Examples don't work

I'm trying to get started with Python workers, but the fact that the example doesn't work is not very encouraging:

```
23:06:53 $ wrangler generate my-python-project https://github.com/cloudflare/python-worker-hello-world

✘ [ERROR] Deprecation:

`wrangler generate` has been deprecated.
Try running `wrangler init` to generate a basic Worker, or cloning the template repository
instead:

git clone https://github.com/cloudflare/python-worker-hello-world

Please refer to https://developers.cloudflare.com/workers/wrangler/deprecations/#generate for more
information.

If you think this is a bug then please create an issue at https://github.com/cloudflare/wrangler2/issues/new/choose

stavros@zeus:/tmp
23:06:54 $ git clone https://github.com/cloudflare/python-worker-hello-world
Cloning into 'python-worker-hello-world'...
Resolving deltas: 100% (39/39), done.

stavros@zeus:/tmp
23:07:03 $ cd python-worker-hello-world/

stavros@zeus:/t/python-worker-hello-world (master|✔)
23:07:10 $ wrangler publish
⛅️ wrangler 2.0.12
--------------------
▲ [WARNING] Processing wrangler.toml configuration:

- 😶 Ignored: "type":
Most common features now work out of the box with wrangler, including modules, jsx,
typescript, etc. If you need anything more, use a custom build.
- 😶 Ignored: "webpack_config":
Most common features now work out of the box with wrangler, including modules, jsx,
typescript, etc. If you need anything more, use a custom build.
- Deprecation: "zone_id":
This is unnecessary since we can deduce this from routes directly.

✘ [ERROR] Processing wrangler.toml configuration:

- Expected "route" to be either a string, or an object with shape { pattern, custom_domain,
zone_id | zone_name }, but got "".

If you think this is a bug then please create an issue at https://github.com/cloudflare/wrangler2/issues/new/choose
```