python - 为什么 Django 使用元组进行设置而不是列表？

Question

引用 this answer :

Apart from tuples being immutable there is also a semantic distinction that should guide their usage. Tuples are heterogeneous data structures (i.e., their entries have different meanings), while lists are homogeneous sequences. Tuples have structure, lists have order.

这对我来说很有意义。但是为什么 Django 使用元组而不是列表进行设置呢？示例:

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.staticfiles',
)

这(以及所有其他设置)在语义上不是列表的完美案例吗？

Answer 1

这在 Django 1.9 中有所改变:

Default settings that were tuples are now lists

The default settings in django.conf.global_settings were a combination of lists and tuples. All settings that were formerly tuples are now lists.

https://docs.djangoproject.com/en/1.9/releases/1.9/#default-settings-that-were-tuples-are-now-lists