Understanding the flexibility of using conanfile.py vs conanfile.txt section obsolete

I am reading the docs version 2.0 and see that examples2 repository do not match what tutorial docs says about `examples2/tutorial/consuming_packages/conanfile_py`. Is it outdated?
Actual folder looks like this:
```
.
├── CMakeLists.txt
├── complete_CMakeLists.txt
├── complete_conanfile.py
├── conanfile.py
├── run_example.py
└── src
├── complete_main.c
└── main.c

1 directory, 7 files
```