ContextManagerMagic

class penzai.treescope.treescope_ipython.ContextManagerMagic

Bases: Magics

Magics class for using %%with to run a cell under a context manager.

Inherited Attributes

config	A trait whose value must be an instance of a specified class.
cross_validation_lock	A contextmanager for running a block with our cross validation lock set to True.
options_table
parent	A trait whose value must be an instance of a specified class.
shell

Methods

with_(line, cell)

%%with cell magic: runs under a context manager.

Attributes

config	A trait whose value must be an instance of a specified class.
cross_validation_lock	A contextmanager for running a block with our cross validation lock set to True.
magics
options_table
parent	A trait whose value must be an instance of a specified class.
registered
shell

Inherited Methods

(expand to view inherited methods)

__init__([shell])
add_traits(**traits)	Dynamically add trait attributes to the HasTraits instance.
arg_err(func)	Print docstring if incorrect arguments were passed
class_config_rst_doc()	Generate rST documentation for this class' config options.
class_config_section([classes])	Get the config section for this class.
class_get_help([inst])	Get the help string for this class in ReST format.
class_get_trait_help(trait[, inst, helptext])	Get the helptext string for a single trait.
class_own_trait_events(name)	Get a dict of all event handlers defined on this class, not a parent.
class_own_traits(**metadata)	Get a dict of all the traitlets defined on this class, not a parent.
class_print_help([inst])	Get the help string for a single trait and print it.
class_trait_names(**metadata)	Get a list of all the names of this class' traits.
class_traits(**metadata)	Get a dict of all the traits of this class.
default_option(fn, optstr)	Make an entry in the options_table for fn, with value optstr
format_latex(strng)	Format a string for latex inclusion.
has_trait(name)	Returns True if the object has a trait with the specified name.
hold_trait_notifications()	Context manager for bundling trait change notifications and cross validation.
notify_change(change)	Notify observers of a change event
observe(handler[, names, type])	Setup a handler to be called when a trait changes.
on_trait_change([handler, name, remove])	DEPRECATED: Setup a handler to be called when a trait changes.
parse_options(arg_str, opt_str, *long_opts, **kw)	Parse options passed to an argument string.
section_names()	return section names as a list
set_trait(name, value)	Forcibly sets trait attribute, including read-only attributes.
setup_instance(**kwargs)
trait_defaults(*names, **metadata)	Return a trait's default value or a dictionary of them
trait_events([name])	Get a dict of all the event handlers of this class.
trait_has_value(name)	Returns True if the specified trait has a value.
trait_metadata(traitname, key[, default])	Get metadata values for trait by key.
trait_names(**metadata)	Get a list of all the names of this class' traits.
trait_values(**metadata)	A dict of trait names and their values.
traits(**metadata)	Get a dict of all the traits of this class.
unobserve(handler[, names, type])	Remove a trait change handler.
unobserve_all([name])	Remove trait change handlers of any type for the specified name.
update_config(config)	Update config and load the new values

with_(line, cell)

%%with cell magic: runs under a context manager.

The %%with magic is syntactic sugar for running a cell under a context manager. It can be used to easily set Penzai’s context variables in a cell without having to explicitly display the final output. In other words,

%%with some_var.set_scoped(Foo)
result = ...
result

expands to something like

with some_var.set_scoped(Foo):
  result = ...
  IPython.display.display(result)

Parameters:

• line – Contents of the line where %%with is. Should be a Python expression for a context manager.

• cell – Contents of the rest of the cell. Will be run inside the context manager scope.