print python stack trace without exception being raised

user_15055 0
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Something is happening with one of my class's instance variables. I want to make the variable a property, and whenever it is accessed I want to print out the stack trace of all the code leading up to that point, so I can see where it's being messed with. How do I print out the stack trace when no exception has been raised? I know if there is an exception I can do something like traceback.format_tb(sys.exc_info()[2]).

Also what might be useful is to print only the last 3-4 levels, since the first few are probably not going to be that interesting.

stack-trace python debugging
2 Answers

Instead of printing to stdout, if you need a string to pass to a logger you can use:

''.join(traceback.format_stack())

Note, that traceback.format_stack() returns the stacktrace as a formatted list of strings, so you can slice it anyway you want. To get the last few elements of the stacktrace you could do:

''.join(traceback.format_stack()[-N:])

Where N is the number of levels you are interested in.

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