How to use the ramp-frontend.ramp_frontend.forms.CodeForm function in ramp-frontend

#     delattr(CodeForm, name)
    CodeForm.names_codes = []

    # Then we create named fields in the CodeForm class for each editable
    # submission file. They have to be populated when the code_form object
    # is created, so we also create a code_form_kwargs dictionary and
    # populate it with the codes.
    code_form_kwargs = {}
    for submission_file in sandbox_submission.files:
        if submission_file.is_editable:
            f_field = submission_file.name
            setattr(CodeForm,
                    f_field, StringField('Text', widget=TextArea()))
            code_form_kwargs[f_field] = submission_file.get_code()
    code_form_kwargs['prefix'] = 'code'
    code_form = CodeForm(**code_form_kwargs)
    # Then, to be able to iterate over the files in the sandbox.html
    # template, we also fill a separate table of pairs (file name, code).
    # The text areas in the template will then have to be created manually.
    for submission_file in sandbox_submission.files:
        if submission_file.is_editable:
            code_form.names_codes.append(
                (submission_file.name, submission_file.get_code()))

    # initialize the submission field and the the uploading form
    submit_form = SubmitForm(
        submission_name=event_team.last_submission_name, prefix='submit'
    )
    upload_form = UploadForm(prefix='upload')

    admin = is_admin(db.session, event_name, flask_login.current_user.name)
    if request.method == 'GET':

# First we need to make sure CodeForm is empty
    # for name_code in CodeForm.names_codes:
    #     name, _ = name_code
    #     delattr(CodeForm, name)
    CodeForm.names_codes = []

    # Then we create named fields in the CodeForm class for each editable
    # submission file. They have to be populated when the code_form object
    # is created, so we also create a code_form_kwargs dictionary and
    # populate it with the codes.
    code_form_kwargs = {}
    for submission_file in sandbox_submission.files:
        if submission_file.is_editable:
            f_field = submission_file.name
            setattr(CodeForm,
                    f_field, StringField('Text', widget=TextArea()))
            code_form_kwargs[f_field] = submission_file.get_code()
    code_form_kwargs['prefix'] = 'code'
    code_form = CodeForm(**code_form_kwargs)
    # Then, to be able to iterate over the files in the sandbox.html
    # template, we also fill a separate table of pairs (file name, code).
    # The text areas in the template will then have to be created manually.
    for submission_file in sandbox_submission.files:
        if submission_file.is_editable:
            code_form.names_codes.append(
                (submission_file.name, submission_file.get_code()))

    # initialize the submission field and the the uploading form
    submit_form = SubmitForm(
        submission_name=event_team.last_submission_name, prefix='submit'
    )