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def linear_cmap(field_name, palette, low, high, low_color=None, high_color=None, nan_color="gray"):
''' Create a ``DataSpec`` dict that applyies a client-side
``LinearColorMapper`` transformation to a ``ColumnDataSource`` column.
Args:
field_name (str) : a field name to configure ``DataSpec`` with
... |
def log_cmap(field_name, palette, low, high, low_color=None, high_color=None, nan_color="gray"):
''' Create a ``DataSpec`` dict that applies a client-side ``LogColorMapper``
transformation to a ``ColumnDataSource`` column.
Args:
field_name (str) : a field name to configure ``DataSpec`` with
... |
def get_browser_controller(browser=None):
''' Return a browser controller.
Args:
browser (str or None) : browser name, or ``None`` (default: ``None``)
If passed the string ``'none'``, a dummy web browser controller
is returned
Otherwise, use the value to select an a... |
def view(location, browser=None, new="same", autoraise=True):
''' Open a browser to view the specified location.
Args:
location (str) : Location to open
If location does not begin with "http:" it is assumed
to be a file path on the local filesystem.
... |
def from_py_func(cls, func):
''' Create a ``CustomJSFilter`` instance from a Python function. The
function is translated to JavaScript using PScript.
The ``func`` function namespace will contain the variable ``source``
at render time. This will be the data source associated with the ``C... |
def streamlines(x, y, u, v, density=1):
''' Return streamlines of a vector flow.
* x and y are 1d arrays defining an *evenly spaced* grid.
* u and v are 2d arrays (shape [y,x]) giving velocities.
* density controls the closeness of the streamlines. For different
densities in each direction, use a... |
def display_event(div, attributes=[]):
"""
Function to build a suitable CustomJS to display the current event
in the div model.
"""
style = 'float: left; clear: left; font-size: 10pt'
return CustomJS(args=dict(div=div), code="""
var attrs = %s;
var args = [];
for (var i =... |
def print_event(attributes=[]):
"""
Function that returns a Python callback to pretty print the events.
"""
def python_callback(event):
cls_name = event.__class__.__name__
attrs = ', '.join(['{attr}={val}'.format(attr=attr, val=event.__dict__[attr])
for attr in att... |
def create(self, msgtype, *args, **kwargs):
''' Create a new Message instance for the given type.
Args:
msgtype (str) :
'''
if msgtype not in self._messages:
raise ProtocolError("Unknown message type %r for protocol version %s" % (msgtype, self._version))
... |
def assemble(self, header_json, metadata_json, content_json):
''' Create a Message instance assembled from json fragments.
Args:
header_json (``JSON``) :
metadata_json (``JSON``) :
content_json (``JSON``) :
Returns:
message
'''
... |
def _combine_document_events(new_event, old_events):
''' Attempt to combine a new event with a list of previous events.
The ``old_event`` will be scanned in reverse, and ``.combine(new_event)``
will be called on each. If a combination can be made, the function
will return immediately. Otherwise, ``new_... |
def add_next_tick_callback(self, callback):
''' Add callback to be invoked once on the next tick of the event loop.
Args:
callback (callable) :
A callback function to execute on the next tick.
Returns:
NextTickCallback : can be used with ``remove_next_ti... |
def add_periodic_callback(self, callback, period_milliseconds):
''' Add a callback to be invoked on a session periodically.
Args:
callback (callable) :
A callback function to execute periodically
period_milliseconds (int) :
Number of milliseconds... |
def add_root(self, model, setter=None):
''' Add a model as a root of this Document.
Any changes to this model (including to other models referred to
by it) will trigger ``on_change`` callbacks registered on this
document.
Args:
model (Model) :
The mo... |
def add_timeout_callback(self, callback, timeout_milliseconds):
''' Add callback to be invoked once, after a specified timeout passes.
Args:
callback (callable) :
A callback function to execute after timeout
timeout_milliseconds (int) :
Number of... |
def apply_json_patch(self, patch, setter=None):
''' Apply a JSON patch object and process any resulting events.
Args:
patch (JSON-data) :
The JSON-object containing the patch to apply.
setter (ClientSession or ServerSession or None, optional) :
T... |
def clear(self):
''' Remove all content from the document but do not reset title.
Returns:
None
'''
self._push_all_models_freeze()
try:
while len(self._roots) > 0:
r = next(iter(self._roots))
self.remove_root(r)
fi... |
def delete_modules(self):
''' Clean up after any modules created by this Document when its session is
destroyed.
'''
from gc import get_referrers
from types import FrameType
log.debug("Deleting %s modules for %s" % (len(self._modules), self))
for module in self... |
def from_json(cls, json):
''' Load a document from JSON.
json (JSON-data) :
A JSON-encoded document to create a new Document from.
Returns:
Document :
'''
roots_json = json['roots']
root_ids = roots_json['root_ids']
references_json = roo... |
def hold(self, policy="combine"):
''' Activate a document hold.
While a hold is active, no model changes will be applied, or trigger
callbacks. Once ``unhold`` is called, the events collected during the
hold will be applied according to the hold policy.
Args:
hold (... |
def unhold(self):
''' Turn off any active document hold and apply any collected events.
Returns:
None
'''
# no-op if we are already no holding
if self._hold is None: return
self._hold = None
events = list(self._held_events)
self._held_events... |
def on_change(self, *callbacks):
''' Provide callbacks to invoke if the document or any Model reachable
from its roots changes.
'''
for callback in callbacks:
if callback in self._callbacks: continue
_check_callback(callback, ('event',))
self._call... |
def on_session_destroyed(self, *callbacks):
''' Provide callbacks to invoke when the session serving the Document
is destroyed
'''
for callback in callbacks:
_check_callback(callback, ('session_context',))
self._session_destroyed_callbacks.add(callback) |
def remove_root(self, model, setter=None):
''' Remove a model as root model from this Document.
Changes to this model may still trigger ``on_change`` callbacks
on this document, if the model is still referred to by other
root models.
Args:
model (Model) :
... |
def replace_with_json(self, json):
''' Overwrite everything in this document with the JSON-encoded
document.
json (JSON-data) :
A JSON-encoded document to overwrite this one.
Returns:
None
'''
replacement = self.from_json(json)
replaceme... |
def select(self, selector):
''' Query this document for objects that match the given selector.
Args:
selector (JSON-like query dictionary) : you can query by type or by
name, e.g. ``{"type": HoverTool}``, ``{"name": "mycircle"}``
Returns:
seq[Model]
... |
def select_one(self, selector):
''' Query this document for objects that match the given selector.
Raises an error if more than one object is found. Returns
single matching object, or None if nothing is found
Args:
selector (JSON-like query dictionary) : you can query by ty... |
def to_json_string(self, indent=None):
''' Convert the document to a JSON string.
Args:
indent (int or None, optional) : number of spaces to indent, or
None to suppress all newlines and indentation (default: None)
Returns:
str
'''
root_i... |
def validate(self):
''' Perform integrity checks on the modes in this document.
Returns:
None
'''
for r in self.roots:
refs = r.references()
check_integrity(refs) |
def _add_session_callback(self, callback_obj, callback, one_shot, originator):
''' Internal implementation for adding session callbacks.
Args:
callback_obj (SessionCallback) :
A session callback object that wraps a callable and is
passed to ``trigger_on_chang... |
def _destructively_move(self, dest_doc):
''' Move all data in this doc to the dest_doc, leaving this doc empty.
Args:
dest_doc (Document) :
The Bokeh document to populate with data from this one
Returns:
None
'''
if dest_doc is self:
... |
def _notify_change(self, model, attr, old, new, hint=None, setter=None, callback_invoker=None):
''' Called by Model when it changes
'''
# if name changes, update by-name index
if attr == 'name':
if old is not None:
self._all_models_by_name.remove_value(old, m... |
def _remove_session_callback(self, callback_obj, originator):
''' Remove a callback added earlier with ``add_periodic_callback``,
``add_timeout_callback``, or ``add_next_tick_callback``.
Returns:
None
Raises:
KeyError, if the callback was never added
''... |
def _check_callback(callback, fargs, what="Callback functions"):
'''Bokeh-internal function to check callback signature'''
sig = signature(callback)
formatted_args = format_signature(sig)
error_msg = what + " must have signature func(%s), got func%s"
all_names, default_values = get_param_info(sig)
... |
def on_change(self, attr, *callbacks):
''' Add a callback on this object to trigger when ``attr`` changes.
Args:
attr (str) : an attribute name on this object
callback (callable) : a callback function to register
Returns:
None
'''
if len(cal... |
def remove_on_change(self, attr, *callbacks):
''' Remove a callback from this object '''
if len(callbacks) == 0:
raise ValueError("remove_on_change takes an attribute name and one or more callbacks, got only one parameter")
_callbacks = self._callbacks.setdefault(attr, [])
fo... |
def trigger(self, attr, old, new, hint=None, setter=None):
''' Trigger callbacks for ``attr`` on this object.
Args:
attr (str) :
old (object) :
new (object) :
Returns:
None
'''
def invoke():
callbacks = self._callback... |
def download(progress=True):
''' Download larger data sets for various Bokeh examples.
'''
data_dir = external_data_dir(create=True)
print("Using data directory: %s" % data_dir)
s3 = 'https://bokeh-sampledata.s3.amazonaws.com'
files = [
(s3, 'CGM.csv'),
(s3, 'US_Counties.zip'),... |
def main(argv):
''' Execute the Bokeh command.
Args:
argv (seq[str]) : a list of command line arguments to process
Returns:
None
The first item in ``argv`` is typically "bokeh", and the second should
be the name of one of the available subcommands:
* :ref:`html <bokeh.command... |
def show(obj, browser=None, new="tab", notebook_handle=False, notebook_url="localhost:8888", **kw):
''' Immediately display a Bokeh object or application.
:func:`show` may be called multiple times in a single Jupyter notebook
cell to display multiple objects. The objects are displayed in order.
... |
def html_page_for_render_items(bundle, docs_json, render_items, title, template=None, template_variables={}):
''' Render an HTML page from a template and Bokeh render items.
Args:
bundle (tuple):
a tuple containing (bokehjs, bokehcss)
docs_json (JSON-like):
Serialized B... |
def extract_hosted_zip(data_url, save_dir, exclude_term=None):
"""Downloads, then extracts a zip file."""
zip_name = os.path.join(save_dir, 'temp.zip')
# get the zip file
try:
print('Downloading %r to %r' % (data_url, zip_name))
zip_name, hdrs = urllib.request.urlretrieve(url=data_url,... |
def extract_zip(zip_name, exclude_term=None):
"""Extracts a zip file to its containing directory."""
zip_dir = os.path.dirname(os.path.abspath(zip_name))
try:
with zipfile.ZipFile(zip_name) as z:
# write each zipped file out if it isn't a directory
files = [zip_file for zi... |
def value_as_datetime(self):
''' Convenience property to retrieve the value tuple as a tuple of
datetime objects.
'''
if self.value is None:
return None
v1, v2 = self.value
if isinstance(v1, numbers.Number):
d1 = datetime.utcfromtimestamp(v1 / 100... |
def value_as_date(self):
''' Convenience property to retrieve the value tuple as a tuple of
date objects.
Added in version 1.1
'''
if self.value is None:
return None
v1, v2 = self.value
if isinstance(v1, numbers.Number):
dt = datetime.utcf... |
def modify_document(self, doc):
''' Execute the configured ``main.py`` or ``main.ipynb`` to modify the
document.
This method will also search the app directory for any theme or
template files, and automatically configure the document with them
if they are found.
'''
... |
def markers():
''' Prints a list of valid marker types for scatter()
Returns:
None
'''
print("Available markers: \n\n - " + "\n - ".join(list(MarkerType)))
print()
print("Shortcuts: \n\n" + "\n".join(" %r: %s" % item for item in _MARKER_SHORTCUTS.items())) |
def scatter(self, *args, **kwargs):
''' Creates a scatter plot of the given x and y items.
Args:
x (str or seq[float]) : values or field names of center x coordinates
y (str or seq[float]) : values or field names of center y coordinates
size (str or list[float]) : ... |
def hexbin(self, x, y, size, orientation="pointytop", palette="Viridis256", line_color=None, fill_color=None, aspect_scale=1, **kwargs):
''' Perform a simple equal-weight hexagonal binning.
A :class:`~bokeh.models._glyphs.HexTile` glyph will be added to display
the binning. The :class:`~bokeh.m... |
def harea_stack(self, stackers, **kw):
''' Generate multiple ``HArea`` renderers for levels stacked left
to right.
Args:
stackers (seq[str]) : a list of data source field names to stack
successively for ``x1`` and ``x2`` harea coordinates.
Additional... |
def hbar_stack(self, stackers, **kw):
''' Generate multiple ``HBar`` renderers for levels stacked left to right.
Args:
stackers (seq[str]) : a list of data source field names to stack
successively for ``left`` and ``right`` bar coordinates.
Additionally, the... |
def line_stack(self, x, y, **kw):
''' Generate multiple ``Line`` renderers for lines stacked vertically
or horizontally.
Args:
x (seq[str]) :
y (seq[str]) :
Additionally, the ``name`` of the renderer will be set to
the value of each successive stacker (... |
def varea_stack(self, stackers, **kw):
''' Generate multiple ``VArea`` renderers for levels stacked bottom
to top.
Args:
stackers (seq[str]) : a list of data source field names to stack
successively for ``y1`` and ``y1`` varea coordinates.
Additional... |
def vbar_stack(self, stackers, **kw):
''' Generate multiple ``VBar`` renderers for levels stacked bottom
to top.
Args:
stackers (seq[str]) : a list of data source field names to stack
successively for ``left`` and ``right`` bar coordinates.
Additiona... |
def graph(self, node_source, edge_source, layout_provider, **kwargs):
''' Creates a network graph using the given node, edge and layout provider.
Args:
node_source (:class:`~bokeh.models.sources.ColumnDataSource`) : a user-supplied data source
for the graph nodes. An attempt... |
def server_url_for_websocket_url(url):
''' Convert an ``ws(s)`` URL for a Bokeh server into the appropriate
``http(s)`` URL for the websocket endpoint.
Args:
url (str):
An ``ws(s)`` URL ending in ``/ws``
Returns:
str:
The corresponding ``http(s)`` URL.
Rais... |
def websocket_url_for_server_url(url):
''' Convert an ``http(s)`` URL for a Bokeh server websocket endpoint into
the appropriate ``ws(s)`` URL
Args:
url (str):
An ``http(s)`` URL
Returns:
str:
The corresponding ``ws(s)`` URL ending in ``/ws``
Raises:
... |
def without_property_validation(input_function):
''' Turn off property validation during update callbacks
Example:
.. code-block:: python
@without_property_validation
def update(attr, old, new):
# do things without validation
See Also:
:class:`~boke... |
def get_env():
''' Get the correct Jinja2 Environment, also for frozen scripts.
'''
if getattr(sys, 'frozen', False) and hasattr(sys, '_MEIPASS'):
# PyInstaller uses _MEIPASS and only works with jinja2.FileSystemLoader
templates_path = join(sys._MEIPASS, 'bokeh', 'core', '_templates')
el... |
def parallel_plot(df, color=None, palette=None):
"""From a dataframe create a parallel coordinate plot
"""
npts = df.shape[0]
ndims = len(df.columns)
if color is None:
color = np.ones(npts)
if palette is None:
palette = ['#ff0000']
cmap = LinearColorMapper(high=color.min(),... |
def handle(self, message, connection):
''' Delegate a received message to the appropriate handler.
Args:
message (Message) :
The message that was receive that needs to be handled
connection (ServerConnection) :
The connection that received this m... |
def _needs_document_lock(func):
'''Decorator that adds the necessary locking and post-processing
to manipulate the session's document. Expects to decorate a
method on ServerSession and transforms it into a coroutine
if it wasn't already.
'''
@gen.coroutine
def _needs_document_lock_w... |
def unsubscribe(self, connection):
"""This should only be called by ``ServerConnection.unsubscribe_session`` or our book-keeping will be broken"""
self._subscribed_connections.discard(connection)
self._last_unsubscribe_time = current_time() |
def set_cwd(self, dirname):
"""Set shell current working directory."""
# Replace single for double backslashes on Windows
if os.name == 'nt':
dirname = dirname.replace(u"\\", u"\\\\")
if not self.external_kernel:
code = u"get_ipython().kernel.set_cwd(u'''{}''')".... |
def set_bracket_matcher_color_scheme(self, color_scheme):
"""Set color scheme for matched parentheses."""
bsh = sh.BaseSH(parent=self, color_scheme=color_scheme)
mpcolor = bsh.get_matched_p_color()
self._bracket_matcher.format.setBackground(mpcolor) |
def set_color_scheme(self, color_scheme, reset=True):
"""Set color scheme of the shell."""
self.set_bracket_matcher_color_scheme(color_scheme)
self.style_sheet, dark_color = create_qss_style(color_scheme)
self.syntax_style = color_scheme
self._style_sheet_changed()
self._... |
def long_banner(self):
"""Banner for IPython widgets with pylab message"""
# Default banner
try:
from IPython.core.usage import quick_guide
except Exception:
quick_guide = ''
banner_parts = [
'Python %s\n' % self.interpreter_versions['python_ve... |
def reset_namespace(self, warning=False, message=False):
"""Reset the namespace by removing all names defined by the user."""
reset_str = _("Remove all variables")
warn_str = _("All user-defined variables will be removed. "
"Are you sure you want to proceed?")
kernel... |
def create_shortcuts(self):
"""Create shortcuts for ipyconsole."""
inspect = config_shortcut(self._control.inspect_current_object,
context='Console',
name='Inspect current object', parent=self)
clear_console = config_shortcut(se... |
def silent_execute(self, code):
"""Execute code in the kernel without increasing the prompt"""
try:
self.kernel_client.execute(to_text_string(code), silent=True)
except AttributeError:
pass |
def silent_exec_method(self, code):
"""Silently execute a kernel method and save its reply
The methods passed here **don't** involve getting the value
of a variable but instead replies that can be handled by
ast.literal_eval.
To get a value see `get_value`
Parameters
... |
def handle_exec_method(self, msg):
"""
Handle data returned by silent executions of kernel methods
This is based on the _handle_exec_callback of RichJupyterWidget.
Therefore this is licensed BSD.
"""
user_exp = msg['content'].get('user_expressions')
if not user_e... |
def set_backend_for_mayavi(self, command):
"""
Mayavi plots require the Qt backend, so we try to detect if one is
generated to change backends
"""
calling_mayavi = False
lines = command.splitlines()
for l in lines:
if not l.startswith('#'):
... |
def change_mpl_backend(self, command):
"""
If the user is trying to change Matplotlib backends with
%matplotlib, send the same command again to the kernel to
correctly change it.
Fixes issue 4002
"""
if command.startswith('%matplotlib') and \
len(comman... |
def _context_menu_make(self, pos):
"""Reimplement the IPython context menu"""
menu = super(ShellWidget, self)._context_menu_make(pos)
return self.ipyclient.add_actions_to_context_menu(menu) |
def _banner_default(self):
"""
Reimplement banner creation to let the user decide if he wants a
banner or not
"""
# Don't change banner for external kernels
if self.external_kernel:
return ''
show_banner_o = self.additional_options['show_banner']
... |
def _syntax_style_changed(self):
"""Refresh the highlighting with the current syntax style by class."""
if self._highlighter is None:
# ignore premature calls
return
if self.syntax_style:
self._highlighter._style = create_style_class(self.syntax_style)
... |
def _prompt_started_hook(self):
"""Emit a signal when the prompt is ready."""
if not self._reading:
self._highlighter.highlighting_on = True
self.sig_prompt_ready.emit() |
def focusInEvent(self, event):
"""Reimplement Qt method to send focus change notification"""
self.focus_changed.emit()
return super(ShellWidget, self).focusInEvent(event) |
def focusOutEvent(self, event):
"""Reimplement Qt method to send focus change notification"""
self.focus_changed.emit()
return super(ShellWidget, self).focusOutEvent(event) |
def register(self, panel, position=Panel.Position.LEFT):
"""
Installs a panel on the editor.
:param panel: Panel to install
:param position: Position where the panel must be installed.
:return: The installed panel
"""
assert panel is not None
pos_to_strin... |
def remove(self, name_or_klass):
"""
Removes the specified panel.
:param name_or_klass: Name or class of the panel to remove.
:return: The removed panel
"""
logger.debug('removing panel %s' % name_or_klass)
panel = self.get(name_or_klass)
panel.on_uninsta... |
def clear(self):
"""Removes all panel from the CodeEditor."""
for i in range(4):
while len(self._panels[i]):
key = sorted(list(self._panels[i].keys()))[0]
panel = self.remove(key)
panel.setParent(None)
panel.deleteLater() |
def get(self, name_or_klass):
"""
Gets a specific panel instance.
:param name_or_klass: Name or class of the panel to retrieve.
:return: The specified panel instance.
"""
if not is_text_string(name_or_klass):
name_or_klass = name_or_klass.__name__
for... |
def refresh(self):
"""Refreshes the editor panels (resize and update margins)."""
logger.debug('Refresh panels')
self.resize()
self._update(self.editor.contentsRect(), 0,
force_update_margins=True) |
def resize(self):
"""Resizes panels."""
crect = self.editor.contentsRect()
view_crect = self.editor.viewport().contentsRect()
s_bottom, s_left, s_right, s_top = self._compute_zones_sizes()
tw = s_left + s_right
th = s_bottom + s_top
w_offset = crect.width() - (vie... |
def update_floating_panels(self):
"""Update foating panels."""
crect = self.editor.contentsRect()
panels = self.panels_for_zone(Panel.Position.FLOATING)
for panel in panels:
if not panel.isVisible():
continue
panel.set_geometry(crect) |
def _update_viewport_margins(self):
"""Update viewport margins."""
top = 0
left = 0
right = 0
bottom = 0
for panel in self.panels_for_zone(Panel.Position.LEFT):
if panel.isVisible():
width = panel.sizeHint().width()
left += widt... |
def _compute_zones_sizes(self):
"""Compute panel zone sizes."""
# Left panels
left = 0
for panel in self.panels_for_zone(Panel.Position.LEFT):
if not panel.isVisible():
continue
size_hint = panel.sizeHint()
left += size_hint.width()
... |
def python_like_mod_finder(import_line, alt_path=None,
stop_token=None):
"""
Locate a module path based on an import line in an python-like file
import_line is the line of source code containing the import
alt_path specifies an alternate base path for the module
st... |
def get_definition_with_regex(source, token, start_line=-1):
"""
Find the definition of an object within a source closest to a given line
"""
if not token:
return None
if DEBUG_EDITOR:
t0 = time.time()
patterns = [ # python / cython keyword definitions
r... |
def python_like_exts():
"""Return a list of all python-like extensions"""
exts = []
for lang in languages.PYTHON_LIKE_LANGUAGES:
exts.extend(list(languages.ALL_LANGUAGES[lang]))
return ['.' + ext for ext in exts] |
def all_editable_exts():
"""Return a list of all editable extensions"""
exts = []
for (language, extensions) in languages.ALL_LANGUAGES.items():
exts.extend(list(extensions))
return ['.' + ext for ext in exts] |
def _complete_path(path=None):
"""Perform completion of filesystem path.
https://stackoverflow.com/questions/5637124/tab-completion-in-pythons-raw-input
"""
if not path:
return _listdir('.')
dirname, rest = os.path.split(path)
tmp = dirname if dirname else '.'
res = [p for p ... |
def get_completions(self, info):
"""Return a list of (completion, type) tuples
Simple completion based on python-like identifiers and whitespace
"""
if not info['obj']:
return
items = []
obj = info['obj']
if info['context']:
lexe... |
def get_definition(self, info):
"""
Find the definition for an object within a set of source code
This is used to find the path of python-like modules
(e.g. cython and enaml) for a goto definition
"""
if not info['is_python_like']:
return
tok... |
def get_info(self, info):
"""Get a formatted calltip and docstring from Fallback"""
if info['docstring']:
if info['filename']:
filename = os.path.basename(info['filename'])
filename = os.path.splitext(filename)[0]
else:
filen... |
def create_dialog(obj, obj_name):
"""Creates the editor dialog and returns a tuple (dialog, func) where func
is the function to be called with the dialog instance as argument, after
quitting the dialog box
The role of this intermediate function is to allow easy monkey-patching.
(uschmitt... |
def oedit(obj, modal=True, namespace=None):
"""Edit the object 'obj' in a GUI-based editor and return the edited copy
(if Cancel is pressed, return None)
The object 'obj' is a container
Supported container types:
dict, list, set, tuple, str/unicode or numpy.array
(instantiate... |
def get_item_children(item):
"""Return a sorted list of all the children items of 'item'."""
children = [item.child(index) for index in range(item.childCount())]
for child in children[:]:
others = get_item_children(child)
if others is not None:
children += others
retur... |
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