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Начиная с Python 3.0, при возникновении нового исключения внутри блока except перехваченное исключение автоматически сохраняется в атрибуте __context__ создаваемого исключения. В результате при выводе будут показаны оба исключения:


try:
1 / 0
except ZeroDivisionError:
raise ValueError('Zero!')



(most recent call last):
File "test.py", line 2, in <module>
1 / 0
ZeroDivisionError: division by zero

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "test.py", line 4, in <module>
raise ValueError('Zero!')
ValueError: Zero!


Кроме того, вы можете явно указать причинное исключение, использовав конструкцию raise … from. Тогда в атрибут __cause__ нового исключения будет помещено исходное:


division_error = None

try:
1 / 0
except ZeroDivisionError as e:
division_error = e

raise ValueError('Zero!') from division_error



(most recent call last):
File "test.py", line 4, in <module>
1 / 0
ZeroDivisionError: division by zero

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

Traceback (most recent call last):
File "test.py", line 8, in <module>
raise ValueError('Zero!') from division_error
ValueError: Zero!


👉@BookPython



tg-me.com/BookPython/3701
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Начиная с Python 3.0, при возникновении нового исключения внутри блока except перехваченное исключение автоматически сохраняется в атрибуте __context__ создаваемого исключения. В результате при выводе будут показаны оба исключения:


try:
1 / 0
except ZeroDivisionError:
raise ValueError('Zero!')



(most recent call last):
File "test.py", line 2, in <module>
1 / 0
ZeroDivisionError: division by zero

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "test.py", line 4, in <module>
raise ValueError('Zero!')
ValueError: Zero!


Кроме того, вы можете явно указать причинное исключение, использовав конструкцию raise … from. Тогда в атрибут __cause__ нового исключения будет помещено исходное:


division_error = None

try:
1 / 0
except ZeroDivisionError as e:
division_error = e

raise ValueError('Zero!') from division_error



(most recent call last):
File "test.py", line 4, in <module>
1 / 0
ZeroDivisionError: division by zero

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

Traceback (most recent call last):
File "test.py", line 8, in <module>
raise ValueError('Zero!') from division_error
ValueError: Zero!


👉@BookPython

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How to Invest in Bitcoin?

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Why Telegram?

Telegram has no known backdoors and, even though it is come in for criticism for using proprietary encryption methods instead of open-source ones, those have yet to be compromised. While no messaging app can guarantee a 100% impermeable defense against determined attackers, Telegram is vulnerabilities are few and either theoretical or based on spoof files fooling users into actively enabling an attack.

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