Variable Explorer in Jupyter Notebook

Is there a variable explorer in Jupyter (IPython) like in Spyder? It is very uncomfortable having to print the list of variables all the time each time I run through the test code.

Has this feature been implemented yet? If so, how to enable it?

UPDATE

Scroll down to the section labeled update for a much less convoluted method.

OLD ANSWER

Here is a notebook on how to make your own Variable Inspector. I think it was written back when jupyter notebook was called ipython notebook but it works on the latest version.

I'll post the code below just in case the link breaks.

    import ipywidgets as widgets # Loads the Widget framework.
    from IPython.core.magics.namespace import NamespaceMagics # Used to query namespace.

    # For this example, hide these names, just to avoid polluting the namespace further
    get_ipython().user_ns_hidden['widgets'] = widgets
    get_ipython().user_ns_hidden['NamespaceMagics'] = NamespaceMagics

    class VariableInspectorWindow(object):
        instance = None

    def __init__(self, ipython):
        """Public constructor."""
        if VariableInspectorWindow.instance is not None:
            raise Exception("""Only one instance of the Variable Inspector can exist at a 
                time.  Call close() on the active instance before creating a new instance.
                If you have lost the handle to the active instance, you can re-obtain it
                via `VariableInspectorWindow.instance`.""")

        VariableInspectorWindow.instance = self
        self.closed = False
        self.namespace = NamespaceMagics()
        self.namespace.shell = ipython.kernel.shell

        self._box = widgets.Box()
        self._box._dom_classes = ['inspector']
        self._box.background_color = '#fff'
        self._box.border_color = '#ccc'
        self._box.border_width = 1
        self._box.border_radius = 5

        self._modal_body = widgets.VBox()
        self._modal_body.overflow_y = 'scroll'

        self._modal_body_label = widgets.HTML(value = 'Not hooked')
        self._modal_body.children = [self._modal_body_label]

        self._box.children = [
            self._modal_body, 
        ]

        self._ipython = ipython
        self._ipython.events.register('post_run_cell', self._fill)

    def close(self):
        """Close and remove hooks."""
        if not self.closed:
            self._ipython.events.unregister('post_run_cell', self._fill)
            self._box.close()
            self.closed = True
            VariableInspectorWindow.instance = None

    def _fill(self):
        """Fill self with variable information."""
        values = self.namespace.who_ls()
        self._modal_body_label.value = '<table class="table table-bordered table-striped"><tr><th>Name</th><th>Type</th><th>Value</th></tr><tr><td>' + \
            '</td></tr><tr><td>'.join(['{0}</td><td>{1}</td><td>{2}'.format(v, type(eval(v)).__name__, str(eval(v))) for v in values]) + \
            '</td></tr></table>'

    def _ipython_display_(self):
        """Called when display() or pyout is used to display the Variable 
        Inspector."""
        self._box._ipython_display_()

Run inline with the following:

    inspector = VariableInspectorWindow(get_ipython())
    inspector

Make it a javascript pop out;

    %%javascript
    $('div.inspector')
        .detach()
        .prependTo($('body'))
        .css({
            'z-index': 999, 
            position: 'fixed',
            'box-shadow': '5px 5px 12px -3px black',
            opacity: 0.9
        })
        .draggable();

UPDATE

Date: May 17 2017

@jfbercher created a nbextension variable inspector. The source code can be seen here jupyter_contrib_nbextensions. For more information see the docs.

Install

User

    pip install jupyter_contrib_nbextensions
    jupyter contrib nbextension install --user

Virtual environment

    pip install jupyter_contrib_nbextensions
    jupyter contrib nbextension install --sys-prefix

Enable

    jupyter nbextension enable varInspector/main

Here's a screen-shot;

enter image description here

From: stackoverflow.com/q/37718907