def __init__(self,
kernel=None,
initfile=None,
consumer=None,
kernel_loglevel=logging.NOTSET,
stdin=PIPE,
stdout=PIPE,
stderr=PIPE,
**kwargs):
self.id = _thread_counter()
super().__init__(name='wolfram-kernel-%i' % self.id)
if kernel is None:
kernel = self.default_kernel_path()
if isinstance(kernel, six.string_types):
if not os.isfile(kernel):
raise WolframKernelException('Kernel not found at %s.' %
kernel)
elif not os.access(kernel, os.X_OK):
raise WolframKernelException('Cannot execute kernel %s.' %
kernel)
else:
self.kernel = kernel
else:
raise ValueError(
'Invalid kernel value. Expecting a filepath as a string.')
if initfile is None:
self.initfile = os.path_join(os.dirname(__file__), 'initkernel.m')
else:
self.initfile = initfile
if not os.isfile(self.initfile):
raise FileNotFoundError(
'Kernel initialization file %s not found.' % self.initfile)
if logger.isEnabledFor(logging.DEBUG):
logger.debug('Initializing kernel %s using script: %s' %
(self.kernel, self.initfile))
self.tasks_queue = Queue()
self.kernel_socket_in = None
self.kernel_socket_out = None
self.kernel_proc = None
self.consumer = consumer
self.loglevel = kernel_loglevel
self.kernel_logger = None
self.evaluation_count = 0
self._stdin = stdin
self._stdout = stdout
self._stderr = stderr
# some parameters may be passed as kwargs
self.parameters = {}
for k, v in kwargs.items():
try:
self.set_parameter(k, v)
# ignore kwargs unknowns key
except KeyError:
pass
# this is a state: this event is set when the kernel will not serve any more evaluation.
self._state_terminated = False
# lock controlling concurrent access to the state above.
self._state_lock = RLock()
# this is a trigger that will abort most blocking operations.
self.trigger_termination_requested = Event()
def find_default_kernel_path():
""" Look for the most recent installed kernel. """
rel = exe_path()
for path in installation_directories():
if rel:
path = os.path_join(path, rel)
if os.isfile(path):
return path
def explore_paths(*paths):
highest_version = -1
best_path = None
for root in paths:
if os.isdir(root):
for version in os.listdir(root):
full_path = os.path_join(root, version)
if os.isdir(full_path):
try:
v_num = float(version)
except ValueError:
v_num = -2
if v_num > highest_version and v_num > 0:
highest_version = v_num
best_path = full_path
if best_path:
yield best_path
def dir_test_data():
""" Return path to the data directory in tests"""
current_file_dir = os.dirname(__file__)
return os.path_join(current_file_dir, "data")
def __init__(self,
kernel=None,
initfile=None,
consumer=None,
kernel_loglevel=logging.NOTSET,
stdin=PIPE,
stdout=PIPE,
stderr=PIPE,
**kwargs):
self.id = _thread_counter()
super().__init__(name="wolfram-kernel-%i" % self.id)
self.kernel = kernel or self.default_kernel_path()
if self.kernel:
if not os.isfile(self.kernel):
raise WolframKernelException("Kernel not found at %s." %
self.kernel)
if not os.access(self.kernel, os.X_OK):
raise WolframKernelException("Cannot execute kernel %s." %
self.kernel)
else:
raise WolframKernelException(
"Cannot locate a kernel automatically. Please provide an explicit kernel path."
)
if initfile is None:
self.initfile = os.path_join(os.dirname(__file__), "initkernel.m")
else:
self.initfile = initfile
if not os.isfile(self.initfile):
raise FileNotFoundError(
"Kernel initialization file %s not found." % self.initfile)
if logger.isEnabledFor(logging.DEBUG):
logger.debug("Initializing kernel %s using script: %s" %
(self.kernel, self.initfile))
self.tasks_queue = Queue()
self.kernel_socket_in = None
self.kernel_socket_out = None
self.kernel_proc = None
self.consumer = consumer
self.loglevel = kernel_loglevel
self.kernel_logger = None
self.evaluation_count = 0
self._stdin = stdin
self._stdout = stdout
self._stderr = stderr
# some parameters may be passed as kwargs
self.parameters = {}
for k, v in kwargs.items():
try:
self.set_parameter(k, v)
# ignore kwargs unknowns key
except KeyError:
pass
# this is a state: this event is set when the kernel will not serve any more evaluation.
self._state_terminated = False
# lock controlling concurrent access to the state above.
self._state_lock = RLock()
# this is a trigger that will abort most blocking operations.
self.trigger_termination_requested = Event()
def dir_test_data():
''' Return path to the data directory in tests'''
current_file_dir = os.dirname(__file__)
return os.path_join(current_file_dir, 'data')