[go: up one dir, main page]
Skip to content

call-datetime-utcnow (DTZ003)

Added in v0.0.188 · Related issues · View source

Derived from the flake8-datetimez linter.

What it does

Checks for usage of datetime.datetime.utcnow().

Why is this bad?

Python datetime objects can be naive or timezone-aware. While an aware object represents a specific moment in time, a naive object does not contain enough information to unambiguously locate itself relative to other datetime objects. Since this can lead to errors, it is recommended to always use timezone-aware objects.

datetime.datetime.utcnow() returns a naive datetime object; instead, use datetime.datetime.now(tz=...) to create a timezone-aware object.

Example

import datetime

datetime.datetime.utcnow()

Use instead:

import datetime

datetime.datetime.now(tz=datetime.timezone.utc)

Or, for Python 3.11 and later:

import datetime

datetime.datetime.now(tz=datetime.UTC)

References