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'Request succeeded, process the reply @param binding: The binding to be used to process the reply. @type binding: L{bindings.binding.Binding} @param reply: The raw reply text. @type reply: str @return: The method result. @rtype: I{builtin}, L{Object} @raise WebFault: On server.'
def succeeded(self, binding, reply):
log.debug('http succeeded:\n%s', reply) plugins = PluginContainer(self.options.plugins) if (len(reply) > 0): (reply, result) = binding.get_reply(self.method, reply) self.last_received(reply) else: result = None ctx = plugins.message.unmarshalled(reply=result) result = ...
'Request failed, process reply based on reason @param binding: The binding to be used to process the reply. @type binding: L{suds.bindings.binding.Binding} @param error: The http error message @type error: L{transport.TransportError}'
def failed(self, binding, error):
(status, reason) = (error.httpcode, tostr(error)) reply = error.fp.read() log.debug('http failed:\n%s', reply) if (status == 500): if (len(reply) > 0): (r, p) = binding.get_fault(reply) self.last_received(r) return (status, p) else: retu...
'get whether loopback has been specified in the I{kwargs}.'
@classmethod def simulation(cls, kwargs):
return kwargs.has_key(SimClient.injkey)
'Send the required soap message to invoke the specified method @param args: A list of args for the method invoked. @type args: list @param kwargs: Named (keyword) args for the method invoked. @type kwargs: dict @return: The result of the method invocation. @rtype: I{builtin} or I{subclass of} L{Object}'
def invoke(self, args, kwargs):
simulation = kwargs[self.injkey] msg = simulation.get('msg') reply = simulation.get('reply') fault = simulation.get('fault') if (msg is None): if (reply is not None): return self.__reply(reply, args, kwargs) if (fault is not None): return self.__fault(fault) ...
'simulate the reply'
def __reply(self, reply, args, kwargs):
binding = self.method.binding.input msg = binding.get_message(self.method, args, kwargs) log.debug('inject (simulated) send message:\n%s', msg) binding = self.method.binding.output return self.succeeded(binding, reply)
'simulate the (fault) reply'
def __fault(self, reply):
binding = self.method.binding.output if self.options.faults: (r, p) = binding.get_fault(reply) self.last_received(r) return (500, p) else: return (500, None)
''
def __init__(self):
self.appender = ContentAppender(self)
'Process (marshal) the tag with the specified value using the optional type information. @param content: The content to process. @type content: L{Object}'
def process(self, content):
log.debug('processing:\n%s', content) self.reset() if (content.tag is None): content.tag = content.value.__class__.__name__ document = Document() if isinstance(content.value, Property): root = self.node(content) self.append(document, content) else: self.append(doc...
'Append the specified L{content} to the I{parent}. @param parent: The parent node to append to. @type parent: L{Element} @param content: The content to append. @type content: L{Object}'
def append(self, parent, content):
log.debug('appending parent:\n%s\ncontent:\n%s', parent, content) if self.start(content): self.appender.append(parent, content) self.end(parent, content)
'Reset the marshaller.'
def reset(self):
pass
'Create and return an XML node. @param content: The content for which proccessing has been suspended. @type content: L{Object} @return: An element. @rtype: L{Element}'
def node(self, content):
return Element(content.tag)
'Appending this content has started. @param content: The content for which proccessing has started. @type content: L{Content} @return: True to continue appending @rtype: boolean'
def start(self, content):
return True
'Appending this content has suspended. @param content: The content for which proccessing has been suspended. @type content: L{Content}'
def suspend(self, content):
pass
'Appending this content has resumed. @param content: The content for which proccessing has been resumed. @type content: L{Content}'
def resume(self, content):
pass
'Appending this content has ended. @param parent: The parent node ending. @type parent: L{Element} @param content: The content for which proccessing has ended. @type content: L{Content}'
def end(self, parent, content):
pass
'Set the value of the I{node} to nill. @param node: A I{nil} node. @type node: L{Element} @param content: The content to set nil. @type content: L{Content}'
def setnil(self, node, content):
pass
'Set the value of the I{node} to a default value. @param node: A I{nil} node. @type node: L{Element} @param content: The content to set the default value. @type content: L{Content} @return: The default.'
def setdefault(self, node, content):
pass
'Get whether the specified content is optional. @param content: The content which to check. @type content: L{Content}'
def optional(self, content):
return False
'@param tag: The content tag. @type tag: str @param value: The content\'s value. @type value: I{any}'
def __init__(self, tag=None, value=None, **kwargs):
Object.__init__(self) self.tag = tag self.value = value for (k, v) in kwargs.items(): setattr(self, k, v)
'@param schema: A schema object @type schema: L{xsd.schema.Schema} @param xstq: The B{x}ml B{s}chema B{t}ype B{q}ualified flag indicates that the I{xsi:type} attribute values should be qualified by namespace. @type xstq: bool'
def __init__(self, schema, xstq=True):
Core.__init__(self) self.schema = schema self.xstq = xstq self.resolver = GraphResolver(self.schema)
'Get whether to skip this I{content}. Should be skipped when the content is optional and either the value=None or the value is an empty list. @param content: The content to skip. @type content: L{Object} @return: True if content is to be skipped. @rtype: bool'
def skip(self, content):
if self.optional(content): v = content.value if (v is None): return True if (isinstance(v, (list, tuple)) and (len(v) == 0)): return True return False
'Translate using the XSD type information. Python I{dict} is translated to a suds object. Most importantly, primative values are translated from python types to XML types using the XSD type. @param content: The content to translate. @type content: L{Object} @return: self @rtype: L{Typed}'
def translate(self, content):
v = content.value if (v is None): return if isinstance(v, dict): cls = content.real.name content.value = Factory.object(cls, v) md = content.value.__metadata__ md.sxtype = content.type return v = content.real.translate(v, False) content.value = v r...
'Sort suds object attributes based on ordering defined in the XSD type information. @param content: The content to sort. @type content: L{Object} @return: self @rtype: L{Typed}'
def sort(self, content):
v = content.value if isinstance(v, Object): md = v.__metadata__ md.ordering = self.ordering(content.real) return self
'Get the attribute ordering defined in the specified XSD type information. @param type: An XSD type object. @type type: SchemaObject @return: An ordered list of attribute names. @rtype: list'
def ordering(self, type):
result = [] for (child, ancestry) in type.resolve(): name = child.name if (child.name is None): continue if child.isattr(): name = ('_%s' % child.name) result.append(name) return result
'Cast the I{untyped} list items found in content I{value}. Each items contained in the list is checked for XSD type information. Items (values) that are I{untyped}, are replaced with suds objects and type I{metadata} is added. @param content: The content holding the collection. @type content: L{Content} @return: self @...
def cast(self, content):
aty = content.aty[1] resolved = content.type.resolve() array = Factory.object(resolved.name) array.item = [] query = TypeQuery(aty) ref = query.execute(self.schema) if (ref is None): raise TypeNotFound(qref) for x in content.value: if isinstance(x, (list, tuple)): ...
'@param cls: A class object. @type cls: I{classobj}'
def __init__(self, cls):
self.cls = cls
'@param marshaller: A marshaller. @type marshaller: L{suds.mx.core.Core}'
def __init__(self, marshaller):
self.default = PrimativeAppender(marshaller) self.appenders = ((Matcher(None), NoneAppender(marshaller)), (Matcher(null), NoneAppender(marshaller)), (Matcher(Property), PropertyAppender(marshaller)), (Matcher(Object), ObjectAppender(marshaller)), (Matcher(Element), ElementAppender(marshaller)), (Matcher(Text), ...
'Select an appender and append the content to parent. @param parent: A parent node. @type parent: L{Element} @param content: The content to append. @type content: L{Content}'
def append(self, parent, content):
appender = self.default for a in self.appenders: if (a[0] == content.value): appender = a[1] break appender.append(parent, content)
'@param marshaller: A marshaller. @type marshaller: L{suds.mx.core.Core}'
def __init__(self, marshaller):
self.marshaller = marshaller
'Create and return an XML node that is qualified using the I{type}. Also, make sure all referenced namespace prefixes are declared. @param content: The content for which proccessing has ended. @type content: L{Object} @return: A new node. @rtype: L{Element}'
def node(self, content):
return self.marshaller.node(content)
'Set the value of the I{node} to nill. @param node: A I{nil} node. @type node: L{Element} @param content: The content for which proccessing has ended. @type content: L{Object}'
def setnil(self, node, content):
self.marshaller.setnil(node, content)
'Set the value of the I{node} to a default value. @param node: A I{nil} node. @type node: L{Element} @param content: The content for which proccessing has ended. @type content: L{Object} @return: The default.'
def setdefault(self, node, content):
return self.marshaller.setdefault(node, content)
'Get whether the specified content is optional. @param content: The content which to check. @type content: L{Content}'
def optional(self, content):
return self.marshaller.optional(content)
'Notify I{marshaller} that appending this content has suspended. @param content: The content for which proccessing has been suspended. @type content: L{Object}'
def suspend(self, content):
self.marshaller.suspend(content)
'Notify I{marshaller} that appending this content has resumed. @param content: The content for which proccessing has been resumed. @type content: L{Object}'
def resume(self, content):
self.marshaller.resume(content)
'Append the specified L{content} to the I{parent}. @param content: The content to append. @type content: L{Object}'
def append(self, parent, content):
self.marshaller.append(parent, content)
'Automatically set the node\'s xsi:type attribute based on either I{value}\'s class or the class of the node\'s text. When I{value} is an unmapped class, the default type (xs:any) is set. @param node: An XML node @type node: L{sax.element.Element} @param value: An object that is or would be the node\'s text. @type val...
@classmethod def auto(cls, node, value=None):
if (value is None): value = node.getText() if isinstance(value, Object): known = cls.known(value) if (known.name is None): return node tm = (known.name, known.namespace()) else: tm = cls.types.get(value.__class__, cls.types.get(str)) cls.manual(node, *...
'Set the node\'s xsi:type attribute based on either I{value}\'s class or the class of the node\'s text. Then adds the referenced prefix(s) to the node\'s prefix mapping. @param node: An XML node @type node: L{sax.element.Element} @param tval: The name of the schema type. @type tval: str @param ns: The XML namespace of...
@classmethod def manual(cls, node, tval, ns=None):
xta = ':'.join((NS.xsins[0], 'type')) node.addPrefix(NS.xsins[0], NS.xsins[1]) if (ns is None): node.set(xta, tval) else: ns = cls.genprefix(node, ns) qname = ':'.join((ns[0], tval)) node.set(xta, qname) node.addPrefix(ns[0], ns[1]) return node
'Generate a prefix. @param node: An XML node on which the prefix will be used. @type node: L{sax.element.Element} @param ns: A namespace needing an unique prefix. @type ns: (prefix, uri) @return: The I{ns} with a new prefix.'
@classmethod def genprefix(cls, node, ns):
for n in range(1, 1024): p = ('ns%d' % n) u = node.resolvePrefix(p, default=None) if ((u is None) or (u == ns[1])): return (p, ns[1]) raise Exception('auto prefix, exhausted')
'Process (marshal) the tag with the specified value using the optional type information. @param value: The value (content) of the XML node. @type value: (L{Object}|any) @param tag: The (optional) tag name for the value. The default is value.__class__.__name__ @type tag: str @return: An xml node. @rtype: L{Element}'
def process(self, value, tag=None):
content = Content(tag=tag, value=value) result = Core.process(self, content) return result
'Suds client initialization. Called after wsdl the has been loaded. Provides the plugin with the opportunity to inspect/modify the WSDL. @param context: The init context. @type context: L{InitContext}'
def initialized(self, context):
pass
'Suds has loaded a WSDL/XSD document. Provides the plugin with an opportunity to inspect/modify the unparsed document. Called after each WSDL/XSD document is loaded. @param context: The document context. @type context: L{DocumentContext}'
def loaded(self, context):
pass
'Suds has parsed a WSDL/XSD document. Provides the plugin with an opportunity to inspect/modify the parsed document. Called after each WSDL/XSD document is parsed. @param context: The document context. @type context: L{DocumentContext}'
def parsed(self, context):
pass
'Suds will send the specified soap envelope. Provides the plugin with the opportunity to inspect/modify the envelope Document before it is sent. @param context: The send context. The I{envelope} is the envelope docuemnt. @type context: L{MessageContext}'
def marshalled(self, context):
pass
'Suds will send the specified soap envelope. Provides the plugin with the opportunity to inspect/modify the message text it is sent. @param context: The send context. The I{envelope} is the envelope text. @type context: L{MessageContext}'
def sending(self, context):
pass
'Suds has received the specified reply. Provides the plugin with the opportunity to inspect/modify the received XML text before it is SAX parsed. @param context: The reply context. The I{reply} is the raw text. @type context: L{MessageContext}'
def received(self, context):
pass
'Suds has sax parsed the received reply. Provides the plugin with the opportunity to inspect/modify the sax parsed DOM tree for the reply before it is unmarshalled. @param context: The reply context. The I{reply} is DOM tree. @type context: L{MessageContext}'
def parsed(self, context):
pass
'Suds has unmarshalled the received reply. Provides the plugin with the opportunity to inspect/modify the unmarshalled reply object before it is returned. @param context: The reply context. The I{reply} is unmarshalled suds object. @type context: L{MessageContext}'
def unmarshalled(self, context):
pass
'@param plugins: A list of plugin objects. @type plugins: [L{Plugin},]'
def __init__(self, plugins):
self.plugins = plugins
'@param name: The method name. @type name: str @param domain: A plugin domain. @type domain: L{PluginDomain}'
def __init__(self, name, domain):
self.name = name self.domain = domain
'@param kwargs: Keyword arguments. - B{proxy} - An http proxy to be specified on requests. The proxy is defined as {protocol:proxy,} - type: I{dict} - default: {} - B{timeout} - Set the url open timeout (seconds). - type: I{float} - default: 90 - B{username} - The username used for http authentication. - type: I{str} -...
def __init__(self, **kwargs):
HttpTransport.__init__(self, **kwargs) self.pm = u2.HTTPPasswordMgrWithDefaultRealm()
'@param url: The url for the request. @type url: str @param message: The (optional) message to be send in the request. @type message: str'
def __init__(self, url, message=None):
self.url = url self.headers = {} self.message = message
'@param code: The http code returned. @type code: int @param headers: The http returned headers. @type headers: dict @param message: The (optional) reply message received. @type message: str'
def __init__(self, code, headers, message):
self.code = code self.headers = headers self.message = message
'Constructor.'
def __init__(self):
from suds.transport.options import Options self.options = Options() del Options
'Open the url in the specified request. @param request: A transport request. @type request: L{Request} @return: An input stream. @rtype: stream @raise TransportError: On all transport errors.'
def open(self, request):
raise Exception('not-implemented')
'Send soap message. Implementations are expected to handle: - proxies - I{http} headers - cookies - sending message - brokering exceptions into L{TransportError} @param request: A transport request. @type request: L{Request} @return: The reply @rtype: L{Reply} @raise TransportError: On all transport errors.'
def send(self, request):
raise Exception('not-implemented')
'@param kwargs: Keyword arguments. - B{proxy} - An http proxy to be specified on requests. The proxy is defined as {protocol:proxy,} - type: I{dict} - default: {} - B{timeout} - Set the url open timeout (seconds). - type: I{float} - default: 90'
def __init__(self, **kwargs):
Transport.__init__(self) Unskin(self.options).update(kwargs) self.cookiejar = CookieJar() self.proxy = {} self.urlopener = None
'Add cookies in the cookiejar to the request. @param u2request: A urllib2 request. @rtype: u2request: urllib2.Requet.'
def addcookies(self, u2request):
self.cookiejar.add_cookie_header(u2request)
'Add cookies in the request to the cookiejar. @param u2request: A urllib2 request. @rtype: u2request: urllib2.Requet.'
def getcookies(self, fp, u2request):
self.cookiejar.extract_cookies(fp, u2request)
'Open a connection. @param u2request: A urllib2 request. @type u2request: urllib2.Requet. @return: The opened file-like urllib2 object. @rtype: fp'
def u2open(self, u2request):
tm = self.options.timeout url = self.u2opener() if (self.u2ver() < 2.6): socket.setdefaulttimeout(tm) return url.open(u2request) else: return url.open(u2request, timeout=tm)
'Create a urllib opener. @return: An opener. @rtype: I{OpenerDirector}'
def u2opener(self):
if (self.urlopener is None): return u2.build_opener(*self.u2handlers()) else: return self.urlopener
'Get a collection of urllib handlers. @return: A list of handlers to be installed in the opener. @rtype: [Handler,...]'
def u2handlers(self):
handlers = [] handlers.append(u2.ProxyHandler(self.proxy)) return handlers
'Get the major/minor version of the urllib2 lib. @return: The urllib2 version. @rtype: float'
def u2ver(self):
try: part = u2.__version__.split('.', 1) n = float('.'.join(part)) return n except Exception as e: log.exception(e) return 0
'Prepend schema object\'s from B{s}ource list to the B{d}estination list while applying the filter. @param d: The destination list. @type d: list @param s: The source list. @type s: list @param filter: A filter that allows items to be prepended. @type filter: L{Filter}'
@classmethod def prepend(cls, d, s, filter=Filter()):
i = 0 for x in s: if (x in filter): d.insert(i, x) i += 1
'Append schema object\'s from B{s}ource list to the B{d}estination list while applying the filter. @param d: The destination list. @type d: list @param s: The source list. @type s: list @param filter: A filter that allows items to be appended. @type filter: L{Filter}'
@classmethod def append(cls, d, s, filter=Filter()):
for item in s: if (item in filter): d.append(item)
'@param schema: The containing schema. @type schema: L{schema.Schema} @param root: The xml root node. @type root: L{Element}'
def __init__(self, schema, root):
self.schema = schema self.root = root self.id = objid(self) self.name = root.get('name') self.qname = (self.name, schema.tns[1]) self.min = root.get('minOccurs') self.max = root.get('maxOccurs') self.type = root.get('type') self.ref = root.get('ref') self.form_qualified = schema....
'Get only the attribute content. @param filter: A filter to constrain the result. @type filter: L{Filter} @return: A list of tuples (attr, ancestry) @rtype: [(L{SchemaObject}, [L{SchemaObject},..]),..]'
def attributes(self, filter=Filter()):
result = [] for (child, ancestry) in self: if (child.isattr() and (child in filter)): result.append((child, ancestry)) return result
'Get only the I{direct} or non-attribute content. @param filter: A filter to constrain the result. @type filter: L{Filter} @return: A list tuples: (child, ancestry) @rtype: [(L{SchemaObject}, [L{SchemaObject},..]),..]'
def children(self, filter=Filter()):
result = [] for (child, ancestry) in self: if ((not child.isattr()) and (child in filter)): result.append((child, ancestry)) return result
'Get (find) a I{non-attribute} attribute by name. @param name: A attribute name. @type name: str @return: A tuple: the requested (attribute, ancestry). @rtype: (L{SchemaObject}, [L{SchemaObject},..])'
def get_attribute(self, name):
for (child, ancestry) in self.attributes(): if (child.name == name): return (child, ancestry) return (None, [])
'Get (find) a I{non-attribute} child by name. @param name: A child name. @type name: str @return: A tuple: the requested (child, ancestry). @rtype: (L{SchemaObject}, [L{SchemaObject},..])'
def get_child(self, name):
for (child, ancestry) in self.children(): if (child.any() or (child.name == name)): return (child, ancestry) return (None, [])
'Get this properties namespace @param prefix: The default prefix. @type prefix: str @return: The schema\'s target namespace @rtype: (I{prefix},I{URI})'
def namespace(self, prefix=None):
ns = self.schema.tns if (ns[0] is None): ns = (prefix, ns[1]) return ns
'Get whether this node is unbounded I{(a collection)} @return: True if unbounded, else False. @rtype: boolean'
def unbounded(self):
max = self.max if (max is None): max = '1' if max.isdigit(): return (int(max) > 1) else: return (max == 'unbounded')
'Get whether this type is optional. @return: True if optional, else False @rtype: boolean'
def optional(self):
min = self.min if (min is None): min = '1' return (min == '0')
'Get whether this type is required. @return: True if required, else False @rtype: boolean'
def required(self):
return (not self.optional())
'Resolve and return the nodes true self. @param nobuiltin: Flag indicates that resolution must not continue to include xsd builtins. @return: The resolved (true) type. @rtype: L{SchemaObject}'
def resolve(self, nobuiltin=False):
return self.cache.get(nobuiltin, self)
'Get whether this is an <xs:sequence/> @return: True if <xs:sequence/>, else False @rtype: boolean'
def sequence(self):
return False
'Get whether this is an <xs:list/> @return: True if any, else False @rtype: boolean'
def xslist(self):
return False
'Get whether this is an <xs:all/> @return: True if any, else False @rtype: boolean'
def all(self):
return False
'Get whether this is n <xs:choice/> @return: True if any, else False @rtype: boolean'
def choice(self):
return False
'Get whether this is an <xs:any/> @return: True if any, else False @rtype: boolean'
def any(self):
return False
'Get whether this is a schema-instance (xs) type. @return: True if any, else False @rtype: boolean'
def builtin(self):
return False
'Get whether this is a simple-type containing an enumeration. @return: True if any, else False @rtype: boolean'
def enum(self):
return False
'Get whether the object is a schema I{attribute} definition. @return: True if an attribute, else False. @rtype: boolean'
def isattr(self):
return False
'Get whether the object is an extension of another type. @return: True if an extension, else False. @rtype: boolean'
def extension(self):
return False
'Get whether the object is an restriction of another type. @return: True if an restriction, else False. @rtype: boolean'
def restriction(self):
return False
'Get whether this I{mixed} content.'
def mixed(self):
return False
'Find a referenced type in self or children. @param qref: A qualified reference. @type qref: qref @param classes: A list of classes used to qualify the match. @type classes: [I{class},...] @return: The referenced type. @rtype: L{SchemaObject} @see: L{qualify()}'
def find(self, qref, classes=()):
if (not len(classes)): classes = (self.__class__,) if ((self.qname == qref) and (self.__class__ in classes)): return self for c in self.rawchildren: p = c.find(qref, classes) if (p is not None): return p return None
'Translate a value (type) to/from a python type. @param value: A value to translate. @return: The converted I{language} type.'
def translate(self, value, topython=True):
return value
'Get a list of valid child tag names. @return: A list of child tag names. @rtype: [str,...]'
def childtags(self):
return ()
'Get a list of dependancies for dereferencing. @return: A merge dependancy index and a list of dependancies. @rtype: (int, [L{SchemaObject},...])'
def dependencies(self):
return (None, [])
'The list of I{auto} qualified attribute values. Qualification means to convert values into I{qref}. @return: A list of attibute names. @rtype: list'
def autoqualified(self):
return ['type', 'ref']
'Convert attribute values, that are references to other objects, into I{qref}. Qualfied using default document namespace. Since many wsdls are written improperly: when the document does not define a default namespace, the schema target namespace is used to qualify references.'
def qualify(self):
defns = self.root.defaultNamespace() if Namespace.none(defns): defns = self.schema.tns for a in self.autoqualified(): ref = getattr(self, a) if (ref is None): continue if isqref(ref): continue qref = qualify(ref, self.root, defns) log.d...
'Merge another object as needed.'
def merge(self, other):
other.qualify() for n in ('name', 'qname', 'min', 'max', 'default', 'type', 'nillable', 'form_qualified'): if (getattr(self, n) is not None): continue v = getattr(other, n) if (v is None): continue setattr(self, n, v)
'Get a I{flattened} list of this nodes contents. @param collection: A list to fill. @type collection: list @param filter: A filter used to constrain the result. @type filter: L{Filter} @param history: The history list used to prevent cyclic dependency. @type history: list @return: The filled list. @rtype: list'
def content(self, collection=None, filter=Filter(), history=None):
if (collection is None): collection = [] if (history is None): history = [] if (self in history): return collection history.append(self) if (self in filter): collection.append(self) for c in self.rawchildren: c.content(collection, filter, history[:]) r...
'Get a string representation of this object. @param indent: The indent. @type indent: int @return: A string. @rtype: str'
def str(self, indent=0, history=None):
if (history is None): history = [] if (self in history): return ('%s ...' % Repr(self)) history.append(self) tab = ('%*s' % ((indent * 3), '')) result = [] result.append(('%s<%s' % (tab, self.id))) for n in self.description(): if (not hasattr(self, n)): ...
'Get the names used for str() and repr() description. @return: A dictionary of relavent attributes. @rtype: [str,...]'
def description(self):
return ()
'@param sx: A schema object. @type sx: L{SchemaObject}'
def __init__(self, sx):
self.sx = sx self.items = sx.rawchildren self.index = 0
'Get the I{next} item in the frame\'s collection. @return: The next item or None @rtype: L{SchemaObject}'
def next(self):
if (self.index < len(self.items)): result = self.items[self.index] self.index += 1 return result
'@param sx: A schema object. @type sx: L{SchemaObject}'
def __init__(self, sx):
self.stack = [] self.push(sx)
'Create a frame and push the specified object. @param sx: A schema object to push. @type sx: L{SchemaObject}'
def push(self, sx):
self.stack.append(Iter.Frame(sx))