pyyaml¶

YAML parser and emitter for Python

install¶

install from pypi:

$ pip install pyyaml

usage¶

import:

import yaml

class YAMLObject:

YAMLObject

# methods:
from_yaml(cls, loader, node)
to_yaml(cls, dumper, data)

class YAMLError:

YAMLError

functions:

add_constructor(tag, constructor, Loader=<class 'yaml.loader.Loader'>)

# 序列化python对象到yaml文件
dump(data, stream=None, Dumper=<class 'yaml.dumper.Dumper'>, **kwds)
# dump(data, open(file, 'w')),　序列化python对象data到stream,一般是一个文件，如果stream=None, 返回生成的字符串．
safe_dump(data, stream=None, **kwds) # 序列化最基本的tag.
dump_all(documents, stream=None, Dumper=<class 'yaml.dumper.Dumper'>,
default_style=None, default_flow_style=None, canonical=None, indent=None, width=None,
allow_unicode=None, line_break=None, encoding='utf-8', explicit_start=None,
explicit_end=None, version=None, tags=None)

# 从yaml文件解析出python对象
load(stream, Loader=<class 'yaml.loader.Loader'>)
# data = load(open(file, 'r')), 从stream中解析第一个yaml文档, 返回一个dict。
safe_load(stream) # 解析最基本的tag，返回一个dict。
load_all(stream, Loader=<class 'yaml.loader.Loader'>) # 返回一个generator.