Erm what? It's very very obviously based on Python. The docs even explicitly say that. This is the example they give:

  def fizz_buzz(n):
    """Print Fizz Buzz numbers from 1 to n."""
    for i in range(1, n + 1):
      s = ""
      if i % 3 == 0:
        s += "Fizz"
      if i % 5 == 0:
        s += "Buzz"
      print(s if s else i)

  fizz_buzz(20)

Does that look like YAML or TOML?