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demandimport: import sub-module relatively as expected (issue5208)
Before this patch, importing sub-module might (1) fail or (2) success
but import incorrect module, because demandimport tries to import
sub-module with level=-1 (on Python 2.x) or level=0 (on Python 3.x),
which is default value of "level" argument at construction of
"_demandmod" proxy object.
(1) on Python 3.x, importing sub-module always fails to import
existing sub-module
(2) both on Python 2.x and 3.x, importing sub-module might import
same name module on root level unintentionally
On Python 2.x, existing sub-module is prior to this unexpected
module. Therefore, this problem hasn't appeared.
To import sub-module relatively as expected, this patch specifies "1"
as import level explicitly at construction of "_demandmod" proxy
object for sub-module.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
---|---|
date | Sat, 06 Aug 2016 22:24:33 +0900 |
parents | 4b0fc75f9403 |
children | 76b171209151 |
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