main.py

import logging

logging.getLogger().setLevel( logging.DEBUG )

class log_class:
def __init__( self ):
self.depth = 0
def wrap( self, func ):
def wrap( *args, **kwargs ):
self.info( 'starting ' + func.__name__ )
self.depth += 1
result = func( *args, **kwargs )
self.info( 'ending ' + func.__name__ )
self.depth -= 1
return result
return wrap
def info( self, text ):
logging.info( ' ' * self.depth + text )

log = log_class()

@log.wrap
def factorial( n ):
log.info( f'{n = }' )
return n * factorial( n - 1 ) if n else 1

factorial( 2 )

output

INFO:root:starting factorial
INFO:root: n = 2
INFO:root: starting factorial
INFO:root: n = 1
INFO:root: starting factorial
INFO:root: n = 0
INFO:root: ending factorial
INFO:root: ending factorial
INFO:root: ending factorial

previous "from my lab" posts

Adding "start" and "end" methods to a logger
1 How a function can get its own name
2 Logging function entry and exit

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