这里我们有一个带有Pandas. 我正在努力调整时间精度。 Title 1 Title 2 Title 3 Title 4 ... midprice t0 t1 tEvent2015-07-15 09:30:00+00:00 26730 26844 26851 26870 ... 267.020 09:29:59.500 09:30:00.000 20150715 09:30:00.0022015-07-15 09:30:00.499500032+00:00 26726 26830 26840 26844 ... 267.000 09:30:00.000 09:30:00.500 20150715 09:30:00.5992015-07-15 09:30:01+00:00 26730 26844 26851 26870 ... 267.020 09:30:00.500 09:30:01.000 20150715 09:30:01.0122015-07-15 09:30:01.499500032+00:00 26694 26768 26780 26800 ... 266.770 09:30:01.000 09:30:01.500 20150715 09:30:01.5572015-07-15 09:30:02+00:00 26695 26750 26768 26780 ... 266.775 09:30:01.500 09:30:02.000 20150715 09:30:02.0862015-07-15 09:30:02.499500032+00:00 26694 26750 26768 26780 ... 266.770 09:30:02.000 09:30:02.500 20150715 09:30:02.5842015-07-15 09:30:03+00:00 26694 26745 26750 26751 ... 266.770 09:30:02.500 09:30:03.000 20150715 09:30:03.1062015-07-15 09:30:03.499500032+00:00 26693 26745 26750 26751 ... 266.765 09:30:03.000 09:30:03.500 20150715 09:30:03.638如何更改时间列精度？
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