Unfortunately the Cheetah templating engine takes the template and does its own stuff to it and generates a temporary .py file. The line numbers in cheetahgenerator errors that refer to a template file don't relate directly to the line numbers in your template but rather the temporary .py file and we don't have access to that file. How you troubleshoot cheetahgenerator errors depends on what the error is. In this case you have a clue - the python error:
May 8 08:00:20 jed164 weewx[10989]: **** TypeError: unsupported operand type(s) for -: 'NoneType' and 'NoneType' In this case somewhere in your template you have a subtraction operation and both operands are None. So you need to look through your template and find all the minus operations. Then critically look at the variables either side of the minus sign, work out if they could possibly be None, if they could be None then harden your code so that Nones are avoided or otherwise handled - try .. except statements can help trap such situations. Hopefully you only have one or two minus operators, otherwise you need to work through your template and find which one is the culprit. Common sources of None are using obs that exist but have no value (well they do exist their value is just None) or queries on the database that return no results. Sometimes you might get a more informative error that might point to a line in a search list extension - you can use those line numbers - and these are easy to pin point the offending line. Sometimes you will get a more general error and the only real approach is to comment out half your template at a time until you find the portion of code with the error and then home in on the offending line - these errors are a real pain, especially if you have a large and complex template. Gary -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
