. . .
from django.shortcuts import render, redirect
from django.contrib import messages
from .forms import PeliculaForm
. . .
def anadir_pelicula(request):
    if request.method == 'POST':
        form = PeliculaForm(request.POST, request.FILES)
        if form.is_valid():
            pelicula = Pelicula()
            pelicula.titulo = form.cleaned_data['titulo']
            pelicula.director = form.cleaned_data['director']
            pelicula.genero = form.cleaned_data['genero']
            pelicula.save()
        else:
            return render(request, 'mispeliculas/nueva_pelicula.html', {'form':form})

        return redirect('nueva_pelicula')

. . .