test: fix default value for additional param #2553
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In Python, the default values of parameters are evaluated only once during their declaration. So, whenever the default parameter is used the same object will be used. Since we use a list, which is a mutable object, this could lead to unexpected results.
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LGTM 👍 |
| if additional is not None: | ||
| self.additional_flags = additional | ||
| else: | ||
| self.additional_flags = [] |
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You could shorten this to self.additional_flags = additional or [].
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@bnoordhuis Correct but if an empty list is actually passed, we ll still ignore it and create a new list, if we do additional or [] . We don't want that.
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@bnoordhuis ping!
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LGTM with a suggestion. |
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Just to confirm: LGTM. A suggestion means you're free to take it or leave it. :-) |
thefourtheye
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Sep 15, 2015
In Python, the default values of parameters are evaluated only once during their declaration. So, whenever the default parameter is used the same object will be used. Since we use a list, which is a mutable object, this could lead to unexpected results. PR-URL: #2553 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
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Thanks for the review Ben, landed in 52f84ad. I had changed, the super call of |
thefourtheye
added a commit
that referenced
this pull request
Sep 15, 2015
In Python, the default values of parameters are evaluated only once during their declaration. So, whenever the default parameter is used the same object will be used. Since we use a list, which is a mutable object, this could lead to unexpected results. PR-URL: #2553 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
This was referenced Sep 26, 2022
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In Python, the default values of parameters are evaluated only once
during their declaration. So, whenever the default parameter is used
the same object will be used. Since we use a list, which is a mutable
object, this could lead to unexpected results.
cc @nodejs/build
CI Run: https://jenkins-iojs.nodesource.com/job/node-test-pull-request/169/