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Batuhan Berk Başoğlu 2020-11-12 11:05:57 -05:00
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venv/Lib/site-packages/ipykernel/ipkernel.py Normal file
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"""The IPython kernel implementation"""
import asyncio
from contextlib import contextmanager
from functools import partial
import getpass
import signal
import sys
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 tornado import gen
from traitlets import Instance, Type, Any, List, Bool
from .comm import CommManager
from .kernelbase import Kernel as KernelBase
from .zmqshell import ZMQInteractiveShell
from .eventloops import _use_appnope
try:
from IPython.core.interactiveshell import _asyncio_runner
except ImportError:
_asyncio_runner = None
try:
from IPython.core.completer import rectify_completions as _rectify_completions, provisionalcompleter as _provisionalcompleter
_use_experimental_60_completion = True
except ImportError:
_use_experimental_60_completion = False
_EXPERIMENTAL_KEY_NAME = '_jupyter_types_experimental'
class IPythonKernel(KernelBase):
shell = Instance('IPython.core.interactiveshell.InteractiveShellABC',
allow_none=True)
shell_class = Type(ZMQInteractiveShell)
use_experimental_completions = Bool(True,
help="Set this flag to False to deactivate the use of experimental IPython completion APIs.",
).tag(config=True)
user_module = Any()
def _user_module_changed(self, name, old, new):
if self.shell is not None:
self.shell.user_module = new
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()
def __init__(self, **kwargs):
super(IPythonKernel, self).__init__(**kwargs)
# Initialize the InteractiveShell subclass
self.shell = self.shell_class.instance(parent=self,
profile_dir = self.profile_dir,
user_module = self.user_module,
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.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)
if _use_appnope() and self._darwin_app_nap:
# Disable app-nap as the kernel is not a gui but can have guis
import appnope
appnope.nope()
help_links = List([
{
'text': "Python Reference",
'url': "https://docs.python.org/%i.%i" % sys.version_info[:2],
},
{
'text': "IPython Reference",
'url': "https://ipython.org/documentation.html",
},
{
'text': "NumPy Reference",
'url': "https://docs.scipy.org/doc/numpy/reference/",
},
{
'text': "SciPy Reference",
'url': "https://docs.scipy.org/doc/scipy/reference/",
},
{
'text': "Matplotlib Reference",
'url': "https://matplotlib.org/contents.html",
},
{
'text': "SymPy Reference",
'url': "http://docs.sympy.org/latest/index.html",
},
{
'text': "pandas Reference",
'url': "https://pandas.pydata.org/pandas-docs/stable/",
},
]).tag(config=True)
# Kernel info fields
implementation = 'ipython'
implementation_version = release.version
language_info = {
'name': 'python',
'version': sys.version.split()[0],
'mimetype': 'text/x-python',
'codemirror_mode': {
'name': 'ipython',
'version': sys.version_info[0]
},
'pygments_lexer': 'ipython%d' % (3 if PY3 else 2),
'nbconvert_exporter': 'python',
'file_extension': '.py'
}
@property
def banner(self):
return self.shell.banner
def start(self):
self.shell.exit_now = False
super(IPythonKernel, self).start()
def set_parent(self, ident, parent):
"""Overridden from parent to tell the display hook and output streams
about the parent message.
"""
super(IPythonKernel, 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(IPythonKernel, 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 incrementing done by KernelBase, in favour of our shell's
# execution counter.
pass
@contextmanager
def _cancel_on_sigint(self, future):
"""ContextManager for capturing SIGINT and cancelling a future
SIGINT raises in the event loop when running async code,
but we want it to halt a coroutine.
Ideally, it would raise KeyboardInterrupt,
but this turns it into a CancelledError.
At least it gets a decent traceback to the user.
"""
sigint_future = asyncio.Future()
# whichever future finishes first,
# cancel the other one
def cancel_unless_done(f, _ignored):
if f.cancelled() or f.done():
return
f.cancel()
# when sigint finishes,
# abort the coroutine with CancelledError
sigint_future.add_done_callback(
partial(cancel_unless_done, future)
)
# when the main future finishes,
# stop watching for SIGINT events
future.add_done_callback(
partial(cancel_unless_done, sigint_future)
)
def handle_sigint(*args):
def set_sigint_result():
if sigint_future.cancelled() or sigint_future.done():
return
sigint_future.set_result(1)
# use add_callback for thread safety
self.io_loop.add_callback(set_sigint_result)
# set the custom sigint hander during this context
save_sigint = signal.signal(signal.SIGINT, handle_sigint)
try:
yield
finally:
# restore the previous sigint handler
signal.signal(signal.SIGINT, save_sigint)
@gen.coroutine
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 = {}
if hasattr(shell, 'run_cell_async') and hasattr(shell, 'should_run_async'):
run_cell = shell.run_cell_async
should_run_async = shell.should_run_async
else:
should_run_async = lambda cell: False
# older IPython,
# use blocking run_cell and wrap it in coroutine
@gen.coroutine
def run_cell(*args, **kwargs):
return shell.run_cell(*args, **kwargs)
try:
# default case: runner is asyncio and asyncio is already running
# TODO: this should check every case for "are we inside the runner",
# not just asyncio
if (
_asyncio_runner
and should_run_async(code)
and shell.loop_runner is _asyncio_runner
and asyncio.get_event_loop().is_running()
):
coro = run_cell(code, store_history=store_history, silent=silent)
coro_future = asyncio.ensure_future(coro)
with self._cancel_on_sigint(coro_future):
res = None
try:
res = yield coro_future
finally:
shell.events.trigger('post_execute')
if not silent:
shell.events.trigger('post_run_cell', res)
else:
# runner isn't already running,
# make synchronous call,
# letting shell dispatch to loop runners
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'
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: deprecated piece for ipyparallel (remove in 5.0):
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):
if _use_experimental_60_completion and self.use_experimental_completions:
return self._experimental_do_complete(code, cursor_pos)
# FIXME: IPython 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 _experimental_do_complete(self, code, cursor_pos):
"""
Experimental completions from IPython, using Jedi.
"""
if cursor_pos is None:
cursor_pos = len(code)
with _provisionalcompleter():
raw_completions = self.shell.Completer.completions(code, cursor_pos)
completions = list(_rectify_completions(code, raw_completions))
comps = []
for comp in completions:
comps.append(dict(
start=comp.start,
end=comp.end,
text=comp.text,
type=comp.type,
))
if completions:
s = completions[0].start
e = completions[0].end
matches = [c.text for c in completions]
else:
s = cursor_pos
e = cursor_pos
matches = []
return {'matches': matches,
'cursor_end': e,
'cursor_start': s,
'metadata': {_EXPERIMENTAL_KEY_NAME: comps},
'status': 'ok'}
def do_inspect(self, code, cursor_pos, detail_level=0):
name = token_at_cursor(code, cursor_pos)
reply_content = {'status' : 'ok'}
reply_content['data'] = {}
reply_content['metadata'] = {}
try:
reply_content['data'].update(
self.shell.object_inspect_mime(
name,
detail_level=detail_level
)
)
if not self.shell.enable_html_pager:
reply_content['data'].pop('text/html')
reply_content['found'] = True
except KeyError:
reply_content['found'] = False
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):
transformer_manager = getattr(self.shell, 'input_transformer_manager', None)
if transformer_manager is None:
# input_splitter attribute is deprecated
transformer_manager = self.shell.input_splitter
status, indent_spaces = 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 IPython 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: deprecated piece for ipyparallel (remove in 5.0):
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')
# This exists only for backwards compatibility - use IPythonKernel instead
class Kernel(IPythonKernel):
def __init__(self, *args, **kwargs):
import warnings
warnings.warn('Kernel is a deprecated alias of ipykernel.ipkernel.IPythonKernel',
DeprecationWarning)
super(Kernel, self).__init__(*args, **kwargs)