def __init__(self, object, params={}, **kwargs):
if signature is None:
raise ImportError(
'interact requires either recent Python version '
'(>=3.3 or IPython to inspect function signatures.')
super(interactive, self).__init__(object, **params)
new_kwargs = self.find_abbreviations(kwargs)
# Before we proceed, let's make sure that the user has passed a set of args+kwargs
# that will lead to a valid call of the function. This protects against unspecified
# and doubly-specified arguments.
try:
check_argspec(object)
except TypeError:
# if we can't inspect, we can't validate
pass
else:
getcallargs(object, **{n: v for n, v, _ in new_kwargs})
widgets = self.widgets_from_abbreviations(new_kwargs)
if self.manual_update:
widgets.append(('manual', Button(name=self.manual_name)))
self._widgets = OrderedDict(widgets)
self._pane = panel(self.object(**self.kwargs), name=self.name)
self._inner_layout = Row(self._pane)
widgets = [
widget for _, widget in widgets if isinstance(widget, Widget)
]
if 'name' in params:
widgets.insert(0, HTML('<h2>%s</h2>' % self.name))
self.widget_box = Column(*widgets)
self.layout.objects = [self.widget_box, self._inner_layout]
self._link_widgets()
def __init__(self, object, params={}, **kwargs):
super(interactive, self).__init__(object, **params)
new_kwargs = self.find_abbreviations(kwargs)
# Before we proceed, let's make sure that the user has passed a set of args+kwargs
# that will lead to a valid call of the function. This protects against unspecified
# and doubly-specified arguments.
try:
check_argspec(object)
except TypeError:
# if we can't inspect, we can't validate
pass
else:
getcallargs(object, **{n: v for n, v, _ in new_kwargs})
widgets = self.widgets_from_abbreviations(new_kwargs)
if self.manual_update:
widgets.append(('manual', Button(name=self.manual_name)))
self._widgets = OrderedDict(widgets)
self._pane = Pane(self.object(**self.kwargs),
name=self.name,
_temporary=True)
self._inner_layout = Row(self._pane)
self.widget_box = WidgetBox(*(widget for _, widget in widgets
if isinstance(widget, Widget)))
self.layout.objects = [self.widget_box, self._inner_layout]
self._link_widgets()
def __init__(self, __interact_f, __options={}, **kwargs):
VBox.__init__(self, _dom_classes=['widget-interact'])
self.result = None
self.args = []
self.kwargs = {}
self.f = f = __interact_f
self.clear_output = kwargs.pop('clear_output', True)
self.manual = __options.get("manual", False)
self.manual_name = __options.get("manual_name", "Run Interact")
self.auto_display = __options.get("auto_display", False)
new_kwargs = self.find_abbreviations(kwargs)
# Before we proceed, let's make sure that the user has passed a set of args+kwargs
# that will lead to a valid call of the function. This protects against unspecified
# and doubly-specified arguments.
try:
check_argspec(f)
except TypeError:
# if we can't inspect, we can't validate
pass
else:
getcallargs(f, **{n:v for n,v,_ in new_kwargs})
# Now build the widgets from the abbreviations.
self.kwargs_widgets = self.widgets_from_abbreviations(new_kwargs)
# This has to be done as an assignment, not using self.children.append,
# so that traitlets notices the update. We skip any objects (such as fixed) that
# are not DOMWidgets.
c = [w for w in self.kwargs_widgets if isinstance(w, DOMWidget)]
# If we are only to run the function on demand, add a button to request this.
if self.manual:
self.manual_button = Button(description=self.manual_name)
c.append(self.manual_button)
self.out = Output()
c.append(self.out)
self.children = c
# Wire up the widgets
# If we are doing manual running, the callback is only triggered by the button
# Otherwise, it is triggered for every trait change received
# On-demand running also suppresses running the function with the initial parameters
if self.manual:
self.manual_button.on_click(self.update)
# Also register input handlers on text areas, so the user can hit return to
# invoke execution.
for w in self.kwargs_widgets:
if isinstance(w, Text):
w.on_submit(self.update)
else:
for widget in self.kwargs_widgets:
widget.observe(self.update, names='value')
self.on_displayed(self.update)
def __init__(self, __interact_f, __options={}, **kwargs):
VBox.__init__(self, _dom_classes=['widget-interact'])
self.result = None
self.args = []
self.kwargs = {}
self.f = f = __interact_f
self.clear_output = kwargs.pop('clear_output', True)
self.manual = __options.get("manual", False)
self.manual_name = __options.get("manual_name", "Run Interact")
self.auto_display = __options.get("auto_display", False)
new_kwargs = self.find_abbreviations(kwargs)
# Before we proceed, let's make sure that the user has passed a set of args+kwargs
# that will lead to a valid call of the function. This protects against unspecified
# and doubly-specified arguments.
try:
check_argspec(f)
except TypeError:
# if we can't inspect, we can't validate
pass
else:
getcallargs(f, **{n: v for n, v, _ in new_kwargs})
# Now build the widgets from the abbreviations.
self.kwargs_widgets = self.widgets_from_abbreviations(new_kwargs)
# This has to be done as an assignment, not using self.children.append,
# so that traitlets notices the update. We skip any objects (such as fixed) that
# are not DOMWidgets.
c = [w for w in self.kwargs_widgets if isinstance(w, DOMWidget)]
# If we are only to run the function on demand, add a button to request this.
if self.manual:
self.manual_button = Button(description=self.manual_name)
c.append(self.manual_button)
self.out = Output()
c.append(self.out)
self.children = c
# Wire up the widgets
# If we are doing manual running, the callback is only triggered by the button
# Otherwise, it is triggered for every trait change received
# On-demand running also suppresses running the function with the initial parameters
if self.manual:
self.manual_button.on_click(self.update)
# Also register input handlers on text areas, so the user can hit return to
# invoke execution.
for w in self.kwargs_widgets:
if isinstance(w, Text):
w.on_submit(self.update)
else:
for widget in self.kwargs_widgets:
widget.observe(self.update, names='value')
self.on_displayed(self.update)
def __call__(self, __interact_f=None, **kwargs):
"""
Make the given function interactive by adding and displaying
the corresponding :class:`interactive` widget.
Expects the first argument to be a function. Parameters to this
function are widget abbreviations passed in as keyword arguments
(``**kwargs``). Can be used as a decorator (see examples).
Returns
-------
f : __interact_f with interactive widget attached to it.
Parameters
----------
__interact_f : function
The function to which the interactive widgets are tied. The `**kwargs`
should match the function signature. Passed to :func:`interactive()`
**kwargs : various, optional
An interactive widget is created for each keyword argument that is a
valid widget abbreviation. Passed to :func:`interactive()`
Examples
--------
Render an interactive text field that shows the greeting with the passed in
text::
# 1. Using interact as a function
def greeting(text="World"):
print("Hello {}".format(text))
interact(greeting, text="IPython Widgets")
# 2. Using interact as a decorator
@interact
def greeting(text="World"):
print("Hello {}".format(text))
# 3. Using interact as a decorator with named parameters
@interact(text="IPython Widgets")
def greeting(text="World"):
print("Hello {}".format(text))
Render an interactive slider widget and prints square of number::
# 1. Using interact as a function
def square(num=1):
print("{} squared is {}".format(num, num*num))
interact(square, num=5)
# 2. Using interact as a decorator
@interact
def square(num=2):
print("{} squared is {}".format(num, num*num))
# 3. Using interact as a decorator with named parameters
@interact(num=5)
def square(num=2):
print("{} squared is {}".format(num, num*num))
"""
# If kwargs are given, replace self by a new
# _InteractFactory with the updated kwargs
if kwargs:
params = list(interactive.param)
kw = dict(self.kwargs)
kw.update({k: v for k, v in kwargs.items() if k not in params})
opts = dict(self.opts,
**{k: v
for k, v in kwargs.items() if k in params})
self = type(self)(self.cls, opts, kw)
f = __interact_f
if f is None:
# This branch handles the case 3
# @interact(a=30, b=40)
# def f(*args, **kwargs):
# ...
#
# Simply return the new factory
return self
elif 'throttled' in check_argspec(f).args:
raise ValueError(
'A function cannot have "throttled" as an argument')
# positional arg support in: https://gist.github.com/8851331
# Handle the cases 1 and 2
# 1. interact(f, **kwargs)
# 2. @interact
# def f(*args, **kwargs):
# ...
w = self.widget(f)
try:
f.widget = w
except AttributeError:
# some things (instancemethods) can't have attributes attached,
# so wrap in a lambda
f = lambda *args, **kwargs: __interact_f(*args, **kwargs)
f.widget = w
return w.layout
def interactive(__interact_f, **kwargs):
"""
Builds a group of interactive widgets tied to a function and places the
group into a Box container.
Returns
-------
container : a Box instance containing multiple widgets
Parameters
----------
__interact_f : function
The function to which the interactive widgets are tied. The `**kwargs`
should match the function signature.
**kwargs : various, optional
An interactive widget is created for each keyword argument that is a
valid widget abbreviation.
"""
f = __interact_f
co = kwargs.pop('clear_output', True)
manual = kwargs.pop('__manual', False)
kwargs_widgets = []
container = Box(_dom_classes=['widget-interact'])
container.result = None
container.args = []
container.kwargs = dict()
kwargs = kwargs.copy()
new_kwargs = _find_abbreviations(f, kwargs)
# Before we proceed, let's make sure that the user has passed a set of args+kwargs
# that will lead to a valid call of the function. This protects against unspecified
# and doubly-specified arguments.
try:
check_argspec(f)
except TypeError:
# if we can't inspect, we can't validate
pass
else:
getcallargs(f, **{n: v for n, v, _ in new_kwargs})
# Now build the widgets from the abbreviations.
kwargs_widgets.extend(_widgets_from_abbreviations(new_kwargs))
# This has to be done as an assignment, not using container.children.append,
# so that traitlets notices the update. We skip any objects (such as fixed) that
# are not DOMWidgets.
c = [w for w in kwargs_widgets if isinstance(w, DOMWidget)]
# If we are only to run the function on demand, add a button to request this.
if manual:
manual_button = Button(description="Run %s" % f.__name__)
c.append(manual_button)
out = Output()
c.append(out)
container.children = c
# Build the callback
def call_f(*args):
container.kwargs = {}
for widget in kwargs_widgets:
value = widget.value
container.kwargs[widget._kwarg] = value
if manual:
manual_button.disabled = True
try:
with out:
if co:
clear_output(wait=True)
container.result = f(**container.kwargs)
if container.result is not None:
display(container.result)
except Exception as e:
ip = get_ipython()
if ip is None:
container.log.warn("Exception in interact callback: %s",
e,
exc_info=True)
else:
ip.showtraceback()
finally:
if manual:
manual_button.disabled = False
# Wire up the widgets
# If we are doing manual running, the callback is only triggered by the button
# Otherwise, it is triggered for every trait change received
# On-demand running also suppresses running the function with the initial parameters
if manual:
manual_button.on_click(call_f)
# Also register input handlers on text areas, so the user can hit return to
# invoke execution.
for w in kwargs_widgets:
if isinstance(w, Text):
w.on_submit(call_f)
else:
for widget in kwargs_widgets:
widget.observe(call_f, names='value')
container.on_displayed(
lambda _: call_f(dict(name=None, old=None, new=None)))
return container
def interactive(__interact_f, **kwargs):
"""
Builds a group of interactive widgets tied to a function and places the
group into a Box container.
Returns
-------
container : a Box instance containing multiple widgets
Parameters
----------
__interact_f : function
The function to which the interactive widgets are tied. The `**kwargs`
should match the function signature.
**kwargs : various, optional
An interactive widget is created for each keyword argument that is a
valid widget abbreviation.
"""
f = __interact_f
co = kwargs.pop('clear_output', True)
manual = kwargs.pop('__manual', False)
kwargs_widgets = []
container = Box(_dom_classes=['widget-interact'])
container.result = None
container.args = []
container.kwargs = dict()
kwargs = kwargs.copy()
new_kwargs = _find_abbreviations(f, kwargs)
# Before we proceed, let's make sure that the user has passed a set of args+kwargs
# that will lead to a valid call of the function. This protects against unspecified
# and doubly-specified arguments.
try:
check_argspec(f)
except TypeError:
# if we can't inspect, we can't validate
pass
else:
getcallargs(f, **{n:v for n,v,_ in new_kwargs})
# Now build the widgets from the abbreviations.
kwargs_widgets.extend(_widgets_from_abbreviations(new_kwargs))
# This has to be done as an assignment, not using container.children.append,
# so that traitlets notices the update. We skip any objects (such as fixed) that
# are not DOMWidgets.
c = [w for w in kwargs_widgets if isinstance(w, DOMWidget)]
# If we are only to run the function on demand, add a button to request this.
if manual:
manual_button = Button(description="Run %s" % f.__name__)
c.append(manual_button)
container.children = c
# Build the callback
def call_f(*args):
container.kwargs = {}
for widget in kwargs_widgets:
value = widget.value
container.kwargs[widget._kwarg] = value
if co:
clear_output(wait=True)
if manual:
manual_button.disabled = True
try:
container.result = f(**container.kwargs)
if container.result is not None:
display(container.result)
except Exception as e:
ip = get_ipython()
if ip is None:
container.log.warn("Exception in interact callback: %s", e, exc_info=True)
else:
ip.showtraceback()
finally:
if manual:
manual_button.disabled = False
# Wire up the widgets
# If we are doing manual running, the callback is only triggered by the button
# Otherwise, it is triggered for every trait change received
# On-demand running also suppresses running the function with the initial parameters
if manual:
manual_button.on_click(call_f)
# Also register input handlers on text areas, so the user can hit return to
# invoke execution.
for w in kwargs_widgets:
if isinstance(w, Text):
w.on_submit(call_f)
else:
for widget in kwargs_widgets:
widget.observe(call_f, names='value')
container.on_displayed(lambda _: call_f(dict(name=None, old=None, new=None)))
return container
