This is the documentation for a Python implementation of
a mapping between objects and XML.
The idea is that you can just write your python classes
as you would anyway, e.g.:
class Network:
def __init__(self):
self.states = {}
self.connections = []
def addState(self, s):
self.states[s.name]=s
class State:
def __init__(self, n=None, c=0):
self.name = n
self.count = c
class Connection:
def __init__(self, s1=None, s2=None, w=0.0):
self.s1 = s1
self.s2 = s2
self.w = w
... and create an XML schema file (in our peculiar format), to give the generic parser
some hints on types of things which are not available from
within python space:
<Package name="test.network">
<Class name="Network">
<Field name="states" type="list" elementType="State" xmlstyle="hidefield"/>
<Field name="connections" type="list" elementType="Connection" xmlstyle="hidefield"/>
</Class>
<Class name="State">
<Field name="name" type="string"/>
<Field name="count" type="int"/>
</Class>
<Class name="Connection">
<Field name="s1" type="ref" elementType="State"/>
<Field name="s2" type="ref" elementType="State"/>
<Field name="w" type="double"/>
</Class>
</Package>
... and that should be all the work you have to do.
To convert object trees to/from XML, use:-
- First read the schema:-
netSchema = parseSchemaFile("test-net.sch")
- Then you can write out an object as xml:-
print serializeObject(net, netSchema)
- ... and read in an XML file as an object using:-
tree = parseXMLFile("test-net.xml", locals(), netSchema)
... Here is a sample XML file:-
<Network>
<Connection s1="s1" s2="s2" w="0.5"/>
<Connection s1="s3" s2="s2" w="0.5"/>
<Connection s1="s2" s2="s3" w="0.5"/>
<Connection s1="s4" s2="s2" w="0.5"/>
<State count="100" name="s3"/>
<State count="100" name="s2"/>
<State count="100" name="s1"/>
<State count="100" name="s4"/>
</Network>
