yaml 拼接字符串

yaml 1.2

python中添加自定义constructor

# 使用 yaml 1.2
from ruamel.yaml import YAML
yaml = YAML()
## define custom tag handler
def join(loader, node):
    seq = loader.construct_sequence(node)
    return ''.join([str(i) for i in seq])

## register the tag handler
yaml.constructor.add_constructor('!join', join)

yaml格式

a: *anchor something
b: !join ['We get ', *anchor]

python读取

with open('config.yaml', 'r', encoding='utf-8') as f:
    config = yaml.load(f)
print(config['b'])
# 可以看到拼接好的字符串为：'We get something'