YANQ: Yet Another Newbie Question !

[webdef]

Here is the code I try to improve:

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def getEventFromId(self, service, eventid):     event = None     if self.epgcache is not None and eventid is not None:         event = self.epgcache.lookupEventId(service.ref, eventid)     return event

When I print service.ref.ToString(), I have '4097:1:5:23'
I want to change "4097:" into "1:" without changing "service".
Something like:

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def getEventFromId(self, service, eventid):     event = None     if self.epgcache is not None and eventid is not None:         service2 = service         mywork=str(service)         if mywork.startswith("4097:"):             service2=  [b]??? [/b]mywork.replace("4097:","1:",1)         event = self.epgcache.lookupEventId(service2.ref, eventid)     return event

I am also a bit confuse about the meaning of "service.ref" !

Thanks for help.

[nilamo]

Without knowing what service is, we should assume it's an object, and ref is just a property of that object.  We can fake it like so:

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>>> class Service: ...   def __init__(self, tag): ...     self.ref = tag ... >>> service = Service("4097:1:5:23") >>> service.ref '4097:1:5:23'

If that's true (...and it might not be), then we could take the fact that strings are immutable in python, and work with it directly...

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>>> service.ref.startswith("4097:") True >>> new_tag = service.ref.replace("4097:", "1:", 1) >>> service.ref '4097:1:5:23' >>> new_tag '1:1:5:23'

Because strings are immutable, we have the new tag that we wanted (with 4097 replaced with 1), while service.ref is left unchanged.

Also, I added a count parameter to service.ref.replace, so that only the first 4097 found will be replaced.  That way, if the tag happens to look like "4097:1:4097:23", it won't be changed to "1:1:1:23".

[webdef]

Some feedback:
1) service.ref.replace(...)
Crash: service.ref has no attribute replace
2) service.ref=service2.ref(mywork.replace("4097:","1:",1))
Crash: TypeError: 'eServiceReference' object is not callable

I have found this for eServicereference:

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class eServiceReference(object):     thisown = _swig_property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc='The membership flag')     __repr__ = _swig_repr     idInvalid = _enigma.eServiceReference_idInvalid     idStructure = _enigma.eServiceReference_idStructure     idDVB = _enigma.eServiceReference_idDVB     idFile = _enigma.eServiceReference_idFile     idUser = _enigma.eServiceReference_idUser     type = _swig_property(_enigma.eServiceReference_type_get, _enigma.eServiceReference_type_set)     isDirectory = _enigma.eServiceReference_isDirectory     mustDescent = _enigma.eServiceReference_mustDescent     canDescent = _enigma.eServiceReference_canDescent     flagDirectory = _enigma.eServiceReference_flagDirectory     shouldSort = _enigma.eServiceReference_shouldSort     hasSortKey = _enigma.eServiceReference_hasSortKey     sort1 = _enigma.eServiceReference_sort1     isMarker = _enigma.eServiceReference_isMarker     isGroup = _enigma.eServiceReference_isGroup     flags = _swig_property(_enigma.eServiceReference_flags_get, _enigma.eServiceReference_flags_set)     def __init__(self, *args):         _enigma.eServiceReference_swiginit(self,_enigma.new_eServiceReference(*args))     __swig_destroy__ = _enigma.delete_eServiceReference eServiceReference.getSortKey = new_instancemethod(_enigma.eServiceReference_getSortKey,None,eServiceReference) eServiceReference.getPath = new_instancemethod(_enigma.eServiceReference_getPath,None,eServiceReference) eServiceReference.setPath = new_instancemethod(_enigma.eServiceReference_setPath,None,eServiceReference) eServiceReference.getUnsignedData = new_instancemethod(_enigma.eServiceReference_getUnsignedData,None,eServiceReference) eServiceReference.getData = new_instancemethod(_enigma.eServiceReference_getData,None,eServiceReference) eServiceReference.setUnsignedData = new_instancemethod(_enigma.eServiceReference_setUnsignedData,None,eServiceReference) eServiceReference.setData = new_instancemethod(_enigma.eServiceReference_setData,None,eServiceReference) eServiceReference.getName = new_instancemethod(_enigma.eServiceReference_getName,None,eServiceReference) eServiceReference.setName = new_instancemethod(_enigma.eServiceReference_setName,None,eServiceReference) eServiceReference.toString = new_instancemethod(_enigma.eServiceReference_toString,None,eServiceReference) eServiceReference.toCompareString = new_instancemethod(_enigma.eServiceReference_toCompareString,None,eServiceReference) eServiceReference.__eq__ = new_instancemethod(_enigma.eServiceReference___eq__,None,eServiceReference) eServiceReference.__ne__ = new_instancemethod(_enigma.eServiceReference___ne__,None,eServiceReference) eServiceReference.__lt__ = new_instancemethod(_enigma.eServiceReference___lt__,None,eServiceReference) eServiceReference.valid = new_instancemethod(_enigma.eServiceReference_valid,None,eServiceReference) eServiceReference_swigregister = _enigma.eServiceReference_swigregister eServiceReference_swigregister(eServiceReference)

[nilamo]

Neat.  service.ref.toString().replace( instead, then.