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pyyaml / lib / yaml / __init__.py

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Kirill Simonov ed172c1 

Kirill Simonov 98cc99c 
Kirill Simonov ed172c1 



Kirill Simonov 6932ece 

Kirill Simonov 98cc99c 
Kirill Simonov 6932ece 






Kirill Simonov ed172c1 
Kirill Simonov 6932ece 






Kirill Simonov ed172c1 
Kirill Simonov 6932ece 







Kirill Simonov 98cc99c 
Kirill Simonov 6932ece 







Kirill Simonov ed172c1 
Kirill Simonov 6932ece 







Kirill Simonov 98cc99c 
Kirill Simonov 6932ece 

































Kirill Simonov 98cc99c 



Kirill Simonov 6932ece 



Kirill Simonov 98cc99c 
Kirill Simonov 6932ece 


Kirill Simonov 98cc99c 
Kirill Simonov 6932ece 










Kirill Simonov 98cc99c 



Kirill Simonov 6932ece 











Kirill Simonov 98cc99c 
Kirill Simonov 6932ece 





Kirill Simonov 98cc99c 
Kirill Simonov 6932ece 


























Kirill Simonov 98cc99c 
Kirill Simonov 6932ece 





Kirill Simonov 98cc99c 
Kirill Simonov 6932ece 















Kirill Simonov e51f297 

Kirill Simonov 6932ece 





Kirill Simonov e51f297 

Kirill Simonov 6932ece 
Kirill Simonov e51f297 
Kirill Simonov 6932ece 





Kirill Simonov e51f297 

Kirill Simonov 6932ece 

















Kirill Simonov e51f297 








Kirill Simonov 6932ece 






































from error import *

from tokens import *
from events import *
from nodes import *

from loader import *
from dumper import *

def scan(stream, Loader=Loader):
    """
    Scan a YAML stream and produce scanning tokens.
    """
    loader = Loader(stream)
    while loader.check_token():
        yield loader.get_token()

def parse(stream, Loader=Loader):
    """
    Parse a YAML stream and produce parsing events.
    """
    loader = Loader(stream)
    while loader.check_event():
        yield loader.get_event()

def compose(stream, Loader=Loader):
    """
    Parse the first YAML document in a stream
    and produce the corresponding representation tree.
    """
    loader = Loader(stream)
    if loader.check_node():
        return loader.get_node()

def compose_all(stream, Loader=Loader):
    """
    Parse all YAML documents in a stream
    and produce corresponsing representation trees.
    """
    loader = Loader(stream)
    while loader.check_node():
        yield loader.get_node()

def load_all(stream, Loader=Loader):
    """
    Parse all YAML documents in a stream
    and produce corresponding Python objects.
    """
    loader = Loader(stream)
    while loader.check_data():
        yield loader.get_data()

def load(stream, Loader=Loader):
    """
    Parse the first YAML document in a stream
    and produce the corresponding Python object.
    """
    loader = Loader(stream)
    if loader.check_data():
        return loader.get_data()

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 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 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:
        try:
            from cStringIO import StringIO
        except ImportError:
            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)
    for event in events:
        dumper.emit(event)
    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:
        try:
            from cStringIO import StringIO
        except ImportError:
            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,
            encoding=encoding, version=version, tags=tags,
            explicit_start=explicit_start, explicit_end=explicit_end)
    dumper.open()
    for node in nodes:
        dumper.serialize(node)
    dumper.close()
    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,
        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:
        try:
            from cStringIO import StringIO
        except ImportError:
            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,
            encoding=encoding, version=version, tags=tags,
            explicit_start=explicit_start, explicit_end=explicit_end)
    dumper.open()
    for data in documents:
        dumper.represent(data)
    dumper.close()
    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_detector(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)

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

    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)