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Merge pull request #2439 from bfroehle/py3k_octal...
Merge pull request #2439 from bfroehle/py3k_octal 2to3: Apply numliterals fix for octals (e.g., 0777 -> 0o777).

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iostream.py
95 lines | 3.0 KiB | text/x-python | PythonLexer
import sys
import time
from io import StringIO
from session import extract_header, Message
from IPython.utils import io, text, encoding
from IPython.utils import py3compat
#-----------------------------------------------------------------------------
# Globals
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Stream classes
#-----------------------------------------------------------------------------
class OutStream(object):
"""A file like object that publishes the stream to a 0MQ PUB socket."""
# The time interval between automatic flushes, in seconds.
flush_interval = 0.05
topic=None
def __init__(self, session, pub_socket, name):
self.session = session
self.pub_socket = pub_socket
self.name = name
self.parent_header = {}
self._new_buffer()
def set_parent(self, parent):
self.parent_header = extract_header(parent)
def close(self):
self.pub_socket = None
def flush(self):
#io.rprint('>>>flushing output buffer: %s<<<' % self.name) # dbg
if self.pub_socket is None:
raise ValueError(u'I/O operation on closed file')
else:
data = self._buffer.getvalue()
if data:
content = {u'name':self.name, u'data':data}
msg = self.session.send(self.pub_socket, u'stream', content=content,
parent=self.parent_header, ident=self.topic)
if hasattr(self.pub_socket, 'flush'):
# socket itself has flush (presumably ZMQStream)
self.pub_socket.flush()
self._buffer.close()
self._new_buffer()
def isatty(self):
return False
def __next__(self):
raise IOError('Read not supported on a write only stream.')
if not py3compat.PY3:
next = __next__
def read(self, size=-1):
raise IOError('Read not supported on a write only stream.')
def readline(self, size=-1):
raise IOError('Read not supported on a write only stream.')
def write(self, string):
if self.pub_socket is None:
raise ValueError('I/O operation on closed file')
else:
# Make sure that we're handling unicode
if not isinstance(string, unicode):
enc = encoding.DEFAULT_ENCODING
string = string.decode(enc, 'replace')
self._buffer.write(string)
current_time = time.time()
if self._start <= 0:
self._start = current_time
elif current_time - self._start > self.flush_interval:
self.flush()
def writelines(self, sequence):
if self.pub_socket is None:
raise ValueError('I/O operation on closed file')
else:
for string in sequence:
self.write(string)
def _new_buffer(self):
self._buffer = StringIO()
self._start = -1