Class FrameCacheEntry
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??-602 --+
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glue.lal.CacheEntry --+
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FrameCacheEntry
An object representing one line in a frame cache file.
Each line in a frame cache identifies multiple files, and the line
consists of six columns of white-space delimited text.
The first column, "observatory", generally stores the name
of an observatory site or one or more instruments (preferably delimited
by ",", but often there is no delimiter between instrument
names).
The second column, "description", stores a short string tag
that is usually all capitals with "_" separating components, in
the style of the description part of the LIGO-Virgo frame filename
format.
The third and fourth columns store the start time and stop time in GPS
seconds of the interval spanned by the file identified by the cache
line.
The fifth column stored the duration of each frame identified in the
cache line.
The sixth (last) column stores the file's URL.
The values for these columns are stored in the .observatory,
.description, .segment and .url attributes, respectively. The .segment
attribute stores a glue.segments.segment object describing the interval
spanned by the file. Any of these attributes except the URL is allowed
to be None.
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__str__(self)
Convert the FrameCacheEntry to a string in the format of a line in a
frame cache. |
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__cmp__(self,
other)
Compare two FrameCacheEntry objects by observatory, then description,
then segment, then duration, then URL. |
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get_files(self)
Return Find all files described by this FrameCacheEntry. |
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from_T050017(cls,
url,
coltype=LIGOTimeGPS)
Parse a URL in the style of T050017-00 into a FrameCacheEntry. |
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_regex = re.compile(r"\A\s*(?P<obs>\S+)\s+(?P<dsc>\S+)\s+(?P<s...
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_url_regex = re.compile(r"\A((.*/)*(?P<obs>[^/]+)-(?P<dsc>[^/]...
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__init__(self,
*args,
**kwargs)
(Constructor)
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Intialize a FrameCacheEntry object. The arguments can take two forms:
a single string argument, which is interpreted and parsed as a line from
a frame cache file, or four arguments used to explicitly initialize the
observatory, description, segment and URL in that order. When parsing a
single line of text from a frame cache, an optional key-word argument
"coltype" can be provided to set the type the start, end and
durations are parsed as. The default is glue.lal.LIGOTimeGPS.
- Overrides:
glue.lal.CacheEntry.__init__
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__str__(self)
(Informal representation operator)
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Convert the FrameCacheEntry to a string in the format of a line in a
frame cache. Used to write the FrameCacheEntry to a file.
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from_T050017(cls,
url,
coltype=LIGOTimeGPS)
Class Method
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Parse a URL in the style of T050017-00 into a FrameCacheEntry. The
T050017-00 file name format is, essentially,
observatory-description-start-dur.ext
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_regex
- Value:
re.compile(r"\A\s*(?P<obs>\S+)\s+(?P<dsc>\S+)\s+(?P<strt>\S+)\s+(?P<en
d>\S+)\s+(?P<dur>\S+)\s+(?P<url>\S+)\s*\Z")
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_url_regex
- Value:
re.compile(r"\A((.*/)*(?P<obs>[^/]+)-(?P<dsc>[^/]+)-(?P<strt>[^/]+)-(?
P<dur>[^/\.]+)\.[^/]+)\Z")
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