As much as I enjoy building on ASP.NET MVC, it's time to move off Windows.

I'd like to switch to something Python-based with the least amount of pain.

Without discussing the merits of or reasons for switching, which Python web framework is most similar to ASP.NET MVC 3 in terms of architecture?

Architectural Examples

I'm talking about the flow, not the language.

Typical .NET Route

routes.MapRoute( // maps requests at /Product/ to ProductController
    "Products", // Route name
    "Product/{action}/{id}", // URL with parameters
    new { controller = "Product", action = "Index", id = UrlParameter.Optional }
        // Parameter defaults
);

Typical .NET controller

public class ProductController
{
    public ActionResult Index(IndexInputModel inputModel)
    {
        // do something with inputModel ...
        var viewModel = new ProductIndexViewModel()
        {
            Products = productList;
        }
        return View("~/Views/Product/Index.cshtml", viewModel);
    }
    // ...
}

Typical ~/Views/Product/Index.cshtml .NET Razor View

@model ProductIndexViewModel

<h2>Products</h2>
@foreach (var product in Model.Products)
{
    <h3>@product.Title</h3>
    <p>@product.Description</p>
    <span class="price">@product.Price</span>
}