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import datetime
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import pytz
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from django.utils import timezone as dj_timezone
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from rest_framework.fields import DateTimeField
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max = datetime.datetime.max.replace(tzinfo=datetime.timezone.utc)
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def astimezone(dt: datetime.datetime, tzinfo: pytz.tzinfo.DstTzInfo):
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assert dj_timezone.is_aware(dt)
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return tzinfo.normalize(dt.astimezone(tzinfo))
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def as_china_cst(dt: datetime.datetime):
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return astimezone(dt, pytz.timezone('Asia/Shanghai'))
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def as_current_tz(dt: datetime.datetime):
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return astimezone(dt, dj_timezone.get_current_timezone())
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def utc_now():
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return dj_timezone.now()
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def local_now():
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return dj_timezone.localtime(dj_timezone.now())
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def local_now_display(fmt='%Y-%m-%d %H:%M:%S'):
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return local_now().strftime(fmt)
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_rest_dt_field = DateTimeField()
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dt_parser = _rest_dt_field.to_internal_value
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dt_formatter = _rest_dt_field.to_representation
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