示例#1
0
文件: test_table.py 项目: e-q/gwpy
 def test_recarray_read(self):
     tablename = lsctables.strip_table_name(self.TABLE_CLASS.tableName)
     # simple
     table = GWRecArray.read(self.TEST_XML_FILE, format=tablename)
     self.assertEquals(len(table), 2052)
     # nproc
     table = GWRecArray.read(self.TEST_XML_FILE, format=tablename, nproc=2)
     # get_as_column
     table = GWRecArray.read(self.TEST_XML_FILE, format=tablename,
                             get_as_columns=True)
示例#2
0
文件: test_table.py 项目: e-q/gwpy
 def test_get_table_row_methods(self):
     testfile = SnglBurstTableTestCase.TEST_XML_FILE
     table = GWRecArray.read(SnglBurstTableTestCase.TEST_XML_FILE,
                             format='sngl_burst')
     # test simple column
     snr = get_table_column(table, 'snr')
     nptest.assert_array_equal(snr, table['snr'])
     # test 'time' special-case
     time = get_table_column(table, 'time')
     nptest.assert_array_equal(
         time, table['peak_time'] + table['peak_time_ns'] * 1e-9)
     # test row
     row = table[0]
     self.assertEqual(get_row_value(row, 'snr'), row['snr'])
     self.assertEqual(get_row_value(row, 'time'),
                      row['peak_time'] + row['peak_time_ns'] * 1e-9)
示例#3
0
def get_triggers(channel, etg, segments, config=GWSummConfigParser(),
                 cache=None, columns=None, query=True, multiprocess=False,
                 ligolwtable=None, return_=True):
    """Read a table of transient event triggers for a given channel.
    """
    key = '%s,%s' % (str(channel), etg.lower())

    # convert input segments to a segmentlist (for convenience)
    if isinstance(segments, DataQualityFlag):
        segments = segments.active
    segments = SegmentList(segments)

    # get processes
    if multiprocess is True:
        nproc = count_free_cores()
    elif multiprocess is False:
        nproc = 1
    else:
        nproc = multiprocess

    # find LIGO_LW table for this ETG
    try:
        TableClass = get_etg_table(etg)
    except KeyError:
        TableClass = None

    # work out columns
    if columns is None:
        try:
            columns = config.get(etg, 'columns').split(',')
        except (NoSectionError, NoOptionError):
            columns = None

    # read segments from global memory
    try:
        havesegs = globalv.TRIGGERS[key].segments
    except KeyError:
        new = segments
    else:
        new = segments - havesegs

    # read new triggers
    if query and abs(new) != 0:
        ntrigs = 0
        vprint("    Grabbing %s triggers for %s" % (etg, str(channel)))

        # store read kwargs
        kwargs = get_etg_read_kwargs(config, etg, exclude=['columns'])
        kwargs['columns'] = columns
        if etg.lower().replace('-', '_') in ['cwb', 'pycbc_live']:
            kwargs['ifo'] = get_channel(channel).ifo
        if 'format' not in kwargs and 'ahope' not in etg.lower():
            kwargs['format'] = etg.lower()

        # set up ligolw options if needed
        if TableClass is not None:
            contenthandler = get_partial_contenthandler(TableClass)
            lsctables.use_in(contenthandler)

        # loop over segments
        for segment in new:
            # find trigger files
            if cache is None and etg.lower() == 'hacr':
                raise NotImplementedError("HACR parsing has not been "
                                          "implemented.")
            if cache is None and etg.lower() in ['kw', 'kleinewelle']:
                kwargs['filt'] = lambda t: t.channel == str(channel)
            if cache is None:
                try:
                    segcache = trigfind.find_trigger_urls(str(channel), etg,
                                                          segment[0],
                                                          segment[1])
                except ValueError as e:
                    warnings.warn("Caught %s: %s" % (type(e).__name__, str(e)))
                    continue
                else:
                    for regex in TRIGFIND_FORMAT:
                        if regex.match(etg):
                            kwargs['format'] = TRIGFIND_FORMAT[regex]
                            if TRIGFIND_FORMAT[regex] in lsctables.TableByName:
                                kwargs['get_as_columns'] = True
                            break
                if etg.lower() == 'omega':
                    kwargs.setdefault('format', 'omega')
                else:
                    kwargs.setdefault('format', 'ligolw')
            else:
                segcache = cache
            if isinstance(segcache, Cache):
                segcache = segcache.sieve(segment=segment)
                segcache = segcache.checkfilesexist()[0]
                segcache.sort(key=lambda x: x.segment[0])
                if etg == 'pycbc_live':  # remove empty HDF5 files
                    segcache = type(segcache)(
                        filter_pycbc_live_files(segcache, ifo=kwargs['ifo']))
            # if no files, skip
            if len(segcache) == 0:
                continue
            # read triggers
            if kwargs.get('format', None) == 'ligolw':
                kwargs['contenthandler'] = contenthandler
            try:  # try directly reading a numpy.recarray
                table = GWRecArray.read(segcache, nproc=nproc, **kwargs)
            except Exception as e:  # back up to LIGO_LW
                if TableClass is not None and 'No reader' in str(e):
                    try:
                        table = TableClass.read(segcache, **kwargs)
                    except Exception:
                        raise e
                    else:
                        table = table.to_recarray(get_as_columns=True)
                else:
                    raise
            # append new events to existing table
            try:
                csegs = cache_segments(segcache)
            except AttributeError:
                csegs = SegmentList()
            table.segments = csegs
            t2 = keep_in_segments(table, SegmentList([segment]), etg)
            add_triggers(t2, key, csegs)
            ntrigs += len(t2)
            vprint(".")
        vprint(" | %d events read\n" % ntrigs)

    # if asked to read triggers, but didn't actually read any,
    # create an empty table so that subsequent calls don't raise KeyErrors
    if query and key not in globalv.TRIGGERS:
        if TableClass is not None:
            tab = lsctables.New(TableClass, columns=columns).to_recarray(
                get_as_columns=True)
        else:
            tab = GWRecArray((0,), dtype=[(c, float) for c in columns])
        tab.segments = SegmentList()
        add_triggers(tab, key, tab.segments)

    # work out time function
    if return_:
        return keep_in_segments(globalv.TRIGGERS[key], segments, etg)
    else:
        return