc.), which is where the system readline is installed. That means that a non-setuptools install (pip or setup.py install) *cannot* override any package that ships with OSX, including: numpy, readline, twisted, pyobjc without installing to a non-standard path (not even user site-packages via `--user`). The method for the dirty trick: 1. remove lib-dynload from sys.path before trying to import readline the first time 2. after import, restore lib-dynload to its place in sys.path 3. if import failed without lib-dynload, try it one more time
Thomas Spura - - Load All Authors

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win32support.py
72 lines | 2.1 KiB | text/x-python | PythonLexer
/ IPython / parallel / apps / win32support.py
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"""Utility for forwarding file read events over a zmq socket.
This is necessary because select on Windows only supports sockets, not FDs.
Authors:
* MinRK
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import uuid
import zmq
from threading import Thread
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
class ForwarderThread(Thread):
def __init__(self, sock, fd):
Thread.__init__(self)
self.daemon=True
self.sock = sock
self.fd = fd
def run(self):
"""Loop through lines in self.fd, and send them over self.sock."""
line = self.fd.readline()
# allow for files opened in unicode mode
if isinstance(line, unicode):
send = self.sock.send_unicode
else:
send = self.sock.send
while line:
send(line)
line = self.fd.readline()
# line == '' means EOF
self.fd.close()
self.sock.close()
def forward_read_events(fd, context=None):
"""Forward read events from an FD over a socket.
This method wraps a file in a socket pair, so it can
be polled for read events by select (specifically zmq.eventloop.ioloop)
"""
if context is None:
context = zmq.Context.instance()
push = context.socket(zmq.PUSH)
push.setsockopt(zmq.LINGER, -1)
pull = context.socket(zmq.PULL)
addr='inproc://%s'%uuid.uuid4()
push.bind(addr)
pull.connect(addr)
forwarder = ForwarderThread(push, fd)
forwarder.start()
return pull
__all__ = ['forward_read_events']