test_datetime.py 文件源码

def test_datetime_as_string_timezone(self):
        # timezone='local' vs 'UTC'
        a = np.datetime64('2010-03-15T06:30Z', 'm')
        assert_equal(np.datetime_as_string(a, timezone='UTC'),
                '2010-03-15T06:30Z')
        assert_(np.datetime_as_string(a, timezone='local') !=
                '2010-03-15T06:30Z')

        b = np.datetime64('2010-02-15T06:30Z', 'm')

        assert_equal(np.datetime_as_string(a, timezone=tz('US/Central')),
                     '2010-03-15T01:30-0500')
        assert_equal(np.datetime_as_string(a, timezone=tz('US/Eastern')),
                     '2010-03-15T02:30-0400')
        assert_equal(np.datetime_as_string(a, timezone=tz('US/Pacific')),
                     '2010-03-14T23:30-0700')

        assert_equal(np.datetime_as_string(b, timezone=tz('US/Central')),
                     '2010-02-15T00:30-0600')
        assert_equal(np.datetime_as_string(b, timezone=tz('US/Eastern')),
                     '2010-02-15T01:30-0500')
        assert_equal(np.datetime_as_string(b, timezone=tz('US/Pacific')),
                     '2010-02-14T22:30-0800')

        # Dates to strings with a timezone attached is disabled by default
        assert_raises(TypeError, np.datetime_as_string, a, unit='D',
                           timezone=tz('US/Pacific'))
        # Check that we can print out the date in the specified time zone
        assert_equal(np.datetime_as_string(a, unit='D',
                           timezone=tz('US/Pacific'), casting='unsafe'),
                     '2010-03-14')
        assert_equal(np.datetime_as_string(b, unit='D',
                           timezone=tz('US/Central'), casting='unsafe'),
                     '2010-02-15')