Variable Inspector.ipynb
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Build the Variable Inspector¶
In [1]:
from IPython.html import widgets
from IPython.display import display
import re
Create Variable Inspector Controls¶
In [2]:
_popout = widgets.ContainerWidget(default_view_name="ModalView")
_popout.description = "Variable Inspector"
_popout.button_text = _popout.description
_popout.vbox()
_modal_header_execs_label = widgets.StringWidget(parent=_popout, default_view_name="LabelView")
_modal_header_execs_label.execs = 0
_modal_body = widgets.ContainerWidget(parent=_popout)
_modal_body.flex1()
_modal_body.set_css('overflow-y', 'scroll')
_modal_body_label = widgets.StringWidget(parent=_modal_body, default_view_name="LabelView")
_modal_body_label.value = 'Not hooked'
_modal_footer = widgets.ContainerWidget(parent=_popout)
_var_filter = widgets.SelectionWidget(values=['Public', 'Private', 'IPython'], parent=_modal_footer, value='Public', default_view_name='ToggleButtonsView')
display(_popout)
_modal_footer.add_class('modal-footer')
Method that Fills the Inspector¶
In [3]:
_ipython_input = re.compile('_i[0-9]*')
def _fill_inspector():
# Apply filter to variable names.
names = []
for name in sorted(_ipython.user_ns):
match = _ipython_input.match(name)
is_ipython = (match is not None and match.group() == name) or \
name == '_dh' or \
name == '_ih' or \
name == '_ii' or \
name == '_iii' or \
name == '_oh' or \
name == '_sh' or \
name == 'get_ipython' or \
name == 'In' or \
name == 'Out' or \
name == 'exit' or \
name == 'help' or \
name == 'quit' or \
name == '_' or \
name == '__' or \
name == '___'
is_private = name.startswith('_')
is_public = not is_private
var_filter = _var_filter.value
if var_filter == 'IPython' and is_ipython:
names.append(name)
elif var_filter == 'Private' and (is_private and not is_ipython):
names.append(name)
elif var_filter == 'Public' and (is_public and not is_ipython):
names.append(name)
# Render each name and it's value.
variable_list_html = """
<table class="table table-bordered table-striped" style="width: 100%; overflow: hidden; table-layout:fixed;">
<tr><th>Name</th><th>Type</th><th>Value</th>"""
for name in names:
var_value = _ipython.user_ns[name]
var_type = type(var_value)
var_small_value = str(var_value)[:100].replace("&", "&").replace("<", "<")
if str(var_value) != var_small_value:
var_small_value += '<br><div class="label label-info">...</div>'
row = """
<tr style='overflow: hidden;'>
<td style='width: 30%; overflow: hidden;'>{name}</td>
<td style='width: 30%; overflow: hidden;'>{type}</td>
<td style='width: 40%; overflow: hidden;'>{small_value}</td>
</tr>
""".format(name=name, type=var_type.__name__, small_value=var_small_value, value=str(var_value))
variable_list_html += row + '\n'
variable_list_html += '</table>'
_modal_body_label.value = variable_list_html
Hook Cell Execute and Filter Change¶
In [4]:
_ipython = get_ipython()
try:
del _ipython._post_execute[handle_cell_executed]
except:
pass
def _handle_cell_executed():
_modal_header_execs_label.execs += 1
_modal_header_execs_label.value = '%d cell executions captured' % _modal_header_execs_label.execs
_fill_inspector()
_ipython.register_post_execute(_handle_cell_executed)
def _handle_filter_changed():
_fill_inspector()
_var_filter.on_trait_change(_handle_filter_changed, 'value')
Test¶
In [5]:
a = 5
In [6]:
b = 3.0
In [7]:
c = a * b
In [8]:
d = "String"
In [9]:
del b