Hi, Frédéric Mantegazza wrote:
I have a problem with a XSLT filter:
Traceback (most recent call last): File "/home/pymad/PyMAD/server/macros/freeScan.py", line 247, in doAction DataManager().newScanPoint(numPoint, 'NSF') File "/home/pymad/PyMAD/server/managers/dataManager.py", line 253, in newScanPoint self.__scan.setPoint(numPoint, numPal) File "/home/pymad/PyMAD/server/data/scanData.py", line 221, in setPoint self.__serialize() File "/home/pymad/PyMAD/server/data/scanData.py", line 196, in __serialize filter_.dumpScan(self.__tree, self.__scanBaseName) File "/home/pymad/PyMAD/server/data/dataFilters.py", line 122, in dumpScan result = self.__xslFilter.apply(tree, fileName="'%s'" % baseName) File "xslt.pxi", line 450, in etree.XSLT.apply File "xslt.pxi", line 356, in etree.XSLT.__call__ RuntimeError: stylesheet is not usable in this thread
This error ocurs on a machine, and not on another, which has the same install (debian etch, lxml 1.1.1).
That's a pretty old version, but the general restriction still applies. You cannot use an XSLT object in a different thread if it was not created in the main thread (that's due to some optimisations in libxslt). Try preparing the stylesheets in the main thread. Or, if you do not control the main thread, consider creating them on the fly and maybe caching them in thread local storage. Stefan