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datetime-min-max (DTZ901)

Added in 0.10.0 · Related issues · View source

Derived from the flake8-datetimez linter.

What it does

Checks for uses of datetime.datetime.min and datetime.datetime.max.

Why is this bad?

datetime.min and datetime.max are non-timezone-aware datetime objects.

As such, operations on datetime.min and datetime.max may behave unexpectedly, as in:

import datetime

# Timezone: UTC-14
datetime.datetime.min.timestamp()  # ValueError: year 0 is out of range
datetime.datetime.max.timestamp()  # ValueError: year 10000 is out of range

Example

import datetime

datetime.datetime.max

Use instead:

import datetime

datetime.datetime.max.replace(tzinfo=datetime.UTC)

References