# http://pyrocko.org - GPLv3
#
# The Pyrocko Developers, 21st Century
# ---|P------/S----------~Lg----------
'''
Data model and content types handled by the Squirrel framework.
Squirrel uses flat content types to represent waveform, station, channel,
response, event, and a few other objects. A common subset of the information in
these objects is indexed in the database, currently: kind, codes, time interval
and sampling rate. The :py:class:`Nut` objects encapsulate this information
together with information about where and how to get the associated bulk data.
Further content types are defined here to handle waveform orders, waveform
promises, data coverage and sensor information.
'''
from __future__ import absolute_import, print_function
import re
import fnmatch
import hashlib
import numpy as num
from os import urandom
from base64 import urlsafe_b64encode
from collections import defaultdict, namedtuple
from pyrocko import util
from pyrocko.guts import Object, SObject, String, Timestamp, Float, Int, \
Unicode, Tuple, List, StringChoice, Any, Dict
from pyrocko.model import squirrel_content, Location
from pyrocko.response import FrequencyResponse, MultiplyResponse, \
IntegrationResponse, DifferentiationResponse, simplify_responses, \
FrequencyResponseCheckpoint
from .error import ConversionError, SquirrelError
guts_prefix = 'squirrel'
g_codes_pool = {}
[docs]class CodesError(SquirrelError):
pass
[docs]class Codes(SObject):
pass
def normalize_nslce(*args, **kwargs):
if args and kwargs:
raise ValueError('Either *args or **kwargs accepted, not both.')
if len(args) == 1:
if isinstance(args[0], str):
args = tuple(args[0].split('.'))
elif isinstance(args[0], tuple):
args = args[0]
else:
raise ValueError('Invalid argument type: %s' % type(args[0]))
nargs = len(args)
if nargs == 5:
t = args
elif nargs == 4:
t = args + ('',)
elif nargs == 0:
d = dict(
network='',
station='',
location='',
channel='',
extra='')
d.update(kwargs)
t = tuple(kwargs.get(k, '') for k in (
'network', 'station', 'location', 'channel', 'extra'))
else:
raise CodesError(
'Does not match NSLC or NSLCE codes pattern: %s' % '.'.join(args))
if '.'.join(t).count('.') != 4:
raise CodesError(
'Codes may not contain a ".": "%s", "%s", "%s", "%s", "%s"' % t)
return t
CodesNSLCEBase = namedtuple(
'CodesNSLCEBase', [
'network', 'station', 'location', 'channel', 'extra'])
[docs]class CodesNSLCE(CodesNSLCEBase, Codes):
'''
Codes denominating a seismic channel (NSLC or NSLCE).
FDSN/SEED style NET.STA.LOC.CHA is accepted or NET.STA.LOC.CHA.EXTRA, where
the EXTRA part in the latter form can be used to identify a custom
processing applied to a channel.
'''
__slots__ = ()
__hash__ = CodesNSLCEBase.__hash__
as_dict = CodesNSLCEBase._asdict
def __new__(cls, *args, safe_str=None, **kwargs):
nargs = len(args)
if nargs == 1 and isinstance(args[0], CodesNSLCE):
return args[0]
elif nargs == 1 and isinstance(args[0], CodesNSL):
t = (args[0].nsl) + ('*', '*')
elif nargs == 1 and isinstance(args[0], CodesX):
t = ('*', '*', '*', '*', '*')
elif safe_str is not None:
t = safe_str.split('.')
else:
t = normalize_nslce(*args, **kwargs)
x = CodesNSLCEBase.__new__(cls, *t)
return g_codes_pool.setdefault(x, x)
def __init__(self, *args, **kwargs):
Codes.__init__(self)
def __str__(self):
if self.extra == '':
return '.'.join(self[:-1])
else:
return '.'.join(self)
def __eq__(self, other):
if not isinstance(other, CodesNSLCE):
other = CodesNSLCE(other)
return CodesNSLCEBase.__eq__(self, other)
@property
def safe_str(self):
return '.'.join(self)
@property
def nslce(self):
return self[:5]
@property
def nslc(self):
return self[:4]
@property
def nsl(self):
return self[:3]
@property
def ns(self):
return self[:2]
@property
def codes_nsl(self):
return CodesNSL(self)
@property
def codes_nsl_star(self):
return CodesNSL(self.network, self.station, '*')
def as_tuple(self):
return tuple(self)
def replace(self, **kwargs):
x = CodesNSLCEBase._replace(self, **kwargs)
return g_codes_pool.setdefault(x, x)
def normalize_nsl(*args, **kwargs):
if args and kwargs:
raise ValueError('Either *args or **kwargs accepted, not both.')
if len(args) == 1:
if isinstance(args[0], str):
args = tuple(args[0].split('.'))
elif isinstance(args[0], tuple):
args = args[0]
else:
raise ValueError('Invalid argument type: %s' % type(args[0]))
nargs = len(args)
if nargs == 3:
t = args
elif nargs == 0:
d = dict(
network='',
station='',
location='')
d.update(kwargs)
t = tuple(kwargs.get(k, '') for k in (
'network', 'station', 'location'))
else:
raise CodesError(
'Does not match NSL codes pattern: %s' % '.'.join(args))
if '.'.join(t).count('.') != 2:
raise CodesError(
'Codes may not contain a ".": "%s", "%s", "%s"' % t)
return t
CodesNSLBase = namedtuple(
'CodesNSLBase', [
'network', 'station', 'location'])
[docs]class CodesNSL(CodesNSLBase, Codes):
'''
Codes denominating a seismic station (NSL).
NET.STA.LOC is accepted, slightly different from SEED/StationXML, where
LOC is part of the channel. By setting location='*' is possible to get
compatible behaviour in most cases.
'''
__slots__ = ()
__hash__ = CodesNSLBase.__hash__
as_dict = CodesNSLBase._asdict
def __new__(cls, *args, safe_str=None, **kwargs):
nargs = len(args)
if nargs == 1 and isinstance(args[0], CodesNSL):
return args[0]
elif nargs == 1 and isinstance(args[0], CodesNSLCE):
t = args[0].nsl
elif nargs == 1 and isinstance(args[0], CodesX):
t = ('*', '*', '*')
elif safe_str is not None:
t = safe_str.split('.')
else:
t = normalize_nsl(*args, **kwargs)
x = CodesNSLBase.__new__(cls, *t)
return g_codes_pool.setdefault(x, x)
def __init__(self, *args, **kwargs):
Codes.__init__(self)
def __str__(self):
return '.'.join(self)
def __eq__(self, other):
if not isinstance(other, CodesNSL):
other = CodesNSL(other)
return CodesNSLBase.__eq__(self, other)
@property
def safe_str(self):
return '.'.join(self)
@property
def ns(self):
return self[:2]
@property
def nsl(self):
return self[:3]
def as_tuple(self):
return tuple(self)
def replace(self, **kwargs):
x = CodesNSLBase._replace(self, **kwargs)
return g_codes_pool.setdefault(x, x)
CodesXBase = namedtuple(
'CodesXBase', [
'name'])
[docs]class CodesX(CodesXBase, Codes):
'''
General purpose codes for anything other than channels or stations.
'''
__slots__ = ()
__hash__ = CodesXBase.__hash__
__eq__ = CodesXBase.__eq__
as_dict = CodesXBase._asdict
def __new__(cls, name='', safe_str=None):
if isinstance(name, CodesX):
return name
elif isinstance(name, (CodesNSLCE, CodesNSL)):
name = '*'
elif safe_str is not None:
name = safe_str
else:
if '.' in name:
raise CodesError('Code may not contain a ".": %s' % name)
x = CodesXBase.__new__(cls, name)
return g_codes_pool.setdefault(x, x)
def __init__(self, *args, **kwargs):
Codes.__init__(self)
def __str__(self):
return '.'.join(self)
@property
def safe_str(self):
return '.'.join(self)
@property
def ns(self):
return self[:2]
def as_tuple(self):
return tuple(self)
def replace(self, **kwargs):
x = CodesXBase._replace(self, **kwargs)
return g_codes_pool.setdefault(x, x)
g_codes_patterns = {}
def match_codes(pattern, codes):
spattern = pattern.safe_str
scodes = codes.safe_str
if spattern not in g_codes_patterns:
rpattern = re.compile(fnmatch.translate(spattern), re.I)
g_codes_patterns[spattern] = rpattern
rpattern = g_codes_patterns[spattern]
return bool(rpattern.match(scodes))
g_content_kinds = [
'undefined',
'waveform',
'station',
'channel',
'response',
'event',
'waveform_promise']
g_codes_classes = [
CodesX,
CodesNSLCE,
CodesNSL,
CodesNSLCE,
CodesNSLCE,
CodesX,
CodesNSLCE]
g_codes_classes_ndot = {
0: CodesX,
2: CodesNSL,
3: CodesNSLCE,
4: CodesNSLCE}
def to_codes_simple(kind_id, codes_safe_str):
return g_codes_classes[kind_id](safe_str=codes_safe_str)
def to_codes(kind_id, obj):
return g_codes_classes[kind_id](obj)
def to_codes_guess(s):
try:
return g_codes_classes_ndot[s.count('.')](s)
except KeyError:
raise CodesError('Cannot guess codes type: %s' % s)
# derived list class to enable detection of already preprocessed codes patterns
class codes_patterns_list(list):
pass
def codes_patterns_for_kind(kind_id, codes):
if isinstance(codes, codes_patterns_list):
return codes
if isinstance(codes, list):
lcodes = codes_patterns_list()
for sc in codes:
lcodes.extend(codes_patterns_for_kind(kind_id, sc))
return lcodes
codes = to_codes(kind_id, codes)
lcodes = codes_patterns_list()
lcodes.append(codes)
if kind_id == STATION:
lcodes.append(codes.replace(location='[*]'))
return lcodes
g_content_kind_ids = (
UNDEFINED, WAVEFORM, STATION, CHANNEL, RESPONSE, EVENT,
WAVEFORM_PROMISE) = range(len(g_content_kinds))
g_tmin, g_tmax = util.get_working_system_time_range()[:2]
try:
g_tmin_queries = max(g_tmin, util.str_to_time_fillup('1900-01-01'))
except Exception:
g_tmin_queries = g_tmin
def to_kind(kind_id):
return g_content_kinds[kind_id]
def to_kinds(kind_ids):
return [g_content_kinds[kind_id] for kind_id in kind_ids]
def to_kind_id(kind):
return g_content_kinds.index(kind)
def to_kind_ids(kinds):
return [g_content_kinds.index(kind) for kind in kinds]
g_kind_mask_all = 0xff
def to_kind_mask(kinds):
if kinds:
return sum(1 << kind_id for kind_id in to_kind_ids(kinds))
else:
return g_kind_mask_all
def str_or_none(x):
if x is None:
return None
else:
return str(x)
def float_or_none(x):
if x is None:
return None
else:
return float(x)
def int_or_none(x):
if x is None:
return None
else:
return int(x)
def int_or_g_tmin(x):
if x is None:
return g_tmin
else:
return int(x)
def int_or_g_tmax(x):
if x is None:
return g_tmax
else:
return int(x)
def tmin_or_none(x):
if x == g_tmin:
return None
else:
return x
def tmax_or_none(x):
if x == g_tmax:
return None
else:
return x
def time_or_none_to_str(x):
if x is None:
return '...'.ljust(17)
else:
return util.time_to_str(x)
def codes_to_str_abbreviated(codes, indent=' '):
codes = [str(x) for x in codes]
if len(codes) > 20:
scodes = '\n' + util.ewrap(codes[:10], indent=indent) \
+ '\n%s[%i more]\n' % (indent, len(codes) - 20) \
+ util.ewrap(codes[-10:], indent=' ')
else:
scodes = '\n' + util.ewrap(codes, indent=indent) \
if codes else '<none>'
return scodes
g_offset_time_unit_inv = 1000000000
g_offset_time_unit = 1.0 / g_offset_time_unit_inv
def tsplit(t):
if t is None:
return None, 0
t = util.to_time_float(t)
if type(t) is float:
t = round(t, 5)
else:
t = round(t, 9)
seconds = num.floor(t)
offset = t - seconds
return int(seconds), int(round(offset * g_offset_time_unit_inv))
def tjoin(seconds, offset):
if seconds is None:
return None
return util.to_time_float(seconds) \
+ util.to_time_float(offset*g_offset_time_unit)
tscale_min = 1
tscale_max = 365 * 24 * 3600 # last edge is one above
tscale_logbase = 20
tscale_edges = [tscale_min]
while True:
tscale_edges.append(tscale_edges[-1]*tscale_logbase)
if tscale_edges[-1] >= tscale_max:
break
tscale_edges = num.array(tscale_edges)
def tscale_to_kscale(tscale):
# 0 <= x < tscale_edges[1]: 0
# tscale_edges[1] <= x < tscale_edges[2]: 1
# ...
# tscale_edges[len(tscale_edges)-1] <= x: len(tscale_edges)
return int(num.searchsorted(tscale_edges, tscale))
[docs]@squirrel_content
class Station(Location):
'''
A seismic station.
'''
codes = CodesNSL.T()
tmin = Timestamp.T(optional=True)
tmax = Timestamp.T(optional=True)
description = Unicode.T(optional=True)
def __init__(self, **kwargs):
kwargs['codes'] = CodesNSL(kwargs['codes'])
Location.__init__(self, **kwargs)
@property
def time_span(self):
return (self.tmin, self.tmax)
def get_pyrocko_station(self):
from pyrocko import model
return model.Station(*self._get_pyrocko_station_args())
def _get_pyrocko_station_args(self):
return (
self.codes.network,
self.codes.station,
self.codes.location,
self.lat,
self.lon,
self.elevation,
self.depth,
self.north_shift,
self.east_shift)
[docs]class Sensor(Location):
'''
Representation of a channel group.
'''
codes = CodesNSLCE.T()
tmin = Timestamp.T(optional=True)
tmax = Timestamp.T(optional=True)
deltat = Float.T(optional=True)
@property
def time_span(self):
return (self.tmin, self.tmax)
def __init__(self, **kwargs):
kwargs['codes'] = CodesNSLCE(kwargs['codes'])
Location.__init__(self, **kwargs)
def _get_sensor_args(self):
def getattr_rep(k):
if k == 'codes':
return self.codes.replace(
channel=self.codes.channel[:-1] + '?')
else:
return getattr(self, k)
return tuple(getattr_rep(k) for k in Sensor.T.propnames)
@classmethod
def from_channels(cls, channels):
groups = defaultdict(list)
for channel in channels:
groups[channel._get_sensor_args()].append(channel)
return [
cls(**dict((k, v) for (k, v) in zip(cls.T.propnames, args)))
for args, _ in groups.items()]
def _get_pyrocko_station_args(self):
return (
self.codes.network,
self.codes.station,
self.codes.location,
self.lat,
self.lon,
self.elevation,
self.depth,
self.north_shift,
self.east_shift)
[docs]@squirrel_content
class Channel(Sensor):
'''
A channel of a seismic station.
'''
dip = Float.T(optional=True)
azimuth = Float.T(optional=True)
@classmethod
def from_channels(cls, channels):
raise NotImplementedError()
def get_pyrocko_channel(self):
from pyrocko import model
return model.Channel(*self._get_pyrocko_channel_args())
def _get_pyrocko_channel_args(self):
return (
self.codes.channel,
self.azimuth,
self.dip)
observational_quantities = [
'acceleration', 'velocity', 'displacement', 'pressure', 'rotation',
'temperature']
technical_quantities = [
'voltage', 'counts']
class QuantityType(StringChoice):
'''
Choice of observational or technical quantity.
SI units are used for all quantities, where applicable.
'''
choices = observational_quantities + technical_quantities
class ResponseStage(Object):
'''
Representation of a response stage.
Components of a seismic recording system are represented as a sequence of
response stages, e.g. sensor, pre-amplifier, digitizer, digital
downsampling.
'''
input_quantity = QuantityType.T(optional=True)
input_sample_rate = Float.T(optional=True)
output_quantity = QuantityType.T(optional=True)
output_sample_rate = Float.T(optional=True)
elements = List.T(FrequencyResponse.T())
log = List.T(Tuple.T(3, String.T()))
@property
def stage_type(self):
if self.input_quantity in observational_quantities \
and self.output_quantity in observational_quantities:
return 'conversion'
if self.input_quantity in observational_quantities \
and self.output_quantity == 'voltage':
return 'sensor'
elif self.input_quantity == 'voltage' \
and self.output_quantity == 'voltage':
return 'electronics'
elif self.input_quantity == 'voltage' \
and self.output_quantity == 'counts':
return 'digitizer'
elif self.input_quantity == 'counts' \
and self.output_quantity == 'counts' \
and self.input_sample_rate != self.output_sample_rate:
return 'decimation'
elif self.input_quantity in observational_quantities \
and self.output_quantity == 'counts':
return 'combination'
else:
return 'unknown'
@property
def summary(self):
irate = self.input_sample_rate
orate = self.output_sample_rate
factor = None
if irate and orate:
factor = irate / orate
return 'ResponseStage, ' + (
'%s%s => %s%s%s' % (
self.input_quantity or '?',
' @ %g Hz' % irate if irate else '',
self.output_quantity or '?',
' @ %g Hz' % orate if orate else '',
' :%g' % factor if factor else '')
)
def get_effective(self):
return MultiplyResponse(responses=list(self.elements))
D = 'displacement'
V = 'velocity'
A = 'acceleration'
g_converters = {
(V, D): IntegrationResponse(1),
(A, D): IntegrationResponse(2),
(D, V): DifferentiationResponse(1),
(A, V): IntegrationResponse(1),
(D, A): DifferentiationResponse(2),
(V, A): DifferentiationResponse(1)}
def response_converters(input_quantity, output_quantity):
if input_quantity is None or input_quantity == output_quantity:
return []
if output_quantity is None:
raise ConversionError('Unspecified target quantity.')
try:
return [g_converters[input_quantity, output_quantity]]
except KeyError:
raise ConversionError('No rule to convert from "%s" to "%s".' % (
input_quantity, output_quantity))
[docs]@squirrel_content
class Response(Object):
'''
The instrument response of a seismic station channel.
'''
codes = CodesNSLCE.T()
tmin = Timestamp.T(optional=True)
tmax = Timestamp.T(optional=True)
stages = List.T(ResponseStage.T())
checkpoints = List.T(FrequencyResponseCheckpoint.T())
deltat = Float.T(optional=True)
log = List.T(Tuple.T(3, String.T()))
def __init__(self, **kwargs):
kwargs['codes'] = CodesNSLCE(kwargs['codes'])
Object.__init__(self, **kwargs)
@property
def time_span(self):
return (self.tmin, self.tmax)
@property
def nstages(self):
return len(self.stages)
@property
def input_quantity(self):
return self.stages[0].input_quantity if self.stages else None
@property
def output_quantity(self):
return self.stages[-1].input_quantity if self.stages else None
@property
def output_sample_rate(self):
return self.stages[-1].output_sample_rate if self.stages else None
@property
def stages_summary(self):
def grouped(xs):
xs = list(xs)
g = []
for i in range(len(xs)):
g.append(xs[i])
if i+1 < len(xs) and xs[i+1] != xs[i]:
yield g
g = []
if g:
yield g
return '+'.join(
'%s%s' % (g[0], '(%i)' % len(g) if len(g) > 1 else '')
for g in grouped(stage.stage_type for stage in self.stages))
@property
def summary(self):
orate = self.output_sample_rate
return '%s %-16s %s' % (
self.__class__.__name__, self.str_codes, self.str_time_span) \
+ ', ' + ', '.join((
'%s => %s' % (
self.input_quantity or '?', self.output_quantity or '?')
+ (' @ %g Hz' % orate if orate else ''),
self.stages_summary,
))
def get_effective(self, input_quantity=None):
try:
elements = response_converters(input_quantity, self.input_quantity)
except ConversionError as e:
raise ConversionError(str(e) + ' (%s)' % self.summary)
elements.extend(
stage.get_effective() for stage in self.stages)
return MultiplyResponse(responses=simplify_responses(elements))
@squirrel_content
class Event(Object):
'''
A seismic event.
'''
name = String.T(optional=True)
time = Timestamp.T()
duration = Float.T(optional=True)
lat = Float.T()
lon = Float.T()
depth = Float.T(optional=True)
magnitude = Float.T(optional=True)
def get_pyrocko_event(self):
from pyrocko import model
model.Event(
name=self.name,
time=self.time,
lat=self.lat,
lon=self.lon,
depth=self.depth,
magnitude=self.magnitude,
duration=self.duration)
@property
def time_span(self):
return (self.time, self.time)
def ehash(s):
return hashlib.sha1(s.encode('utf8')).hexdigest()
def random_name(n=8):
return urlsafe_b64encode(urandom(n)).rstrip(b'=').decode('ascii')
class InvalidWaveform(Exception):
pass
class WaveformOrder(Object):
'''
Waveform request information.
'''
source_id = String.T()
codes = CodesNSLCE.T()
deltat = Float.T()
tmin = Timestamp.T()
tmax = Timestamp.T()
gaps = List.T(Tuple.T(2, Timestamp.T()))
@property
def client(self):
return self.source_id.split(':')[1]
def describe(self, site='?'):
return '%s:%s %s [%s - %s]' % (
self.client, site, str(self.codes),
util.time_to_str(self.tmin), util.time_to_str(self.tmax))
def validate(self, tr):
if tr.ydata.size == 0:
raise InvalidWaveform(
'waveform with zero data samples')
if tr.deltat != self.deltat:
raise InvalidWaveform(
'incorrect sampling interval - waveform: %g s, '
'meta-data: %g s' % (
tr.deltat, self.deltat))
if not num.all(num.isfinite(tr.ydata)):
raise InvalidWaveform('waveform has NaN values')
def order_summary(orders):
codes_list = sorted(set(order.codes for order in orders))
if len(codes_list) > 3:
return '%i order%s: %s - %s' % (
len(orders),
util.plural_s(orders),
str(codes_list[0]),
str(codes_list[1]))
else:
return '%i order%s: %s' % (
len(orders),
util.plural_s(orders),
', '.join(str(codes) for codes in codes_list))
[docs]class Nut(Object):
'''
Index entry referencing an elementary piece of content.
So-called *nuts* are used in Pyrocko's Squirrel framework to hold common
meta-information about individual pieces of waveforms, stations, channels,
etc. together with the information where it was found or generated.
'''
file_path = String.T(optional=True)
file_format = String.T(optional=True)
file_mtime = Timestamp.T(optional=True)
file_size = Int.T(optional=True)
file_segment = Int.T(optional=True)
file_element = Int.T(optional=True)
kind_id = Int.T()
codes = Codes.T()
tmin_seconds = Int.T(default=0)
tmin_offset = Int.T(default=0, optional=True)
tmax_seconds = Int.T(default=0)
tmax_offset = Int.T(default=0, optional=True)
deltat = Float.T(default=0.0)
content = Any.T(optional=True)
raw_content = Dict.T(String.T(), Any.T())
content_in_db = False
def __init__(
self,
file_path=None,
file_format=None,
file_mtime=None,
file_size=None,
file_segment=None,
file_element=None,
kind_id=0,
codes=CodesX(''),
tmin_seconds=None,
tmin_offset=0,
tmax_seconds=None,
tmax_offset=0,
deltat=None,
content=None,
raw_content=None,
tmin=None,
tmax=None,
values_nocheck=None):
if values_nocheck is not None:
(self.file_path, self.file_format, self.file_mtime,
self.file_size,
self.file_segment, self.file_element,
self.kind_id, codes_safe_str,
self.tmin_seconds, self.tmin_offset,
self.tmax_seconds, self.tmax_offset,
self.deltat) = values_nocheck
self.codes = to_codes_simple(self.kind_id, codes_safe_str)
self.deltat = self.deltat or None
self.raw_content = {}
self.content = None
else:
if tmin is not None:
tmin_seconds, tmin_offset = tsplit(tmin)
if tmax is not None:
tmax_seconds, tmax_offset = tsplit(tmax)
self.kind_id = int(kind_id)
self.codes = codes
self.tmin_seconds = int_or_g_tmin(tmin_seconds)
self.tmin_offset = int(tmin_offset)
self.tmax_seconds = int_or_g_tmax(tmax_seconds)
self.tmax_offset = int(tmax_offset)
self.deltat = float_or_none(deltat)
self.file_path = str_or_none(file_path)
self.file_segment = int_or_none(file_segment)
self.file_element = int_or_none(file_element)
self.file_format = str_or_none(file_format)
self.file_mtime = float_or_none(file_mtime)
self.file_size = int_or_none(file_size)
self.content = content
if raw_content is None:
self.raw_content = {}
else:
self.raw_content = raw_content
Object.__init__(self, init_props=False)
def __eq__(self, other):
return (isinstance(other, Nut) and
self.equality_values == other.equality_values)
def hash(self):
return ehash(','.join(str(x) for x in self.key))
def __ne__(self, other):
return not (self == other)
def get_io_backend(self):
from . import io
return io.get_backend(self.file_format)
def file_modified(self):
return self.get_io_backend().get_stats(self.file_path) \
!= (self.file_mtime, self.file_size)
@property
def dkey(self):
return (self.kind_id, self.tmin_seconds, self.tmin_offset, self.codes)
@property
def key(self):
return (
self.file_path,
self.file_segment,
self.file_element,
self.file_mtime)
@property
def equality_values(self):
return (
self.file_segment, self.file_element,
self.kind_id, self.codes,
self.tmin_seconds, self.tmin_offset,
self.tmax_seconds, self.tmax_offset, self.deltat)
def diff(self, other):
names = [
'file_segment', 'file_element', 'kind_id', 'codes',
'tmin_seconds', 'tmin_offset', 'tmax_seconds', 'tmax_offset',
'deltat']
d = []
for name, a, b in zip(
names, self.equality_values, other.equality_values):
if a != b:
d.append((name, a, b))
return d
@property
def tmin(self):
return tjoin(self.tmin_seconds, self.tmin_offset)
@tmin.setter
def tmin(self, t):
self.tmin_seconds, self.tmin_offset = tsplit(t)
@property
def tmax(self):
return tjoin(self.tmax_seconds, self.tmax_offset)
@tmax.setter
def tmax(self, t):
self.tmax_seconds, self.tmax_offset = tsplit(t)
@property
def kscale(self):
if self.tmin_seconds is None or self.tmax_seconds is None:
return 0
return tscale_to_kscale(self.tmax_seconds - self.tmin_seconds)
@property
def waveform_kwargs(self):
network, station, location, channel, extra = self.codes
return dict(
network=network,
station=station,
location=location,
channel=channel,
extra=extra,
tmin=self.tmin,
tmax=self.tmax,
deltat=self.deltat)
@property
def waveform_promise_kwargs(self):
return dict(
codes=self.codes,
tmin=self.tmin,
tmax=self.tmax,
deltat=self.deltat)
@property
def station_kwargs(self):
network, station, location = self.codes
return dict(
codes=self.codes,
tmin=tmin_or_none(self.tmin),
tmax=tmax_or_none(self.tmax))
@property
def channel_kwargs(self):
network, station, location, channel, extra = self.codes
return dict(
codes=self.codes,
tmin=tmin_or_none(self.tmin),
tmax=tmax_or_none(self.tmax),
deltat=self.deltat)
@property
def response_kwargs(self):
return dict(
codes=self.codes,
tmin=tmin_or_none(self.tmin),
tmax=tmax_or_none(self.tmax),
deltat=self.deltat)
@property
def event_kwargs(self):
return dict(
name=self.codes,
time=self.tmin,
duration=(self.tmax - self.tmin) or None)
@property
def trace_kwargs(self):
network, station, location, channel, extra = self.codes
return dict(
network=network,
station=station,
location=location,
channel=channel,
extra=extra,
tmin=self.tmin,
tmax=self.tmax-self.deltat,
deltat=self.deltat)
@property
def dummy_trace(self):
return DummyTrace(self)
@property
def summary(self):
if self.tmin == self.tmax:
ts = util.time_to_str(self.tmin)
else:
ts = '%s - %s' % (
util.time_to_str(self.tmin),
util.time_to_str(self.tmax))
return ' '.join((
('%s,' % to_kind(self.kind_id)).ljust(9),
('%s,' % str(self.codes)).ljust(18),
ts))
def make_waveform_nut(**kwargs):
return Nut(kind_id=WAVEFORM, **kwargs)
def make_waveform_promise_nut(**kwargs):
return Nut(kind_id=WAVEFORM_PROMISE, **kwargs)
def make_station_nut(**kwargs):
return Nut(kind_id=STATION, **kwargs)
def make_channel_nut(**kwargs):
return Nut(kind_id=CHANNEL, **kwargs)
def make_response_nut(**kwargs):
return Nut(kind_id=RESPONSE, **kwargs)
def make_event_nut(**kwargs):
return Nut(kind_id=EVENT, **kwargs)
def group_channels(nuts):
by_ansl = {}
for nut in nuts:
if nut.kind_id != CHANNEL:
continue
ansl = nut.codes[:4]
if ansl not in by_ansl:
by_ansl[ansl] = {}
group = by_ansl[ansl]
k = nut.codes[4][:-1], nut.deltat, nut.tmin, nut.tmax
if k not in group:
group[k] = set()
group.add(nut.codes[4])
return by_ansl
class DummyTrace(object):
def __init__(self, nut):
self.nut = nut
self.codes = nut.codes
self.meta = {}
@property
def tmin(self):
return self.nut.tmin
@property
def tmax(self):
return self.nut.tmax
@property
def deltat(self):
return self.nut.deltat
@property
def nslc_id(self):
return self.codes.nslc
@property
def network(self):
return self.codes.network
@property
def station(self):
return self.codes.station
@property
def location(self):
return self.codes.location
@property
def channel(self):
return self.codes.channel
@property
def extra(self):
return self.codes.extra
def overlaps(self, tmin, tmax):
return not (tmax < self.nut.tmin or self.nut.tmax < tmin)
def duration_to_str(t):
if t > 24*3600:
return '%gd' % (t / (24.*3600.))
elif t > 3600:
return '%gh' % (t / 3600.)
elif t > 60:
return '%gm' % (t / 60.)
else:
return '%gs' % t
[docs]class Coverage(Object):
'''
Information about times covered by a waveform or other time series data.
'''
kind_id = Int.T(
help='Content type.')
pattern = Codes.T(
help='The codes pattern in the request, which caused this entry to '
'match.')
codes = Codes.T(
help='NSLCE or NSL codes identifier of the time series.')
deltat = Float.T(
help='Sampling interval [s]',
optional=True)
tmin = Timestamp.T(
help='Global start time of time series.',
optional=True)
tmax = Timestamp.T(
help='Global end time of time series.',
optional=True)
changes = List.T(
Tuple.T(2, Any.T()),
help='List of change points, with entries of the form '
'``(time, count)``, where a ``count`` of zero indicates start of '
'a gap, a value of 1 start of normal data coverage and a higher '
'value duplicate or redundant data coverage.')
@classmethod
def from_values(cls, args):
pattern, codes, deltat, tmin, tmax, changes, kind_id = args
return cls(
kind_id=kind_id,
pattern=pattern,
codes=codes,
deltat=deltat,
tmin=tmin,
tmax=tmax,
changes=changes)
@property
def summary(self):
ts = '%s - %s,' % (
util.time_to_str(self.tmin),
util.time_to_str(self.tmax))
srate = self.sample_rate
return ' '.join((
('%s,' % to_kind(self.kind_id)).ljust(9),
('%s,' % str(self.codes)).ljust(18),
ts,
'%10.3g,' % srate if srate else '',
'%4i' % len(self.changes),
'%s' % duration_to_str(self.total)))
@property
def sample_rate(self):
if self.deltat is None:
return None
elif self.deltat == 0.0:
return 0.0
else:
return 1.0 / self.deltat
@property
def labels(self):
srate = self.sample_rate
return (
('%s' % str(self.codes)),
'%.3g' % srate if srate else '')
@property
def total(self):
total_t = None
for tmin, tmax, _ in self.iter_spans():
total_t = (total_t or 0.0) + (tmax - tmin)
return total_t
def iter_spans(self):
last = None
for (t, count) in self.changes:
if last is not None:
last_t, last_count = last
if last_count > 0:
yield last_t, t, last_count
last = (t, count)
class LocationPool(object):
def __init__(self, squirrel, tmin, tmax):
locations = {}
for station in squirrel.get_stations(tmin=tmin, tmax=tmax):
c = station.codes
if c not in locations:
locations[c] = station
else:
if locations[c] is not None \
and not locations[c].same_location(station):
locations[c] = None
for channel in squirrel.get_channels(tmin=tmin, tmax=tmax):
c = channel.codes
if c not in locations:
locations[c] = channel
else:
if locations[c] is not None \
and not locations[c].same_location(channel):
locations[c] = None
self._locations = locations
def get(self, codes):
try:
return self._locations[codes]
except KeyError:
pass
try:
return self._locations[codes.codes_nsl]
except KeyError:
pass
try:
return self._locations[codes.codes_nsl_star]
except KeyError:
return None
__all__ = [
'to_codes',
'to_codes_guess',
'to_codes_simple',
'to_kind',
'to_kinds',
'to_kind_id',
'to_kind_ids',
'CodesError',
'Codes',
'CodesNSLCE',
'CodesNSL',
'CodesX',
'Station',
'Channel',
'Sensor',
'Response',
'Nut',
'Coverage',
'WaveformPromise',
]
