def is_instance(inst, not_instance_msg="FMT:Is it a {inst.__name__}?", name=None, state=None):
rep = Reporter.active_reporter
sol_name = name or state.solution_parts.get('name')
stu_name = name or state.student_parts.get('name')
if not isInstanceInProcess(sol_name, inst, state.solution_process):
raise ValueError("%r is not a %s in the solution environment" % (sol_name, type(inst)))
_msg = state.build_message(not_instance_msg, {'inst': inst})
feedback = Feedback(_msg, state.highlight)
rep.do_test(InstanceProcessTest(stu_name, inst, state.student_process, feedback))
return state
def is_instance(inst, not_instance_msg=None, state=None):
"""Check whether an object is an instance of a certain class.
``is_instance()`` can currently only be used when chained from ``check_object()``, the function that is
used to 'zoom in' on the object of interest.
Args:
inst (class): The class that the object should have.
not_instance_msg (str): When specified, this overrides the automatically generated message in case
the object does not have the expected class.
state (State): The state that is passed in through the SCT chain (don't specify this).
:Example:
Student code and solution code::
import numpy as np
arr = np.array([1, 2, 3, 4, 5])
SCT::
# Verify the class of arr
import numpy
Ex().check_object('arr').is_instance(numpy.ndarray)
"""
state.assert_is(['object_assignments'], 'is_instance', ['check_object'])
rep = Reporter.active_reporter
sol_name = state.solution_parts.get('name')
stu_name = state.student_parts.get('name')
if not_instance_msg is None:
not_instance_msg = "Is it a {{inst.__name__}}?"
if not isInstanceInProcess(sol_name, inst, state.solution_process):
raise InstructorError(
"`is_instance()` noticed that `%s` is not a `%s` in the solution process."
% (sol_name, inst.__name__))
_msg = state.build_message(not_instance_msg, {'inst': inst})
feedback = Feedback(_msg, state)
rep.do_test(
InstanceProcessTest(stu_name, inst, state.student_process, feedback))
return state
def is_instance(inst,
not_instance_msg="FMT:Is it a {inst.__name__}?",
name=None,
state=None):
rep = Reporter.active_reporter
sol_name = name or state.solution_parts.get('name')
stu_name = name or state.student_parts.get('name')
if not isInstanceInProcess(sol_name, inst, state.solution_process):
raise ValueError("%r is not a %s in the solution environment" %
(sol_name, type(inst)))
_msg = state.build_message(not_instance_msg, {'inst': inst})
feedback = Feedback(_msg, state.highlight)
rep.do_test(
InstanceProcessTest(stu_name, inst, state.student_process, feedback))
return state