前準備

pip install PyYAML

用意した実験用ymlファイル test.yml

AAA:
    aaa: 'aaa-aaa'
    bbb: 'bbb-bbb'
    ccc: 'ccc-ccc'
    ddd:
        - 'ddd-111'
        - 'ddd-222'
        - 'ddd-333'
    eee: 'eee-eee'

pythonコード

import yaml

with open('test.yml', 'r') as yml:
    yml_data = yaml.safe_load(yml)

print(yml_data)

'''
{'AAA': {'aaa': 'aaa-aaa',
         'bbb': 'bbb-bbb',
         'ccc': 'ccc-ccc',
         'ddd': ['ddd-111', 'ddd-222', 'ddd-333'],
         'eee': 'eee-eee'}}
'''