https://stackoverflow.com/questions/28208949/log-stack-trace

#!/usr/bin/env python
import logging
import logging.config
import traceback
import warnings

class Formatter(logging.Formatter):
    def format(self, record):
        record.stack_info = ''.join(traceback.format_stack())
        return super().format(record)

def configure_logging():
    warning_logger_name = 'py.warnings'

    logging.captureWarnings(True)

    logging.config.dictConfig({
        'formatters': {
            'f': {
                '()': '__main__.Formatter',
                'format': '%(name)s\n'
                          '%(pathname)s\n'
                          '%(lineno)d\n'
                          '%(message)s',
            },
        },
        'handlers': {
            'h': {
                'level':'WARN',
                'class':'logging.StreamHandler',
                'formatter':'f',
            },
        },
        'loggers': {
            warning_logger_name: {
                'handlers': ['h'],
            },
        },
        'version': 1,
    })

def main():
    f1()

def f1():
    f2()

def f2():
    f3()

def f3():
    warnings.warn('f3() warning')

if __name__ == '__main__':
    configure_logging()
    main()