"ast" <nomail@com.invalid> writes:
> Why variable ex doesn't exist ?
Because of a deliberate decision made to delete it. Silently.
This is documented:
When an exception has been assigned using as target, it is cleared
at the end of the except clause. This is as if
except E as N:
foo
was translated to
except E as N:
try:
foo
finally:
del N
This means the exception must be assigned to a different name to be
able to refer to it after the except clause. Exceptions are cleared
because with the traceback attached to them, they form a reference
cycle with the stack frame, keeping all locals in that frame alive
until the next garbage collection occurs.
<URL:https://docs.python.org/3/reference/compound_stmts.html#the-try-statement>
but I think this is a terrible idea. It silently deletes a name binding
from the current scope, without the code explicitly asking for that.
--
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`\ sex.” —Gore Vidal |
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Ben Finney
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