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naive -> aware

Last updated at Posted at 2020-02-20
  • 夏時間とか考慮しなくて良いならdatetimeだけでいけるのは良い
  • str -> naive -> aware(UTC) にしてからあつかう
  • datetime.replacetzinfo とか datetimetzinfo には pytz.timezone("Asia/Tokyo") を食わせてはいけない

まず import ,UTC/JSTの定義,日付文字列の用意


    from datetime import datetime, timedelta, timezone

    UTC = timezone.utc
    JST = timezone(timedelta(hours=+9), "JST")
    val = "2020/02/15T13:59:27Z"

string -> naive


    # 末尾のtimezone情報削るかただの文字列として扱う.strptimeに%zとか%Zとか渡さない
    naive = datetime.strptime(val, "%Y/%m/%dT%H:%M:%SZ")

naive -> aware


    aware_utc = naive.replace(tzinfo=UTC)

aware -> naive


    naive = aware_utc.replace(tzinfo=None)

違うtimezoneでの時間にする


    aware_jst = aware_utc.astimezone(JST)

違うtimezoneに書き換える


    aware_jst = aware_utc.replace(tzinfo=JST)

これらをダラダラと書きなぐったのがこれ

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