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  1. import functools
  2. import itertools
  3.  
  4. def repr_kwargs(kwargs):
  5. 	return (f"{key}={repr(value)}" for key, value in kwargs.items())
  6.  
  7. def log_argument_on_exception(func):
  8.     """Decorator that logs the argument value if an exception is raised."""
  9.  
  10.     @functools.wraps(func)
  11.     def wrapper(*args, **kwargs):
  12.         try:
  13.             return func(*args, **kwargs)
  14.         except Exception as e:
  15.             all_args = itertools.chain(map(repr, args), repr_kwargs(kwargs))
  16.             print(f"{func.__name__}({', '.join(all_args)})")
  17.             raise e
  18.  
  19.     return wrapper
  20.  
  21. class TestException(Exception):
  22.     "Raised for testing purposes"
  23.     pass
  24.  
  25.  
  26. @log_argument_on_exception
  27. def foo(a, b):
  28. 	raise TestException()
  29.  
  30. @log_argument_on_exception	
  31. def bar(a, **kwargs):
  32. 	raise TestException()
  33.  
  34.  
  35. try:
  36. 	foo(12, "asd")
  37. except TestException:
  38. 	pass
  39.  
  40. try:
  41. 	bar(12, b="asd", c=90.23)
  42. except TestException:
  43. 	pass
  44.  
  45.  
Success #stdin #stdout 0.03s 9568KB
comments (?)
stdin 
Standard input is empty
stdout 
foo(12, 'asd')
bar(12, b='asd', c=90.23)
https://ideone.com/lial2T
language:
Python 3 (python  3.9.5)
created:
1 year ago
visibility:
secret

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