Widget List

In [1]:
import ipywidgets as widgets

Numeric widgets

There are 10 widgets distributed with IPython that are designed to display numeric values. Widgets exist for displaying integers and floats, both bounded and unbounded. The integer widgets share a similar naming scheme to their floating point counterparts. By replacing Float with Int in the widget name, you can find the Integer equivalent.

IntSlider

In [2]:
widgets.IntSlider(
    value=7,
    min=0,
    max=10,
    step=1,
    description='Test:',
    disabled=False,
    continuous_update=False,
    orientation='horizontal',
    readout=True,
    readout_format='d'
)

FloatSlider

In [3]:
widgets.FloatSlider(
    value=7.5,
    min=0,
    max=10.0,
    step=0.1,
    description='Test:',
    disabled=False,
    continuous_update=False,
    orientation='horizontal',
    readout=True,
    readout_format='.1f',
)

Sliders can also be displayed vertically.

In [4]:
widgets.FloatSlider(
    value=7.5,
    min=0,
    max=10.0,
    step=0.1,
    description='Test:',
    disabled=False,
    continuous_update=False,
    orientation='vertical',
    readout=True,
    readout_format='.1f',
)

IntRangeSlider

In [5]:
widgets.IntRangeSlider(
    value=[5, 7],
    min=0,
    max=10,
    step=1,
    description='Test:',
    disabled=False,
    continuous_update=False,
    orientation='horizontal',
    readout=True,
    readout_format='d',
)

FloatRangeSlider

In [6]:
widgets.FloatRangeSlider(
    value=[5, 7.5],
    min=0,
    max=10.0,
    step=0.1,
    description='Test:',
    disabled=False,
    continuous_update=False,
    orientation='horizontal',
    readout=True,
    readout_format='.1f',
)

IntProgress

In [7]:
widgets.IntProgress(
    value=7,
    min=0,
    max=10,
    step=1,
    description='Loading:',
    bar_style='', # 'success', 'info', 'warning', 'danger' or ''
    orientation='horizontal'
)

FloatProgress

In [8]:
widgets.FloatProgress(
    value=7.5,
    min=0,
    max=10.0,
    step=0.1,
    description='Loading:',
    bar_style='info',
    orientation='horizontal'
)

The numerical text boxes that impose some limit on the data (range, integer-only) impose that restriction when the user presses enter.

BoundedIntText

In [9]:
widgets.BoundedIntText(
    value=7,
    min=0,
    max=10,
    step=1,
    description='Text:',
    disabled=False
)

BoundedFloatText

In [10]:
widgets.BoundedFloatText(
    value=7.5,
    min=0,
    max=10.0,
    step=0.1,
    description='Text:',
    disabled=False
)

IntText

In [11]:
widgets.IntText(
    value=7,
    description='Any:',
    disabled=False
)

FloatText

In [12]:
widgets.FloatText(
    value=7.5,
    description='Any:',
    disabled=False
)

Boolean widgets

There are three widgets that are designed to display a boolean value.

ToggleButton

In [13]:
widgets.ToggleButton(
    value=False,
    description='Click me',
    disabled=False,
    button_style='', # 'success', 'info', 'warning', 'danger' or ''
    tooltip='Description',
    icon='check'
)

Checkbox

In [14]:
widgets.Checkbox(
    value=False,
    description='Check me',
    disabled=False
)

Valid

The valid widget provides a read-only indicator.

In [15]:
widgets.Valid(
    value=False,
    description='Valid!',
)

Selection widgets

There are several widgets that can be used to display single selection lists, and two that can be used to select multiple values. All inherit from the same base class. You can specify the enumeration of selectable options by passing a list (options are either (label, value) pairs, or simply values for which the labels are derived by calling str). You can also specify the enumeration as a dictionary, in which case the keys will be used as the item displayed in the list and the corresponding value will be used when an item is selected (in this case, since dictionaries are unordered, the displayed order of items in the widget is unspecified).

In [16]:
widgets.Dropdown(
    options=['1', '2', '3'],
    value='2',
    description='Number:',
    disabled=False,
)

The following is also valid:

In [17]:
widgets.Dropdown(
    options={'One': 1, 'Two': 2, 'Three': 3},
    value=2,
    description='Number:',
)

RadioButtons

In [18]:
widgets.RadioButtons(
    options=['pepperoni', 'pineapple', 'anchovies'],
#     value='pineapple',
    description='Pizza topping:',
    disabled=False
)

Select

In [19]:
widgets.Select(
    options=['Linux', 'Windows', 'OSX'],
    value='OSX',
    # rows=10,
    description='OS:',
    disabled=False
)

SelectionSlider

In [20]:
widgets.SelectionSlider(
    options=['scrambled', 'sunny side up', 'poached', 'over easy'],
    value='sunny side up',
    description='I like my eggs ...',
    disabled=False,
    continuous_update=False,
    orientation='horizontal',
    readout=True
)

SelectionRangeSlider

The value, index, and label keys are 2-tuples of the min and max values selected. The options must be nonempty.

In [21]:
import datetime
dates = [datetime.date(2015,i,1) for i in range(1,13)]
options = [(i.strftime('%b'), i) for i in dates]
widgets.SelectionRangeSlider(
    options=options,
    index=(0,11),
    description='Months (2015)',
    disabled=False
)

ToggleButtons

In [22]:
widgets.ToggleButtons(
    options=['Slow', 'Regular', 'Fast'],
    description='Speed:',
    disabled=False,
    button_style='', # 'success', 'info', 'warning', 'danger' or ''
    tooltips=['Description of slow', 'Description of regular', 'Description of fast'],
#     icons=['check'] * 3
)

SelectMultiple

Multiple values can be selected with shift and/or ctrl (or command) pressed and mouse clicks or arrow keys.

In [23]:
widgets.SelectMultiple(
    options=['Apples', 'Oranges', 'Pears'],
    value=['Oranges'],
    #rows=10,
    description='Fruits',
    disabled=False
)

String widgets

There are several widgets that can be used to display a string value. The Text and Textarea widgets accept input. The HTML and HTMLMath widgets display a string as HTML (HTMLMath also renders math). The Label widget can be used to construct a custom control label.

Text

In [24]:
widgets.Text(
    value='Hello World',
    placeholder='Type something',
    description='String:',
    disabled=False   
)

Textarea

In [25]:
widgets.Textarea(
    value='Hello World',
    placeholder='Type something',
    description='String:',
    disabled=False
)

Label

The Label widget is useful if you need to build a custom description next to a control using similar styling to the built-in control descriptions.

In [26]:
widgets.HBox([widgets.Label(value="The $m$ in $E=mc^2$:"), widgets.FloatSlider()])

HTML

In [27]:
widgets.HTML(
    value="Hello <b>World</b>",
    placeholder='Some HTML',
    description='Some HTML',
)

HTML Math

In [28]:
widgets.HTMLMath(
    value=r"Some math and <i>HTML</i>: \(x^2\) and $$\frac{x+1}{x-1}$$",
    placeholder='Some HTML',
    description='Some HTML',
)

Image

In [29]:
file = open("images/WidgetArch.png", "rb")
image = file.read()
widgets.Image(
    value=image,
    format='png',
    width=300,
    height=400,
)

Button

In [30]:
widgets.Button(
    description='Click me',
    disabled=False,
    button_style='', # 'success', 'info', 'warning', 'danger' or ''
    tooltip='Click me',
    icon='check'
)

Output

The Output widget can capture and display stdout, stderr and rich output generated by IPython. After the widget is created, direct output to it using a context manager.

In [31]:
out = widgets.Output()
out

You can print text to the output area as shown below.

In [32]:
with out:
    for i in range(10):
        print(i, 'Hello world!')

Rich material can also be directed to the output area. Anything which displays nicely in a Jupyter notebook will also display well in the Output widget.

In [33]:
from IPython.display import YouTubeVideo
with out:
    display(YouTubeVideo('eWzY2nGfkXk'))

Play (Animation) widget

The Play widget is useful to perform animations by iterating on a sequence of integers with a certain speed. The value of the slider below is linked to the player.

In [34]:
play = widgets.Play(
#     interval=10,
    value=50,
    min=0,
    max=100,
    step=1,
    description="Press play",
    disabled=False
)
slider = widgets.IntSlider()
widgets.jslink((play, 'value'), (slider, 'value'))
widgets.HBox([play, slider])

Date picker

The date picker widget works in Chrome and IE Edge, but does not currently work in Firefox or Safari because they do not support the HTML date input field.

In [35]:
widgets.DatePicker(
    description='Pick a Date',
    disabled=False
)

Color picker

In [36]:
widgets.ColorPicker(
    concise=False,
    description='Pick a color',
    value='blue',
    disabled=False
)

Controller

The Controller allows a game controller to be used as an input device.

In [37]:
widgets.Controller(
    index=0,
)

Container/Layout widgets

These widgets are used to hold other widgets, called children. Each has a children property that may be set either when the widget is created or later.

Box

In [38]:
items = [widgets.Label(str(i)) for i in range(4)]
widgets.Box(items)

HBox

In [39]:
items = [widgets.Label(str(i)) for i in range(4)]
widgets.HBox(items)

VBox

In [40]:
items = [widgets.Label(str(i)) for i in range(4)]
left_box = widgets.VBox([items[0], items[1]])
right_box = widgets.VBox([items[2], items[3]])
widgets.HBox([left_box, right_box])

Accordion

In [41]:
accordion = widgets.Accordion(children=[widgets.IntSlider(), widgets.Text()])
accordion.set_title(0, 'Slider')
accordion.set_title(1, 'Text')
accordion

Tabs

In this example the children are set after the tab is created. Titles for the tabes are set in the same way they are for Accordion.

In [42]:
tab_contents = ['P0', 'P1', 'P2', 'P3', 'P4']
children = [widgets.Text(description=name) for name in tab_contents]
tab = widgets.Tab()
tab.children = children
for i in range(len(children)):
    tab.set_title(i, str(i))
tab

Accordion and Tab use selected_index, not value

Unlike the rest of the widgets discussed earlier, the container widgets Accordion and Tab update their selected_index attribute when the user changes which accordion or tab is selected. That means that you can both see what the user is doing and programmatically set what the user sees by setting the value of selected_index.

Setting selected_index = None closes all of the accordions or deselects all tabs.

In the cells below try displaying or setting the selected_index of the tab and/or accordion.

In [43]:
tab.selected_index = 3
In [44]:
accordion.selected_index = None

Nesting tabs and accordions

Tabs and accordions can be nested as deeply as you want. If you have a few minutes, try nesting a few accordions or putting an accordion inside a tab or a tab inside an accordion.

The example below makes a couple of tabs with an accordion children in one of them

In [45]:
tab_nest = widgets.Tab()
tab_nest.children = [accordion, accordion]
tab_nest.set_title(0, 'An accordion')
tab_nest.set_title(1, 'Copy of the accordion')
tab_nest