<div class="form-group col-md-6">
            <label for="id_nome">Banco</label>
            <div class="input-group">
                {{ form.banco }}
                 <button type="button" class="btn btn-outline-secondary" data-toggle="modal" data-target="#formBancoModal">+</button>
            </div>
            <div class="invalid-feedback">
                Campo obrigatório
            </div>
            <!-- MODAL BANCO -->
            <div class="modal fade" id="formBancoModal" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true">
                <div class="modal-dialog modal-dialog-centered modal-lg" role="document">
                    <div class="modal-content">
                        <div class="modal-header">
                            <h5 class="modal-title" id="myLargeModalLabel">Adicionar Banco</h5>
                            <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                                <span aria-hidden="true">&times;</span>
                            </button>
                        </div>
                        <div class="modal-body">
                            <form method="POST" id="form-banco">
                                {% csrf_token %}
                                {{ form_banco.as_table }}
                            </form>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-primary" id="btn-gravar-banco">Gravar</button>
                            <button type="button" class="btn btn-secondary" data-dismiss="modal">Fechar</button>
                        </div>
                    </div>
                </div>
            </div>
        </div>