Python 3 รองรับ Exception Chaining ด้วย raise ... from
ตัวอย่าง
try:
1/0
except ZeroDivisionError as e:
raise ValueError("Sweet n Sour grapes") from e
ผลลัพธ์ Python 3
Traceback (most recent call last): File "...", line 2, in1/0 ZeroDivisionError: division by zero The above exception was the direct cause of the following exception: Traceback (most recent call last): File "...", line 4, in raise ValueError("Sweet n Sour grapes") from e ValueError: Sweet n Sour grapes
Attribute __cause__ เก็บ original exception