Repository with sources and generator of https://larlet.fr/david/ https://larlet.fr/david/
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

index.md 1005B

4 jaren geleden
12345678910
  1. title: Newbie issues
  2. lang: en
  3. > However, Python only initializes default parameters when the function is first evaluated, which means that the same list is used for every call to the function. As a result, if you mutate those values, the mutations span across invocations.
  4. >
  5. > In this case, user ids and names were appended to the default lists each time it was called. Over hours, those lists began to retrieve tens of thousands of users on each request, overwhelming even the memcache clusters.
  6. >
  7. > <cite>*[Digg's v4 launch: an optimism born of necessity.](https://lethain.com//digg-v4/)* ([cache](/david/cache/2b13b89a56718aa4fb6aea90cbdeab0f/))</cite>
  8. A good reminder that a full team of engineers can fail miserably at investigating a 101 Python course problem. I did that too, I probably will again. I should collect and publish my own *post mortem* mistakes, as [James Bennett did](https://www.b-list.org/weblog/2018/mar/20/mistakes/) ([cache](/david/cache/7306b2b46708f143bb25dc81d79879fe/)).