Traceback (most recent call last):
  File "explicit_chaining.py", line 10, in explicit_chaining
    1/0
ZeroDivisionError: division by zero

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "explicit_chaining.py", line 14, in <module>
    explicit_chaining()
  File "explicit_chaining.py", line 12, in explicit_chaining
    raise RuntimeError('Something') from ex
RuntimeError: Something