def has_key(key, key_missing_msg=MSG_KEY_MISSING, 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 isDefinedCollInProcess(sol_name, key, state.solution_process):
raise NameError("Not all keys you specified are actually keys in %s in the solution process" % sol_name)
# check if key available
_msg = state.build_message(key_missing_msg, {'key': key})
rep.do_test(DefinedCollProcessTest(stu_name, key, state.student_process,
Feedback(_msg, state.highlight)))
return state
def has_key(key, key_missing_msg=MSG_KEY_MISSING, 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 isDefinedCollInProcess(sol_name, key, state.solution_process):
raise NameError(
"Not all keys you specified are actually keys in %s in the solution process"
% sol_name)
# check if key available
_msg = state.build_message(key_missing_msg, {'key': key})
rep.do_test(
DefinedCollProcessTest(stu_name, key, state.student_process,
Feedback(_msg, state.highlight)))
return state
def has_key(key, key_missing_msg=MSG_KEY_MISSING, state=None):
"""Check whether an object (dict, DataFrame, etc) has a key.
``has_key()`` can currently only be used when chained from ``check_object()``, the function that is
used to 'zoom in' on the object of interest.
Args:
key (str): Name of the key that the object should have.
key_missing_msg (str): When specified, this overrides the automatically generated
message in case the key does not exist.
state (State): The state that is passed in through the SCT chain (don't specify this).
:Example:
Student code and solution code::
x = {'a': 2}
SCT::
# Verify that x contains a key a
Ex().check_object('x').has_key('a')
"""
rep = Reporter.active_reporter
sol_name = state.solution_parts.get('name')
stu_name = state.student_parts.get('name')
if not isDefinedCollInProcess(sol_name, key, state.solution_process):
raise NameError(
"Not all keys you specified are actually keys in %s in the solution process"
% sol_name)
# check if key available
_msg = state.build_message(key_missing_msg, {'key': key})
rep.do_test(
DefinedCollProcessTest(stu_name, key, state.student_process,
Feedback(_msg, state)))
return state
def check_keys(key, missing_msg=None, expand_msg=None, state=None):
"""Check whether an object (dict, DataFrame, etc) has a key.
``check_keys()`` can currently only be used when chained from ``check_object()``, the function that is
used to 'zoom in' on the object of interest.
Args:
key (str): Name of the key that the object should have.
missing_msg (str): When specified, this overrides the automatically generated
message in case the key does not exist.
expand_msg (str): If specified, this overrides any messages that are prepended by previous SCT chains.
state (State): The state that is passed in through the SCT chain (don't specify this).
:Example:
Student code and solution code::
x = {'a': 2}
SCT::
# Verify that x contains a key a
Ex().check_object('x').check_keys('a')
# Verify that x contains a key a and a is correct.
Ex().check_object('x').check_keys('a').has_equal_value()
"""
state.assert_is(['object_assignments'], 'is_instance',
['check_object', 'check_df'])
if missing_msg is None:
missing_msg = "There is no {{ 'column' if 'DataFrame' in parent.typestr else 'key' }} `'{{key}}'`."
if expand_msg is None:
expand_msg = "Did you correctly set the {{ 'column' if 'DataFrame' in parent.typestr else 'key' }} `'{{key}}'`? "
rep = Reporter.active_reporter
sol_name = state.solution_parts.get('name')
stu_name = state.student_parts.get('name')
if not isDefinedCollInProcess(sol_name, key, state.solution_process):
raise InstructorError(
"`check_keys()` couldn't find key `%s` in object `%s` in the solution process."
% (key, sol_name))
# check if key available
_msg = state.build_message(missing_msg, {'key': key})
rep.do_test(
DefinedCollProcessTest(stu_name, key, state.student_process,
Feedback(_msg, state)))
def get_part(name, key, highlight):
if isinstance(key, str):
slice_val = ast.Str(s=key)
else:
slice_val = ast.parse(str(key)).body[0].value
expr = ast.Subscript(value=ast.Name(id=name, ctx=ast.Load()),
slice=ast.Index(value=slice_val),
ctx=ast.Load())
ast.fix_missing_locations(expr)
return {'node': expr, 'highlight': highlight}
stu_part = get_part(stu_name, key, state.student_parts.get('highlight'))
sol_part = get_part(sol_name, key, state.solution_parts.get('highlight'))
append_message = {'msg': expand_msg, 'kwargs': {'key': key}}
child = part_to_child(stu_part, sol_part, append_message, state)
return child