call-datetime-strptime-without-zone.md

call-datetime-strptime-without-zone (DTZ007)

lint.select = ["DTZ007"]

Replacing fields before converting the timezone

Calling astimezone produces an aware datetime even when one or more replace calls precede it.

from datetime import datetime, timezone

datetime.strptime("2026", "%Y").replace(microsecond=0).astimezone()
datetime.strptime("2026", "%Y").replace(hour=12).replace(minute=30).astimezone(timezone.utc)
datetime.strptime("2026", "%Y").replace(tzinfo=None).astimezone()

Replacements that leave a naive datetime

A replacement without a timezone conversion still produces a naive datetime.

from datetime import datetime

datetime.strptime("2026", "%Y").replace(microsecond=0)  # error: [call-datetime-strptime-without-zone]
datetime.strptime("2026", "%Y").replace(tzinfo=None)  # error: [call-datetime-strptime-without-zone]

Passing a method to another call

Passing the replace method to another object's method does not convert the parsed datetime.

from datetime import datetime

def convert(converter):
    converter.replace(datetime.strptime("2026", "%Y").replace).astimezone()  # error: [call-datetime-strptime-without-zone]