gistfile1.txt

$ cat somefile.yaml
options:
  preferences:
    delay: 1
    use_mouse: 1
    async: 0
$ cat temp.py
import pprint
import yaml

with open("somefile.yaml", "rb") as f:
    pprint.pprint(yaml.load(f.read()))
$ (workon temp && python temp.py)
{'options': {'preferences': {'async': 0, 'delay': 1, 'use_mouse': 1}}}