• PyYAML
• Quick example
• Tutorial
• pypi.org/project/PyYAML/

ติดตั้ง PyYAML

python -m pip install pyyaml

Example1

import yaml

dict1 = yaml.load("""
    name: Vorlin Laruknuzum
    sex: Male
    class: Priest
    title: Acolyte
    hp: [32, 71]
    sp: [1, 13]
    gold: 423
    inventory:
    - a Holy Book of Prayers (Words of Wisdom)
    - an Azure Potion of Cure Light Wounds
    - a Silver Wand of Wonder
    """)

print(type(dict1))
print(dict1)

ผลการรัน จะมี Warning ว่า deprecated

YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for full details.
  """)

<class 'dict'>
{'name': 'Vorlin Laruknuzum', 'sex': 'Male', 'class': 'Priest', 'title': 'Acolyte', 'hp': [32, 71], 'sp': [1, 13], 'gold': 423, 'inventory': ['a Holy Book of Prayers (Words of Wisdom)', 'an Azure Potion of Cure Light Wounds', 'a Silver Wand of Wonder']}

นำผลลัพธ์มาจัด format จะได้ประมาณนี้

{
    "name": "Vorlin Laruknuzum",
    "sex": "Male",
    "class": "Priest",
    "title": "Acolyte",
    "hp": [
        32,
        71
    ],
    "sp": [
        1,
        13
    ],
    "gold": 423,
    "inventory": [
        "a Holy Book of Prayers (Words of Wisdom)",
        "an Azure Potion of Cure Light Wounds",
        "a Silver Wand of Wonder"
    ]
}

Example2

import yaml

st1 = yaml.dump({'name': "The Cloak 'Colluin'", 'depth': 5, 'rarity': 45,'weight': 10, 'cost': 50000, 'flags': ['INT', 'WIS', 'SPEED', 'STEALTH']})
print(type(st1))
print(st1)

ผลการรัน

<class 'str'>
cost: 50000
depth: 5
flags:
- INT
- WIS
- SPEED
- STEALTH
name: The Cloak 'Colluin'
rarity: 45
weight: 10

Loading YAML

The function yaml.load converts a YAML document to a Python object.

import yaml

li1 = yaml.load("""
    - Hesperiidae
    - Papilionidae
    - Apatelodidae
    - Epiplemidae
    """)
print(type(li1))
print(li1)

YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for full details.
  """)

<class 'list'>
['Hesperiidae', 'Papilionidae', 'Apatelodidae', 'Epiplemidae']

yaml.load accepts a byte string, a Unicode string, an open binary file object, or an open text file object. A byte string or a file must be encoded with utf-8, utf-16-be or utf-16-le encoding. yaml.load detects the encoding by checking the BOM (byte order mark) sequence at the beginning of the string/file. If no BOM is present, the utf-8 encoding is assumed.

import yaml

dict1 = yaml.load("""
    hello: สวัสดี
    """)
print(type(dict1))
print(dict1)

<class 'dict'>
{'hello': 'สวัสดี'}

สามารถอ่านจากไฟล์ได้ โดยถ้าจะให้ภาษาไทยอ่านถูกต้องให้ระบุ encoding ให้ถูกด้วย

ใช้ safe_load() จะไม่มี Warning ว่า deprecated

import yaml

stream = open('document.yaml', 'r', encoding='utf-8')
dict1 = yaml.safe_load(stream)

print(type(dict1))
print(dict1)