netdata/python.d/python_modules/pyyaml2/__init__.py at master · jamesblunt/netdata · GitHub

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from error import *

from tokens import *

from events import *

from nodes import *

from loader import *

from dumper import *

__version__ = '3.11'

try:

from cyaml import *

__with_libyaml__ = True

except ImportError:

__with_libyaml__ = False

def scan(stream, Loader=Loader):

"""

Scan a YAML stream and produce scanning tokens.

"""

loader = Loader(stream)

try:

while loader.check_token():

yield loader.get_token()

finally:

loader.dispose()

def parse(stream, Loader=Loader):

"""

Parse a YAML stream and produce parsing events.

"""

loader = Loader(stream)

try:

while loader.check_event():

yield loader.get_event()

finally:

loader.dispose()

def compose(stream, Loader=Loader):

"""

Parse the first YAML document in a stream

and produce the corresponding representation tree.

"""

loader = Loader(stream)

try:

return loader.get_single_node()

finally:

loader.dispose()

def compose_all(stream, Loader=Loader):

"""

Parse all YAML documents in a stream

and produce corresponding representation trees.

"""

loader = Loader(stream)

try:

while loader.check_node():

yield loader.get_node()

finally:

loader.dispose()

def load(stream, Loader=Loader):

"""

Parse the first YAML document in a stream

and produce the corresponding Python object.

"""

loader = Loader(stream)

try:

return loader.get_single_data()

finally:

loader.dispose()

def load_all(stream, Loader=Loader):

"""

Parse all YAML documents in a stream

and produce corresponding Python objects.

"""

loader = Loader(stream)

try:

while loader.check_data():

yield loader.get_data()

finally:

loader.dispose()

def safe_load(stream):

"""

Parse the first YAML document in a stream

and produce the corresponding Python object.

Resolve only basic YAML tags.

"""

return load(stream, SafeLoader)

def safe_load_all(stream):

"""

Parse all YAML documents in a stream

and produce corresponding Python objects.

Resolve only basic YAML tags.

"""

return load_all(stream, SafeLoader)

def emit(events, stream=None, Dumper=Dumper,

canonical=None, indent=None, width=None,

allow_unicode=None, line_break=None):

"""

Emit YAML parsing events into a stream.

If stream is None, return the produced string instead.

"""

getvalue = None

if stream is None:

from StringIO import StringIO

stream = StringIO()

getvalue = stream.getvalue

dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,

allow_unicode=allow_unicode, line_break=line_break)

try:

for event in events:

dumper.emit(event)

finally:

dumper.dispose()

if getvalue:

return getvalue()

def serialize_all(nodes, stream=None, Dumper=Dumper,

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):

"""

Serialize a sequence of representation trees into a YAML stream.

If stream is None, return the produced string instead.

"""

getvalue = None

if stream is None:

if encoding is None:

from StringIO import StringIO

else:

from cStringIO import StringIO

stream = StringIO()

getvalue = stream.getvalue

dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,

allow_unicode=allow_unicode, line_break=line_break,

encoding=encoding, version=version, tags=tags,

explicit_start=explicit_start, explicit_end=explicit_end)

try:

dumper.open()

for node in nodes:

dumper.serialize(node)

dumper.close()

finally:

dumper.dispose()

if getvalue:

return getvalue()

def serialize(node, stream=None, Dumper=Dumper, **kwds):

"""

Serialize a representation tree into a YAML stream.

If stream is None, return the produced string instead.

"""

return serialize_all([node], stream, Dumper=Dumper, **kwds)

def dump_all(documents, stream=None, 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):

"""

Serialize a sequence of Python objects into a YAML stream.

If stream is None, return the produced string instead.

"""

getvalue = None

if stream is None:

if encoding is None:

from StringIO import StringIO

else:

from cStringIO import StringIO

stream = StringIO()

getvalue = stream.getvalue

dumper = Dumper(stream, default_style=default_style,

default_flow_style=default_flow_style,

canonical=canonical, indent=indent, width=width,

allow_unicode=allow_unicode, line_break=line_break,

encoding=encoding, version=version, tags=tags,

explicit_start=explicit_start, explicit_end=explicit_end)

try:

dumper.open()

for data in documents:

dumper.represent(data)

dumper.close()

finally:

dumper.dispose()

if getvalue:

return getvalue()

def dump(data, stream=None, Dumper=Dumper, **kwds):

"""

Serialize a Python object into a YAML stream.

If stream is None, return the produced string instead.

"""

return dump_all([data], stream, Dumper=Dumper, **kwds)

def safe_dump_all(documents, stream=None, **kwds):

"""

Serialize a sequence of Python objects into a YAML stream.

Produce only basic YAML tags.

If stream is None, return the produced string instead.

"""

return dump_all(documents, stream, Dumper=SafeDumper, **kwds)

def safe_dump(data, stream=None, **kwds):

"""

Serialize a Python object into a YAML stream.

Produce only basic YAML tags.

If stream is None, return the produced string instead.

"""

return dump_all([data], stream, Dumper=SafeDumper, **kwds)

def add_implicit_resolver(tag, regexp, first=None,

Loader=Loader, Dumper=Dumper):

"""

Add an implicit scalar detector.

If an implicit scalar value matches the given regexp,

the corresponding tag is assigned to the scalar.

first is a sequence of possible initial characters or None.

"""

Loader.add_implicit_resolver(tag, regexp, first)

Dumper.add_implicit_resolver(tag, regexp, first)

def add_path_resolver(tag, path, kind=None, Loader=Loader, Dumper=Dumper):

"""

Add a path based resolver for the given tag.

A path is a list of keys that forms a path

to a node in the representation tree.

Keys can be string values, integers, or None.

"""

Loader.add_path_resolver(tag, path, kind)

Dumper.add_path_resolver(tag, path, kind)

def add_constructor(tag, constructor, Loader=Loader):

"""

Add a constructor for the given tag.

Constructor is a function that accepts a Loader instance

and a node object and produces the corresponding Python object.

"""

Loader.add_constructor(tag, constructor)

def add_multi_constructor(tag_prefix, multi_constructor, Loader=Loader):

"""

Add a multi-constructor for the given tag prefix.

Multi-constructor is called for a node if its tag starts with tag_prefix.

Multi-constructor accepts a Loader instance, a tag suffix,

and a node object and produces the corresponding Python object.

"""

Loader.add_multi_constructor(tag_prefix, multi_constructor)

def add_representer(data_type, representer, Dumper=Dumper):

"""

Add a representer for the given type.

Representer is a function accepting a Dumper instance

and an instance of the given data type

and producing the corresponding representation node.

"""

Dumper.add_representer(data_type, representer)

def add_multi_representer(data_type, multi_representer, Dumper=Dumper):

"""

Add a representer for the given type.

Multi-representer is a function accepting a Dumper instance

and an instance of the given data type or subtype

and producing the corresponding representation node.

"""

Dumper.add_multi_representer(data_type, multi_representer)

class YAMLObjectMetaclass(type):

"""

The metaclass for YAMLObject.

"""

def __init__(cls, name, bases, kwds):

super(YAMLObjectMetaclass, cls).__init__(name, bases, kwds)

if 'yaml_tag' in kwds and kwds['yaml_tag'] is not None:

cls.yaml_loader.add_constructor(cls.yaml_tag, cls.from_yaml)

cls.yaml_dumper.add_representer(cls, cls.to_yaml)

class YAMLObject(object):

"""

An object that can dump itself to a YAML stream

and load itself from a YAML stream.

"""

__metaclass__ = YAMLObjectMetaclass

__slots__ = () # no direct instantiation, so allow immutable subclasses

yaml_loader = Loader

yaml_dumper = Dumper

yaml_tag = None

yaml_flow_style = None

def from_yaml(cls, loader, node):

"""

Convert a representation node to a Python object.

"""

return loader.construct_yaml_object(node, cls)

from_yaml = classmethod(from_yaml)

def to_yaml(cls, dumper, data):

"""

Convert a Python object to a representation node.

"""

return dumper.represent_yaml_object(cls.yaml_tag, data, cls,

flow_style=cls.yaml_flow_style)

to_yaml = classmethod(to_yaml)

netdata/python.d/python_modules/pyyaml2/__init__.py at master · jamesblunt/netdata · GitHub

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