from __future__ import print_function
import signal
import yap
import io
import getpass
import sys
import traceback
from IPython.core import release
from ipython_genutils.py3compat import builtin_mod, PY3, unicode_type, safe_unicode
from IPython.utils.tokenutil import token_at_cursor, line_at_cursor
from traitlets import Instance, Type, Any, List
from ipykernel.comm import CommManager
from ipykernel.kernelbase import Kernel as KernelBase
from ipykernel.zmqshell import ZMQInteractiveShell
from .interactiveshell import YAPInteractiveShell
from IPython.core.interactiveshell import InteractiveShellABC, InteractiveShell
from contextlib import redirect_stdout
kernel_json = {
"argv": [sys.executable,
"-m", "yap_kernel",
"-f", "{connection_file}"],
"display_name": " YAP-6.3",
"language": "prolog",
"name": "yap_kernel",
}
def eprint(*args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
class YAPKernel(KernelBase):
shell = Instance('IPython.core.interactiveshell.InteractiveShellABC',
allow_none=True)
shell_class = Type(ZMQInteractiveShell )
user_ns = Instance(dict, args=None, allow_none=True)
def _user_ns_changed(self, name, old, new):
if self.shell is not None:
self.shell.user_ns = new
self.shell.init_user_ns()
# A reference to the Python builtin 'raw_input' function.
# (i.e., __builtin__.raw_input for Python 2.7, builtins.input for Python 3)
_sys_raw_input = Any()
_sys_eval_input = Any()
implementation = 'YAP Kernel'
implementation_version = '1.0'
language = 'text'
language_version = '6.3'
banner = "YAP-6.3"
language_info = {
'mimetype': 'text/prolog',
'name': 'text',
# ------ If different from 'language':
'codemirror_mode': {
"version": 2,
"name": "prolog"
},
'pygments_lexer': 'prolog',
'version': "0.0.1",
'file_extension': '.yap',
}
#-------------------------------------------------------------------------
# Things related to history management
#-------------------------------------------------------------------------
def __init__(self, **kwargs):
# sp = super(YAPKernel, self)
super(YAPKernel, self).__init__(**kwargs)
# Initialize the InteractiveShell subclass
self.shell = self.shell_class.instance(parent=self,
profile_dir = self.profile_dir,
user_ns = self.user_ns,
kernel = self,
)
self.shell.displayhook.session = self.session
self.shell.displayhook.pub_socket = self.iopub_socket
self.shell.displayhook.topic = self._topic('execute_result')
self.shell.display_pub.session = self.session
self.shell.display_pub.pub_socket = self.iopub_socket
self.comm_manager = CommManager(parent=self, kernel=self)
# self.shell._last_traceback = None
self.shell.configurables.append(self.comm_manager)
comm_msg_types = [ 'comm_open', 'comm_msg', 'comm_close' ]
for msg_type in comm_msg_types:
self.shell_handlers[msg_type] = getattr(self.comm_manager, msg_type)
self.yap_shell = YAPInteractiveShell( self )
def get_usage(self):
return "This is the YAP kernel."
help_links = List([
{
'text': "Python",
'url': "http://docs.python.org/%i.%i" % sys.version_info[:2],
},
{
'text': "YAP",
'url': "http://YAP.org/documentation.html",
},
{
'text': "NumPy",
'url': "http://docs.scipy.org/doc/numpy/reference/",
},
{
'text': "SciPy",
'url': "http://docs.scipy.org/doc/scipy/reference/",
},
{
'text': "Matplotlib",
'url': "http://matplotlib.org/contents.html",
},
{
'text': "SymPy",
'url': "http://docs.sympy.org/latest/index.html",
},
{
'text': "pandas",
'url': "http://pandas.pydata.org/pandas-docs/stable/",
},
]).tag(config=True)
# Kernel info fields
implementation = 'YAP'
implementation_version = release.version
language_info = {
'name': 'prolog',
'version': sys.version.split()[0],
'mimetype': 'text/x-prolog',
'codemirror_mode': {
'name': 'prolog',
'version': sys.version_info[0]
},
'pygments_lexer': 'prolog',
'nbconvert_exporter': 'python',
'file_extension': '.yap'
}
@property
def banner(self):
return self.shell.banner
def start(self):
self.shell.exit_now = False
super(YAPKernel, self).start()
def set_parent(self, ident, parent):
"""Overridden from parent to tell the display hook and output streams
about the parent message.
"""
super(YAPKernel, self).set_parent(ident, parent)
self.shell.set_parent(parent)
def init_metadata(self, parent):
"""Initialize metadata.
Run at the beginning of each execution request.
"""
md = super(YAPKernel, self).init_metadata(parent)
# FIXME: remove deprecated ipyparallel-specific code
# This is required for ipyparallel < 5.0
md.update({
'dependencies_met' : True,
'engine' : self.ident,
})
return md
def finish_metadata(self, parent, metadata, reply_content):
"""Finish populating metadata.
Run after completing an execution request.
"""
# FIXME: remove deprecated ipyparallel-specific code
# This is required by ipyparallel < 5.0
metadata['status'] = reply_content['status']
if reply_content['status'] == 'error' and reply_content['ename'] == 'UnmetDependency':
metadata['dependencies_met'] = False
return metadata
def _forward_input(self, allow_stdin=False):
"""Forward raw_input and getpass to the current frontend.
via input_request
"""
self._allow_stdin = allow_stdin
if PY3:
self._sys_raw_input = builtin_mod.input
builtin_mod.input = self.raw_input
else:
self._sys_raw_input = builtin_mod.raw_input
self._sys_eval_input = builtin_mod.input
builtin_mod.raw_input = self.raw_input
builtin_mod.input = lambda prompt='': eval(self.raw_input(prompt))
self._save_getpass = getpass.getpass
getpass.getpass = self.getpass
def _restore_input(self):
"""Restore raw_input, getpass"""
if PY3:
builtin_mod.input = self._sys_raw_input
else:
builtin_mod.raw_input = self._sys_raw_input
builtin_mod.input = self._sys_eval_input
getpass.getpass = self._save_getpass
@property
def execution_count(self):
return self.shell.execution_count
@execution_count.setter
def execution_count(self, value):
# Ignore the incrememnting done by KernelBase, in favour of our shell's
# execution counter.
pass
def do_execute(self, code, silent, store_history=True,
user_expressions=None, allow_stdin=False):
shell = self.shell # we'll need this a lot here
self._forward_input(allow_stdin)
reply_content = {}
try:
res = shell.run_cell(code, store_history=store_history, silent=silent)
finally:
self._restore_input()
if res.error_before_exec is not None:
err = res.error_before_exec
else:
err = res.error_in_exec
if res.success:
reply_content[u'status'] = u'ok'
elif isinstance(err, KeyboardInterrupt):
reply_content[u'status'] = u'aborted'
else:
reply_content[u'status'] = u'error'
reply_content.update({
# u'traceback': shell._last_traceback or [],
u'ename': unicode_type(type(err).__name__),
u'evalue': safe_unicode(err),
})
# FIXME: deprecate piece for ipyparallel:
e_info = dict(engine_uuid=self.ident, engine_id=self.int_id,
method='execute')
reply_content['engine_info'] = e_info
# Return the execution counter so clients can display prompts
reply_content['execution_count'] = shell.execution_count - 1
if 'traceback' in reply_content:
self.log.info("Exception in execute request:\n%s", '\n'.join(reply_content['traceback']))
# At this point, we can tell whether the main code execution succeeded
# or not. If it did, we proceed to evaluate user_expressions
if reply_content['status'] == 'ok':
reply_content[u'user_expressions'] = \
shell.user_expressions(user_expressions or {})
else:
# If there was an error, don't even try to compute expressions
reply_content[u'user_expressions'] = {}
# Payloads should be retrieved regardless of outcome, so we can both
# recover partial output (that could have been generated early in a
# block, before an error) and always clear the payload system.
reply_content[u'payload'] = shell.payload_manager.read_payload()
# Be aggressive about clearing the payload because we don't want
# it to sit in memory until the next execute_request comes in.
shell.payload_manager.clear_payload()
return reply_content
def do_complete(self, code, cursor_pos):
# FIXME: YAP completers currently assume single line,
# but completion messages give multi-line context
# For now, extract line from cell, based on cursor_pos:
if cursor_pos is None:
cursor_pos = len(code)
line, offset = line_at_cursor(code, cursor_pos)
line_cursor = cursor_pos - offset
txt, matches = self.shell.complete('', line, line_cursor)
return {'matches' : matches,
'cursor_end' : cursor_pos,
'cursor_start' : cursor_pos - len(txt),
'metadata' : {},
'status' : 'ok'}
def do_inspect(self, code, cursor_pos, detail_level=0):
name = token_at_cursor(code, cursor_pos)
info = self.shell.object_inspect(name)
reply_content = {'status' : 'ok'}
reply_content['data'] = data = {}
reply_content['metadata'] = {}
reply_content['found'] = info['found']
if info['found']:
info_text = self.shell.object_inspect_text(
name,
detail_level=detail_level,
)
data['text/plain'] = info_text
return reply_content
def do_history(self, hist_access_type, output, raw, session=0, start=0,
stop=None, n=None, pattern=None, unique=False):
if hist_access_type == 'tail':
hist = self.shell.history_manager.get_tail(n, raw=raw, output=output,
include_latest=True)
elif hist_access_type == 'range':
hist = self.shell.history_manager.get_range(session, start, stop,
raw=raw, output=output)
elif hist_access_type == 'search':
hist = self.shell.history_manager.search(
pattern, raw=raw, output=output, n=n, unique=unique)
else:
hist = []
return {
'status': 'ok',
'history' : list(hist),
}
def do_shutdown(self, restart):
self.shell.exit_now = True
return dict(status='ok', restart=restart)
def do_is_complete(self, code):
status, indent_spaces = self.shell.input_transformer_manager.check_complete(code)
r = {'status': status}
if status == 'incomplete':
r['indent'] = ' ' * indent_spaces
return r
def do_apply(self, content, bufs, msg_id, reply_metadata):
from .serialize import serialize_object, unpack_apply_message
shell = self.shell
try:
working = shell.user_ns
prefix = "_"+str(msg_id).replace("-","")+"_"
f,args,kwargs = unpack_apply_message(bufs, working, copy=False)
fname = getattr(f, '__name__', 'f')
fname = prefix+"f"
argname = prefix+"args"
kwargname = prefix+"kwargs"
resultname = prefix+"result"
ns = { fname : f, argname : args, kwargname : kwargs , resultname : None }
# print ns
working.update(ns)
code = "%s = %s(*%s,**%s)" % (resultname, fname, argname, kwargname)
try:
exec(code, shell.user_global_ns, shell.user_ns)
result = working.get(resultname)
finally:
for key in ns:
working.pop(key)
result_buf = serialize_object(result,
buffer_threshold=self.session.buffer_threshold,
item_threshold=self.session.item_threshold,
)
except BaseException as e:
# invoke YAP traceback formatting
shell.showtraceback()
reply_content = {
u'traceback': shell._last_traceback or [],
u'ename': unicode_type(type(e).__name__),
u'evalue': safe_unicode(e),
}
# FIXME: deprecate piece for ipyparallel:
e_info = dict(engine_uuid=self.ident, engine_id=self.int_id, method='apply')
reply_content['engine_info'] = e_info
self.send_response(self.iopub_socket, u'error', reply_content,
ident=self._topic('error'))
self.log.info("Exception in apply request:\n%s", '\n'.join(reply_content['traceback']))
result_buf = []
reply_content['status'] = 'error'
else:
reply_content = {'status' : 'ok'}
return reply_content, result_buf
def do_clear(self):
self.shell.reset(False)
return dict(status='ok')