#.........这里部分代码省略.........
    # prefix is going to have to be specific to the module, not the directory
    # that the xml was loaded from

    system = ModuleSystem(
        track_function=track_function,
        render_template=render_to_string,
        ajax_url=ajax_url,
        xqueue=xqueue,
        # TODO (cpennington): Figure out how to share info between systems
        filestore=descriptor.system.resources_fs,
        get_module=inner_get_module,
        user=user,
        # TODO (cpennington): This should be removed when all html from
        # a module is coming through get_html and is therefore covered
        # by the replace_static_urls code below
        replace_urls=partial(
            static_replace.replace_static_urls,
            data_directory=getattr(descriptor, "data_dir", None),
            course_id=course_id,
            static_asset_path=static_asset_path or descriptor.static_asset_path,
        ),
        replace_course_urls=partial(static_replace.replace_course_urls, course_id=course_id),
        replace_jump_to_id_urls=partial(
            static_replace.replace_jump_to_id_urls,
            course_id=course_id,
            jump_to_id_base_url=reverse("jump_to_id", kwargs={"course_id": course_id, "module_id": ""}),
        ),
        node_path=settings.NODE_PATH,
        xblock_field_data=xblock_field_data,
        publish=publish,
        anonymous_student_id=unique_id_for_user(user),
        course_id=course_id,
        open_ended_grading_interface=open_ended_grading_interface,
        s3_interface=s3_interface,
        cache=cache,
        can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
        # TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
        mixins=descriptor.system.mixologist._mixins,
    )

    # pass position specified in URL to module through ModuleSystem
    system.set("position", position)
    system.set("DEBUG", settings.DEBUG)
    if settings.MITX_FEATURES.get("ENABLE_PSYCHOMETRICS"):
        system.set(
            "psychometrics_handler",  # set callback for updating PsychometricsData
            make_psychometrics_data_update_handler(course_id, user, descriptor.location.url()),
        )

    try:
        module = descriptor.xmodule(system)
    except:
        log.exception("Error creating module from descriptor {0}".format(descriptor))

        # make an ErrorDescriptor -- assuming that the descriptor's system is ok
        if has_access(user, descriptor.location, "staff", course_id):
            err_descriptor_class = ErrorDescriptor
        else:
            err_descriptor_class = NonStaffErrorDescriptor

        err_descriptor = err_descriptor_class.from_descriptor(descriptor, error_msg=exc_info_to_str(sys.exc_info()))

        # Make an error module
        return err_descriptor.xmodule(system)

    system.set("user_is_staff", has_access(user, descriptor.location, "staff", course_id))
    _get_html = module.get_html

    if wrap_xmodule_display is True:
        _get_html = wrap_xmodule(module.get_html, module, "xmodule_display.html")

    module.get_html = replace_static_urls(
        _get_html,
        getattr(descriptor, "data_dir", None),
        course_id=course_id,
        static_asset_path=static_asset_path or descriptor.static_asset_path,
    )

    # Allow URLs of the form '/course/' refer to the root of multicourse directory
    #   hierarchy of this course
    module.get_html = replace_course_urls(module.get_html, course_id)

    # this will rewrite intra-courseware links
    # that use the shorthand /jump_to_id/<id>. This is very helpful
    # for studio authored courses (compared to the /course/... format) since it is
    # is durable with respect to moves and the author doesn't need to
    # know the hierarchy
    # NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
    # function, we just need to specify something to get the reverse() to work
    module.get_html = replace_jump_to_id_urls(
        module.get_html, course_id, reverse("jump_to_id", kwargs={"course_id": course_id, "module_id": ""})
    )

    if settings.MITX_FEATURES.get("DISPLAY_HISTOGRAMS_TO_STAFF"):
        if has_access(user, module, "staff", course_id):
            module.get_html = add_histogram(module.get_html, module, user)

    # force the module to save after rendering
    module.get_html = save_module(module.get_html, module)
    return module

#.........这里部分代码省略.........
    # These modules store data using the anonymous_student_id as a key.
    # To prevent loss of data, we will continue to provide old modules with
    # the per-student anonymized id (as we have in the past),
    # while giving selected modules a per-course anonymized id.
    # As we have the time to manually test more modules, we can add to the list
    # of modules that get the per-course anonymized id.
    is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
    module_class = getattr(descriptor, 'module_class', None)
    is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
    if is_pure_xblock or is_lti_module:
        anonymous_student_id = anonymous_id_for_user(user, course_id)
    else:
        anonymous_student_id = anonymous_id_for_user(user, None)

    field_data = LmsFieldData(descriptor._field_data, student_data)  # pylint: disable=protected-access

    user_is_staff = has_access(user, u'staff', descriptor.location, course_id)

    system = LmsModuleSystem(
        track_function=track_function,
        render_template=render_to_string,
        static_url=settings.STATIC_URL,
        xqueue=xqueue,
        # TODO (cpennington): Figure out how to share info between systems
        filestore=descriptor.runtime.resources_fs,
        get_module=inner_get_module,
        user=user,
        debug=settings.DEBUG,
        hostname=settings.SITE_NAME,
        # TODO (cpennington): This should be removed when all html from
        # a module is coming through get_html and is therefore covered
        # by the replace_static_urls code below
        replace_urls=partial(
            static_replace.replace_static_urls,
            data_directory=getattr(descriptor, 'data_dir', None),
            course_id=course_id,
            static_asset_path=static_asset_path or descriptor.static_asset_path,
        ),
        replace_course_urls=partial(
            static_replace.replace_course_urls,
            course_key=course_id
        ),
        replace_jump_to_id_urls=partial(
            static_replace.replace_jump_to_id_urls,
            course_id=course_id,
            jump_to_id_base_url=reverse('jump_to_id', kwargs={'course_id': course_id.to_deprecated_string(), 'module_id': ''})
        ),
        node_path=settings.NODE_PATH,
        publish=publish,
        anonymous_student_id=anonymous_student_id,
        course_id=course_id,
        open_ended_grading_interface=open_ended_grading_interface,
        s3_interface=s3_interface,
        cache=cache,
        can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
        get_python_lib_zip=(lambda: get_python_lib_zip(contentstore, course_id)),
        # TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
        mixins=descriptor.runtime.mixologist._mixins,  # pylint: disable=protected-access
        wrappers=block_wrappers,
        get_real_user=user_by_anonymous_id,
        services={
            'i18n': ModuleI18nService(),
            'fs': xblock.reference.plugins.FSService(),
            'field-data': field_data,
            'user': DjangoXBlockUserService(user, user_is_staff=user_is_staff),
        },
        get_user_role=lambda: get_user_role(user, course_id),
        descriptor_runtime=descriptor._runtime,  # pylint: disable=protected-access
        rebind_noauth_module_to_user=rebind_noauth_module_to_user,
        user_location=user_location,
        request_token=request_token,
    )

    # pass position specified in URL to module through ModuleSystem
    if position is not None:
        try:
            position = int(position)
        except (ValueError, TypeError):
            log.exception('Non-integer %r passed as position.', position)
            position = None

    system.set('position', position)
    if settings.FEATURES.get('ENABLE_PSYCHOMETRICS') and user.is_authenticated():
        system.set(
            'psychometrics_handler',  # set callback for updating PsychometricsData
            make_psychometrics_data_update_handler(course_id, user, descriptor.location)
        )

    system.set(u'user_is_staff', user_is_staff)
    system.set(u'user_is_admin', has_access(user, u'staff', 'global'))
    system.set(u'user_is_beta_tester', CourseBetaTesterRole(course_id).has_user(user))
    system.set(u'days_early_for_beta', getattr(descriptor, 'days_early_for_beta'))

    # make an ErrorDescriptor -- assuming that the descriptor's system is ok
    if has_access(user, u'staff', descriptor.location, course_id):
        system.error_descriptor_class = ErrorDescriptor
    else:
        system.error_descriptor_class = NonStaffErrorDescriptor

    return system, field_data

#.........这里部分代码省略.........
        student_module, created = StudentModule.objects.get_or_create(
            course_id=course_id,
            student=user,
            module_type=descriptor.location.category,
            module_state_key=descriptor.location.url(),
            defaults={'state': '{}'},
        )
        student_module.grade = event.get('value')
        student_module.max_grade = event.get('max_value')
        student_module.save()

        # Bin score into range and increment stats
        score_bucket = get_score_bucket(student_module.grade, student_module.max_grade)
        org, course_num, run = course_id.split("/")

        tags = ["org:{0}".format(org),
                "course:{0}".format(course_num),
                "run:{0}".format(run),
                "score_bucket:{0}".format(score_bucket)]

        if grade_bucket_type is not None:
            tags.append('type:%s' % grade_bucket_type)

        statsd.increment("lms.courseware.question_answered", tags=tags)

    # TODO (cpennington): When modules are shared between courses, the static
    # prefix is going to have to be specific to the module, not the directory
    # that the xml was loaded from
    system = ModuleSystem(track_function=track_function,
                          render_template=render_to_string,
                          ajax_url=ajax_url,
                          xqueue=xqueue,
                          # TODO (cpennington): Figure out how to share info between systems
                          filestore=descriptor.system.resources_fs,
                          get_module=inner_get_module,
                          user=user,
                          # TODO (cpennington): This should be removed when all html from
                          # a module is coming through get_html and is therefore covered
                          # by the replace_static_urls code below
                          replace_urls=partial(
                              static_replace.replace_static_urls,
                              data_directory=getattr(descriptor, 'data_dir', None),
                              course_namespace=descriptor.location._replace(category=None, name=None),
                          ),
                          node_path=settings.NODE_PATH,
                          xblock_model_data=xblock_model_data,
                          publish=publish,
                          anonymous_student_id=unique_id_for_user(user),
                          course_id=course_id,
                          open_ended_grading_interface=open_ended_grading_interface,
                          s3_interface=s3_interface,
                          cache=cache,
                          can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
                          )
    # pass position specified in URL to module through ModuleSystem
    system.set('position', position)
    system.set('DEBUG', settings.DEBUG)
    if settings.MITX_FEATURES.get('ENABLE_PSYCHOMETRICS'):
        system.set('psychometrics_handler',  # set callback for updating PsychometricsData
                   make_psychometrics_data_update_handler(course_id, user, descriptor.location.url()))

    try:
        module = descriptor.xmodule(system)
    except:
        log.exception("Error creating module from descriptor {0}".format(descriptor))

        # make an ErrorDescriptor -- assuming that the descriptor's system is ok
        if has_access(user, descriptor.location, 'staff', course_id):
            err_descriptor_class = ErrorDescriptor
        else:
            err_descriptor_class = NonStaffErrorDescriptor

        err_descriptor = err_descriptor_class.from_descriptor(
            descriptor,
            error_msg=exc_info_to_str(sys.exc_info())
        )

        # Make an error module
        return err_descriptor.xmodule(system)

    system.set('user_is_staff', has_access(user, descriptor.location, 'staff', course_id))
    _get_html = module.get_html

    if wrap_xmodule_display == True:
        _get_html = wrap_xmodule(module.get_html, module, 'xmodule_display.html')

    module.get_html = replace_static_urls(
        _get_html,
        getattr(descriptor, 'data_dir', None),
        course_namespace=module.location._replace(category=None, name=None))

    # Allow URLs of the form '/course/' refer to the root of multicourse directory
    #   hierarchy of this course
    module.get_html = replace_course_urls(module.get_html, course_id)

    if settings.MITX_FEATURES.get('DISPLAY_HISTOGRAMS_TO_STAFF'):
        if has_access(user, module, 'staff', course_id):
            module.get_html = add_histogram(module.get_html, module, user)

    return module

#.........这里部分代码省略.........
    block_wrappers.append(partial(replace_course_urls, course_id))

    # this will rewrite intra-courseware links (/jump_to_id/<id>). This format
    # is an improvement over the /course/... format for studio authored courses,
    # because it is agnostic to course-hierarchy.
    # NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
    # function, we just need to specify something to get the reverse() to work.
    block_wrappers.append(partial(
        replace_jump_to_id_urls,
        course_id,
        reverse('jump_to_id', kwargs={'course_id': course_id, 'module_id': ''}),
    ))

    if settings.FEATURES.get('DISPLAY_HISTOGRAMS_TO_STAFF'):
        if has_access(user, descriptor, 'staff', course_id):
            block_wrappers.append(partial(add_histogram, user))

    # These modules store data using the anonymous_student_id as a key.
    # To prevent loss of data, we will continue to provide old modules with
    # the per-student anonymized id (as we have in the past),
    # while giving selected modules a per-course anonymized id.
    # As we have the time to manually test more modules, we can add to the list
    # of modules that get the per-course anonymized id.
    is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
    module_class = getattr(descriptor, 'module_class', None)
    is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
    if is_pure_xblock or is_lti_module:
        anonymous_student_id = anonymous_id_for_user(user, course_id)
    else:
        anonymous_student_id = anonymous_id_for_user(user, '')

    system = LmsModuleSystem(
        track_function=track_function,
        render_template=render_to_string,
        static_url=settings.STATIC_URL,
        xqueue=xqueue,
        # TODO (cpennington): Figure out how to share info between systems
        filestore=descriptor.runtime.resources_fs,
        get_module=inner_get_module,
        user=user,
        debug=settings.DEBUG,
        hostname=settings.SITE_NAME,
        # TODO (cpennington): This should be removed when all html from
        # a module is coming through get_html and is therefore covered
        # by the replace_static_urls code below
        replace_urls=partial(
            static_replace.replace_static_urls,
            data_directory=getattr(descriptor, 'data_dir', None),
            course_id=course_id,
            static_asset_path=static_asset_path or descriptor.static_asset_path,
        ),
        replace_course_urls=partial(
            static_replace.replace_course_urls,
            course_id=course_id
        ),
        replace_jump_to_id_urls=partial(
            static_replace.replace_jump_to_id_urls,
            course_id=course_id,
            jump_to_id_base_url=reverse('jump_to_id', kwargs={'course_id': course_id, 'module_id': ''})
        ),
        node_path=settings.NODE_PATH,
        publish=publish,
        anonymous_student_id=anonymous_student_id,
        course_id=course_id,
        open_ended_grading_interface=open_ended_grading_interface,
        s3_interface=s3_interface,
        cache=cache,
        can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
        # TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
        mixins=descriptor.runtime.mixologist._mixins,  # pylint: disable=protected-access
        wrappers=block_wrappers,
        get_real_user=user_by_anonymous_id,
        services={
            # django.utils.translation implements the gettext.Translations
            # interface (it has ugettext, ungettext, etc), so we can use it
            # directly as the runtime i18n service.
            'i18n': django.utils.translation,
        },
        get_user_role=lambda: get_user_role(user, course_id),
    )

    # pass position specified in URL to module through ModuleSystem
    system.set('position', position)
    if settings.FEATURES.get('ENABLE_PSYCHOMETRICS'):
        system.set(
            'psychometrics_handler',  # set callback for updating PsychometricsData
            make_psychometrics_data_update_handler(course_id, user, descriptor.location.url())
        )

    system.set(u'user_is_staff', has_access(user, descriptor.location, u'staff', course_id))

    # make an ErrorDescriptor -- assuming that the descriptor's system is ok
    if has_access(user, descriptor.location, 'staff', course_id):
        system.error_descriptor_class = ErrorDescriptor
    else:
        system.error_descriptor_class = NonStaffErrorDescriptor

    descriptor.xmodule_runtime = system
    descriptor.scope_ids = descriptor.scope_ids._replace(user_id=user.id)
    return descriptor

#.........这里部分代码省略.........
    # Allow URLs of the form '/course/' refer to the root of multicourse directory
    #   hierarchy of this course
    block_wrappers.append(partial(replace_course_urls, course_id))

    # this will rewrite intra-courseware links (/jump_to_id/<id>). This format
    # is an improvement over the /course/... format for studio authored courses,
    # because it is agnostic to course-hierarchy.
    # NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
    # function, we just need to specify something to get the reverse() to work.
    block_wrappers.append(
        partial(
            replace_jump_to_id_urls,
            course_id,
            reverse("jump_to_id", kwargs={"course_id": course_id.to_deprecated_string(), "module_id": ""}),
        )
    )

    if settings.FEATURES.get("DISPLAY_DEBUG_INFO_TO_STAFF"):
        if has_access(user, "staff", descriptor, course_id):
            has_instructor_access = has_access(user, "instructor", descriptor, course_id)
            block_wrappers.append(partial(add_staff_markup, user, has_instructor_access))

    # These modules store data using the anonymous_student_id as a key.
    # To prevent loss of data, we will continue to provide old modules with
    # the per-student anonymized id (as we have in the past),
    # while giving selected modules a per-course anonymized id.
    # As we have the time to manually test more modules, we can add to the list
    # of modules that get the per-course anonymized id.
    is_pure_xblock = isinstance(descriptor, XBlock) and not isinstance(descriptor, XModuleDescriptor)
    module_class = getattr(descriptor, "module_class", None)
    is_lti_module = not is_pure_xblock and issubclass(module_class, LTIModule)
    if is_pure_xblock or is_lti_module:
        anonymous_student_id = anonymous_id_for_user(user, course_id)
    else:
        anonymous_student_id = anonymous_id_for_user(user, None)

    system = LmsModuleSystem(
        track_function=track_function,
        render_template=render_to_string,
        static_url=settings.STATIC_URL,
        xqueue=xqueue,
        # TODO (cpennington): Figure out how to share info between systems
        filestore=descriptor.runtime.resources_fs,
        get_module=inner_get_module,
        user=user,
        debug=settings.DEBUG,
        hostname=settings.SITE_NAME,
        # TODO (cpennington): This should be removed when all html from
        # a module is coming through get_html and is therefore covered
        # by the replace_static_urls code below
        replace_urls=partial(
            static_replace.replace_static_urls,
            data_directory=getattr(descriptor, "data_dir", None),
            course_id=course_id,
            static_asset_path=static_asset_path or descriptor.static_asset_path,
        ),
        replace_course_urls=partial(static_replace.replace_course_urls, course_key=course_id),
        replace_jump_to_id_urls=partial(
            static_replace.replace_jump_to_id_urls,
            course_id=course_id,
            jump_to_id_base_url=reverse(
                "jump_to_id", kwargs={"course_id": course_id.to_deprecated_string(), "module_id": ""}
            ),
        ),
        node_path=settings.NODE_PATH,
        publish=publish,
        anonymous_student_id=anonymous_student_id,
        course_id=course_id,
        open_ended_grading_interface=open_ended_grading_interface,
        s3_interface=s3_interface,
        cache=cache,
        can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
        # TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
        mixins=descriptor.runtime.mixologist._mixins,  # pylint: disable=protected-access
        wrappers=block_wrappers,
        get_real_user=user_by_anonymous_id,
        services={"i18n": ModuleI18nService()},
        get_user_role=lambda: get_user_role(user, course_id),
        descriptor_runtime=descriptor.runtime,
        rebind_noauth_module_to_user=rebind_noauth_module_to_user,
    )

    # pass position specified in URL to module through ModuleSystem
    system.set("position", position)
    if settings.FEATURES.get("ENABLE_PSYCHOMETRICS"):
        system.set(
            "psychometrics_handler",  # set callback for updating PsychometricsData
            make_psychometrics_data_update_handler(course_id, user, descriptor.location),
        )

    system.set(u"user_is_staff", has_access(user, u"staff", descriptor.location, course_id))
    system.set(u"user_is_admin", has_access(user, u"staff", "global"))

    # make an ErrorDescriptor -- assuming that the descriptor's system is ok
    if has_access(user, u"staff", descriptor.location, course_id):
        system.error_descriptor_class = ErrorDescriptor
    else:
        system.error_descriptor_class = NonStaffErrorDescriptor

    return system, student_data