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Use default OS shell to run system commands...
Use default OS shell to run system commands Instead of using os.system which uses /bin/sh, this uses subprocess.call (the replacement of os.system) to run the command using the default shell of the OS. With this, one can use more advanced commands for bash, zsh, ksh, ... I also edited the docstring, added comments and fixed the handling of return codes.

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managerabc.py
225 lines | 5.0 KiB | text/x-python | PythonLexer
"""Abstract base classes for kernel manager and channels."""
#-----------------------------------------------------------------------------
# Copyright (C) 2013 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
#-----------------------------------------------------------------------------
# Standard library imports.
import abc
#-----------------------------------------------------------------------------
# Channels
#-----------------------------------------------------------------------------
class ChannelABC(object):
"""A base class for all channel ABCs."""
__metaclass__ = abc.ABCMeta
@abc.abstractmethod
def start(self):
pass
@abc.abstractmethod
def stop(self):
pass
@abc.abstractmethod
def is_alive(self):
pass
class ShellChannelABC(ChannelABC):
"""ShellChannel ABC.
The docstrings for this class can be found in the base implementation:
`IPython.kernel.kernelmanager.ShellChannel`
"""
@abc.abstractproperty
def allow_stdin(self):
pass
@abc.abstractmethod
def execute(self, code, silent=False, store_history=True,
user_variables=None, user_expressions=None, allow_stdin=None):
pass
@abc.abstractmethod
def complete(self, text, line, cursor_pos, block=None):
pass
@abc.abstractmethod
def object_info(self, oname, detail_level=0):
pass
@abc.abstractmethod
def history(self, raw=True, output=False, hist_access_type='range', **kwargs):
pass
@abc.abstractmethod
def kernel_info(self):
pass
@abc.abstractmethod
def shutdown(self, restart=False):
pass
class IOPubChannelABC(ChannelABC):
"""IOPubChannel ABC.
The docstrings for this class can be found in the base implementation:
`IPython.kernel.kernelmanager.IOPubChannel`
"""
@abc.abstractmethod
def flush(self, timeout=1.0):
pass
class StdInChannelABC(ChannelABC):
"""StdInChannel ABC.
The docstrings for this class can be found in the base implementation:
`IPython.kernel.kernelmanager.StdInChannel`
"""
@abc.abstractmethod
def input(self, string):
pass
class HBChannelABC(ChannelABC):
"""HBChannel ABC.
The docstrings for this class can be found in the base implementation:
`IPython.kernel.kernelmanager.HBChannel`
"""
@abc.abstractproperty
def time_to_dead(self):
pass
@abc.abstractmethod
def pause(self):
pass
@abc.abstractmethod
def unpause(self):
pass
@abc.abstractmethod
def is_beating(self):
pass
#-----------------------------------------------------------------------------
# Main kernel manager class
#-----------------------------------------------------------------------------
class KernelManagerABC(object):
"""KernelManager ABC.
The docstrings for this class can be found in the base implementation:
`IPython.kernel.kernelmanager.KernelManager`
"""
__metaclass__ = abc.ABCMeta
@abc.abstractproperty
def kernel(self):
pass
@abc.abstractproperty
def shell_channel_class(self):
pass
@abc.abstractproperty
def iopub_channel_class(self):
pass
@abc.abstractproperty
def hb_channel_class(self):
pass
@abc.abstractproperty
def stdin_channel_class(self):
pass
#--------------------------------------------------------------------------
# Channel management methods
#--------------------------------------------------------------------------
@abc.abstractmethod
def start_channels(self, shell=True, iopub=True, stdin=True, hb=True):
pass
@abc.abstractmethod
def stop_channels(self):
pass
@abc.abstractproperty
def channels_running(self):
pass
@abc.abstractproperty
def shell_channel(self):
pass
@abc.abstractproperty
def iopub_channel(self):
pass
@abc.abstractproperty
def stdin_channel(self):
pass
@abc.abstractproperty
def hb_channel(self):
pass
#--------------------------------------------------------------------------
# Kernel management
#--------------------------------------------------------------------------
@abc.abstractmethod
def start_kernel(self, **kw):
pass
@abc.abstractmethod
def shutdown_kernel(self, now=False, restart=False):
pass
@abc.abstractmethod
def restart_kernel(self, now=False, **kw):
pass
@abc.abstractproperty
def has_kernel(self):
pass
@abc.abstractmethod
def interrupt_kernel(self):
pass
@abc.abstractmethod
def signal_kernel(self, signum):
pass
@abc.abstractmethod
def is_alive(self):
pass