build.rsudp.c_alert.Alert._set_filt() - Code Metrics - Inspection of "refactoring `Alert.__init__`" - raspishake/rsudp - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 0acd6f...3b78b5 )

by Ian

created 2020-03-23 21:13 UTC

build.rsudp.c_alert.Alert._set_filt() C

↳ Parent: build.rsudp.c_alert

Complexity

Conditions

Size

Total Lines	34
Code Lines	23

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	11
eloc	23
nop	2
dl	0
loc	34
rs	5.4
c	0
b	0
f	0

How to fix Complexity

import sys, os
from datetime import datetime, timedelta
import rsudp.raspberryshake as rs
from obspy.signal.trigger import recursive_sta_lta, trigger_onset
from rsudp import printM, printW, printE
COLOR = {}
from rsudp import COLOR
import numpy as np

# set the terminal text color to green
COLOR['current'] = COLOR['green']


class Alert(rs.ConsumerThread):
	"""
	A data consumer class that listens to a specific incoming data channel
	and calculates a recursive STA/LTA (short term average over long term 
	average). If a threshold of STA/LTA ratio is exceeded, the class
	sets the :py:data:`alarm` flag to the alarm time as a
	:py:class:`obspy.core.utcdatetime.UTCDateTime` object.
	The :py:class:`rsudp.p_producer.Producer` will see this flag
	and send an :code:`ALARM` message to the queues with the time set here.
	Likewise, when the :py:data:`alarm_reset` flag is set with a
	:py:class:`obspy.core.utcdatetime.UTCDateTime`,
	the Producer will send a :code:`RESET` message to the queues.

	:param float sta: short term average (STA) duration in seconds.
	:param float lta: long term average (LTA) duration in seconds.
	:param float thresh: threshold for STA/LTA trigger.
	:type bp: :py:class:`bool` or :py:class:`list`
	:param bp: bandpass filter parameters. if set, should be in the format ``[highpass, lowpass]``
	:param bool debug: whether or not to display max STA/LTA calculation live to the console.
	:param str cha: listening channel (defaults to [S,E]HZ)
	:param queue.Queue q: queue of data and messages sent by :class:`rsudp.c_consumer.Consumer`

	"""

	def _set_filt(self, bp):
		'''
		This function sets the filter parameters (if specified).
		Set to a boolean if not filtering, or ``[highpass, lowpass]``
		if filtering.

		:param bp: bandpass filter parameters. if set, should be in the format ``[highpass, lowpass]``
		:type bp: :py:class:`bool` or :py:class:`list`
		'''
		if bp:
			self.freqmin = bp[0]
			self.freqmax = bp[1]
			self.freq = 0
			if (bp[0] <= 0) and (bp[1] >= (self.sps/2)):
				self.filt = False
			elif (bp[0] > 0) and (bp[1] >= (self.sps/2)):
				self.filt = 'highpass'
				self.freq = bp[0]
				desc = 'low corner %s' % (bp[0])
			elif (bp[0] <= 0) and (bp[1] <= (self.sps/2)):
				self.filt = 'lowpass'
				self.freq = bp[1]
			else:
				self.filt = 'bandpass'
		else:
			self.filt = False

		if self.filt == 'bandpass':
			printM('Alert stream will be %s filtered from %s to %s Hz'
					% (self.filt, self.freqmin, self.freqmax), self.sender)
		elif self.filt in ('lowpass', 'highpass'):
			modifier = 'below' if self.filt in 'lowpass' else 'above'
			printM('Alert stream will be %s filtered %s %s Hz'
					% (self.filt, modifier, self.freq), self.sender)


	def _set_deconv(self, deconv):
		'''
		This function sets the deconvolution units. Allowed values are as follows:

		.. |ms2| replace:: m/s\ :sup:`2`\

		- ``'VEL'`` - velocity (m/s)
		- ``'ACC'`` - acceleration (|ms2|)
		- ``'GRAV'`` - fraction of acceleration due to gravity (g, or 9.81 |ms2|)
		- ``'DISP'`` - displacement (m)
		- ``'CHAN'`` - channel-specific unit calculation, i.e. ``'VEL'`` for geophone channels and ``'ACC'`` for accelerometer channels

		:param str deconv: ``'VEL'``, ``'ACC'``, ``'GRAV'``, ``'DISP'``, or ``'CHAN'``
		'''
		deconv = deconv.upper() if deconv else False
		self.deconv = self.deconv if (deconv in rs.UNITS) else False
		if self.deconv and rs.inv:
			self.units = '%s (%s)' % (rs.UNITS[0], rs.UNITS[1]) if (self.deconv in rs.UNITS) else self.units
			printM('Signal deconvolution set to %s' % (self.deconv), self.sender)
		else:
			self.units = rs.UNITS['CHAN'][1]
			self.deconv = False
		printM('Alert stream units are %s' % (self.units.strip(' ').lower()), self.sender)


	def _find_chn(self):
		'''
		Finds channel match in list of channels.
		'''
		for chn in rs.chns:
			if self.cha in chn:
				self.cha = chn


	def _set_channel(self, cha):
		'''
		This function sets the channel to listen to. Allowed values are as follows:

		- "SHZ"``, ``"EHZ"``, ``"EHN"`` or ``"EHE"`` - velocity channels
		- ``"ENZ"``, ``"ENN"``, ``"ENE"`` - acceleration channels
		- ``"HDF"`` - pressure transducer channel
		- ``"all"`` - resolves to either ``"EHZ"`` or ``"SHZ"`` if available

		:param cha: the channel to listen to
		:type cha: str
		'''
		cha = self.default_ch if (cha == 'all') else cha
		self.cha = cha if isinstance(cha, str) else cha[0]

		if self.cha in str(rs.chns):
			self._find_chn()
		else:
			printE('Could not find channel %s in list of channels! Please correct and restart.' % self.cha, self.sender)
			sys.exit(2)


	def __init__(self, sta=5, lta=30, thresh=1.6, reset=1.55, bp=False,
				 debug=True, cha='HZ', q=False, sound=False, deconv=False,
				 *args, **kwargs):
		"""
		Initializing the alert thread with parameters to set up the recursive
		STA-LTA trigger, filtering, and the channel used for listening.
		"""
		super().__init__()
		self.sender = 'Alert'
		self.alive = True

		self.queue = q

		self.default_ch = 'HZ'
		self.sta = sta
		self.lta = lta
		self.thresh = thresh
		self.reset = reset
		self.debug = debug
		self.args = args
		self.kwargs = kwargs
		self.raw = rs.Stream()
		self.stream = rs.Stream()

		self._set_channel(cha)

		self.sps = rs.sps
		self.inv = rs.inv
		self.stalta = np.ndarray(1)
		self.maxstalta = 0
		self.units = 'counts'
		
		self._set_deconv(deconv)

		self.exceed = False
		self.sound = sound
		
		self._set_filt(bp)


	def _getq(self):
		'''
		Reads data from the queue and updates the stream.

		:rtype: bool
		:return: Returns ``True`` if stream is updated, otherwise ``False``.
		'''
		d = self.queue.get(True, timeout=None)
		self.queue.task_done()
		if self.cha in str(d):
			self.raw = rs.update_stream(stream=self.raw, d=d, fill_value='latest')
			return True
		elif 'TERM' in str(d):
			self.alive = False
			printM('Exiting.', self.sender)
			sys.exit()
		else:
			return False


	def _deconvolve(self):
		'''
		Deconvolves the stream associated with this class.
		'''
		if self.deconv:
			rs.deconvolve(self)


	def _subloop(self):
		'''
		Gets the queue and figures out whether or not the specified channel is in the packet.
		'''
		while True:
			if self.queue.qsize() > 0:
				self._getq()			# get recent packets
			else:
				if self._getq():		# is this the specified channel? if so break
					break


	def _filter(self):
		'''
		Filters the stream associated with this class.
		'''
		if self.filt:
			if self.filt in 'bandpass':
				self.stalta = recursive_sta_lta(
							self.stream[0].copy().filter(type=self.filt,
							freqmin=self.freqmin, freqmax=self.freqmax),
							int(self.sta * self.sps), int(self.lta * self.sps))
			else:
				self.stalta = recursive_sta_lta(
							self.stream[0].copy().filter(type=self.filt,
							freq=self.freq),
							int(self.sta * self.sps), int(self.lta * self.sps))
		else:
			self.stalta = recursive_sta_lta(self.stream[0],
					int(self.sta * self.sps), int(self.lta * self.sps))


	def _is_trigger(self):
		'''
		Figures out it there's a trigger active.
		'''
		if self.stalta.max() > self.thresh:
			if not self.exceed:
				# raise a flag that the Producer can read and modify 
				self.alarm = rs.fsec(self.stream[0].stats.starttime + timedelta(seconds=
										trigger_onset(self.stalta, self.thresh,
										self.reset)[-1][0] * self.stream[0].stats.delta))
				self.exceed = True	# the state machine; this one should not be touched from the outside, otherwise bad things will happen
				print()
				printM('Trigger threshold of %s exceeded at %s'
						% (self.thresh, self.alarm.strftime('%Y-%m-%d %H:%M:%S.%f')[:22]), self.sender)
				printM('Trigger will reset when STA/LTA goes below %s...' % self.reset, sender=self.sender)
				COLOR['current'] = COLOR['purple']
			else:
				pass

			if self.stalta.max() > self.maxstalta:
				self.maxstalta = self.stalta.max()
		else:
			if self.exceed:
				if self.stalta[-1] < self.reset:
					self.alarm_reset = rs.fsec(self.stream[0].stats.endtime)	# lazy; effective
					self.exceed = False
					print()
					printM('Max STA/LTA ratio reached in alarm state: %s' % (round(self.maxstalta, 3)),
							self.sender)
					printM('Earthquake trigger reset and active again at %s' % (
							self.alarm_reset.strftime('%Y-%m-%d %H:%M:%S.%f')[:22]),
							self.sender)
					self.maxstalta = 0
					COLOR['current'] = COLOR['green']
			else:
				pass


	def _print_stalta(self):
		'''
		Print the current max STA/LTA of the stream.
		'''
		if self.debug:
			msg = '\r%s [%s] Threshold: %s; Current max STA/LTA: %.4f' % (
					(self.stream[0].stats.starttime + timedelta(seconds=
					 len(self.stream[0].data) * self.stream[0].stats.delta)).strftime('%Y-%m-%d %H:%M:%S'),
					self.sender,
					self.thresh,
					round(np.max(self.stalta[-50:]), 4)
					)
			print(COLOR['current'] + COLOR['bold'] + msg + COLOR['white'], end='', flush=True)


	def run(self):
		"""
		Reads data from the queue into a :class:`obspy.core.stream.Stream` object,
		then runs a :func:`obspy.signal.trigger.recursive_sta_lta` function to
		determine whether to raise an alert flag (:py:data:`rsudp.c_alert.Alert.alarm`).
		The producer reads this flag and uses it to notify other consumers.
		"""
		n = 0

		wait_pkts = (self.lta) / (rs.tf / 1000)

		while n > 3:
			self.getq()
			n += 1

		n = 0
		while True:
			self._subloop()

			self.raw = rs.copy(self.raw)	# necessary to avoid memory leak
			self.stream = self.raw.copy()
			self._deconvolve()

			if n > wait_pkts:
				# if the trigger is activated
				obstart = self.stream[0].stats.endtime - timedelta(seconds=self.lta)	# obspy time
				self.raw = self.raw.slice(starttime=obstart)		# slice the stream to the specified length (seconds variable)
				self.stream = self.stream.slice(starttime=obstart)	# slice the stream to the specified length (seconds variable)

				# filter
				self._filter()
				# figure out if the trigger has gone off
				self._is_trigger()

				# copy the stream (necessary to avoid memory leak)
				self.stream = rs.copy(self.stream)

				# print the current STA/LTA calculation
				self._print_stalta()

			elif n == 0:
				printM('Starting Alert trigger with sta=%ss, lta=%ss, and threshold=%s on channel=%s'
					   % (self.sta, self.lta, self.thresh, self.cha), self.sender)
				printM('Earthquake trigger warmup time of %s seconds...'
					   % (self.lta), self.sender)
			elif n == wait_pkts:
				printM('Earthquake trigger up and running normally.',
					   self.sender)
			else:
				pass

			n += 1
			sys.stdout.flush()


1			import sys, os
2			from datetime import datetime, timedelta
3			import rsudp.raspberryshake as rs
4			from obspy.signal.trigger import recursive_sta_lta, trigger_onset
5			from rsudp import printM, printW, printE
6			COLOR = {}
7			from rsudp import COLOR
8			import numpy as np
9
10			# set the terminal text color to green
11			COLOR['current'] = COLOR['green']
12
13
14			class Alert(rs.ConsumerThread):
15			"""
16			A data consumer class that listens to a specific incoming data channel
17			and calculates a recursive STA/LTA (short term average over long term
18			average). If a threshold of STA/LTA ratio is exceeded, the class
19			sets the :py:data:`alarm` flag to the alarm time as a
20			:py:class:`obspy.core.utcdatetime.UTCDateTime` object.
21			The :py:class:`rsudp.p_producer.Producer` will see this flag
22			and send an :code:`ALARM` message to the queues with the time set here.
23			Likewise, when the :py:data:`alarm_reset` flag is set with a
24			:py:class:`obspy.core.utcdatetime.UTCDateTime`,
25			the Producer will send a :code:`RESET` message to the queues.
26
27			:param float sta: short term average (STA) duration in seconds.
28			:param float lta: long term average (LTA) duration in seconds.
29			:param float thresh: threshold for STA/LTA trigger.
30			:type bp: :py:class:`bool` or :py:class:`list`
31			:param bp: bandpass filter parameters. if set, should be in the format ``[highpass, lowpass]``
32			:param bool debug: whether or not to display max STA/LTA calculation live to the console.
33			:param str cha: listening channel (defaults to [S,E]HZ)
34			:param queue.Queue q: queue of data and messages sent by :class:`rsudp.c_consumer.Consumer`
35
36			"""
37
38			def _set_filt(self, bp):
39			'''
40			This function sets the filter parameters (if specified).
41			Set to a boolean if not filtering, or ``[highpass, lowpass]``
42			if filtering.
43
44			:param bp: bandpass filter parameters. if set, should be in the format ``[highpass, lowpass]``
45			:type bp: :py:class:`bool` or :py:class:`list`
46			'''
47			if bp:
48			self.freqmin = bp[0]
49			self.freqmax = bp[1]
50			self.freq = 0
51			if (bp[0] <= 0) and (bp[1] >= (self.sps/2)):
52			self.filt = False
53			elif (bp[0] > 0) and (bp[1] >= (self.sps/2)):
54			self.filt = 'highpass'
55			self.freq = bp[0]
56			desc = 'low corner %s' % (bp[0])
57			elif (bp[0] <= 0) and (bp[1] <= (self.sps/2)):
58			self.filt = 'lowpass'
59			self.freq = bp[1]
60			else:
61			self.filt = 'bandpass'
62			else:
63			self.filt = False
64
65			if self.filt == 'bandpass':
66			printM('Alert stream will be %s filtered from %s to %s Hz'
67			% (self.filt, self.freqmin, self.freqmax), self.sender)
68			elif self.filt in ('lowpass', 'highpass'):
69			modifier = 'below' if self.filt in 'lowpass' else 'above'
70			printM('Alert stream will be %s filtered %s %s Hz'
71			% (self.filt, modifier, self.freq), self.sender)
72
73
74			def _set_deconv(self, deconv):
75			'''
76			This function sets the deconvolution units. Allowed values are as follows:
77
78			.. \|ms2\| replace:: m/s\ :sup:`2`\
79
80			- ``'VEL'`` - velocity (m/s)
81			- ``'ACC'`` - acceleration (\|ms2\|)
82			- ``'GRAV'`` - fraction of acceleration due to gravity (g, or 9.81 \|ms2\|)
83			- ``'DISP'`` - displacement (m)
84			- ``'CHAN'`` - channel-specific unit calculation, i.e. ``'VEL'`` for geophone channels and ``'ACC'`` for accelerometer channels
85
86			:param str deconv: ``'VEL'``, ``'ACC'``, ``'GRAV'``, ``'DISP'``, or ``'CHAN'``
87			'''
88			deconv = deconv.upper() if deconv else False
89			self.deconv = self.deconv if (deconv in rs.UNITS) else False
90			if self.deconv and rs.inv:
91			self.units = '%s (%s)' % (rs.UNITS[0], rs.UNITS[1]) if (self.deconv in rs.UNITS) else self.units
92			printM('Signal deconvolution set to %s' % (self.deconv), self.sender)
93			else:
94			self.units = rs.UNITS['CHAN'][1]
95			self.deconv = False
96			printM('Alert stream units are %s' % (self.units.strip(' ').lower()), self.sender)
97
98
99			def _find_chn(self):
100			'''
101			Finds channel match in list of channels.
102			'''
103			for chn in rs.chns:
104			if self.cha in chn:
105			self.cha = chn
106
107
108			def _set_channel(self, cha):
109			'''
110			This function sets the channel to listen to. Allowed values are as follows:
111
112			- "SHZ"``, ``"EHZ"``, ``"EHN"`` or ``"EHE"`` - velocity channels
113			- ``"ENZ"``, ``"ENN"``, ``"ENE"`` - acceleration channels
114			- ``"HDF"`` - pressure transducer channel
115			- ``"all"`` - resolves to either ``"EHZ"`` or ``"SHZ"`` if available
116
117			:param cha: the channel to listen to
118			:type cha: str
119			'''
120			cha = self.default_ch if (cha == 'all') else cha
121			self.cha = cha if isinstance(cha, str) else cha[0]
122
123			if self.cha in str(rs.chns):
124			self._find_chn()
125			else:
126			printE('Could not find channel %s in list of channels! Please correct and restart.' % self.cha, self.sender)
127			sys.exit(2)
128
129
130			def __init__(self, sta=5, lta=30, thresh=1.6, reset=1.55, bp=False,
131			debug=True, cha='HZ', q=False, sound=False, deconv=False,
132			args, *kwargs):
133			"""
134			Initializing the alert thread with parameters to set up the recursive
135			STA-LTA trigger, filtering, and the channel used for listening.
136			"""
137			super().__init__()
138			self.sender = 'Alert'
139			self.alive = True
140
141			self.queue = q
142
143			self.default_ch = 'HZ'
144			self.sta = sta
145			self.lta = lta
146			self.thresh = thresh
147			self.reset = reset
148			self.debug = debug
149			self.args = args
150			self.kwargs = kwargs
151			self.raw = rs.Stream()
152			self.stream = rs.Stream()
153
154			self._set_channel(cha)
155
156			self.sps = rs.sps
157			self.inv = rs.inv
158			self.stalta = np.ndarray(1)
159			self.maxstalta = 0
160			self.units = 'counts'
161
162			self._set_deconv(deconv)
163
164			self.exceed = False
165			self.sound = sound
166
167			self._set_filt(bp)
168
169
170			def _getq(self):
171			'''
172			Reads data from the queue and updates the stream.
173
174			:rtype: bool
175			:return: Returns ``True`` if stream is updated, otherwise ``False``.
176			'''
177			d = self.queue.get(True, timeout=None)
178			self.queue.task_done()
179			if self.cha in str(d):
180			self.raw = rs.update_stream(stream=self.raw, d=d, fill_value='latest')
181			return True
182			elif 'TERM' in str(d):
183			self.alive = False
184			printM('Exiting.', self.sender)
185			sys.exit()
186			else:
187			return False
188
189
190			def _deconvolve(self):
191			'''
192			Deconvolves the stream associated with this class.
193			'''
194			if self.deconv:
195			rs.deconvolve(self)
196
197
198			def _subloop(self):
199			'''
200			Gets the queue and figures out whether or not the specified channel is in the packet.
201			'''
202			while True:
203			if self.queue.qsize() > 0:
204			self._getq() # get recent packets
205			else:
206			if self._getq(): # is this the specified channel? if so break
207			break
208
209
210			def _filter(self):
211			'''
212			Filters the stream associated with this class.
213			'''
214			if self.filt:
215			if self.filt in 'bandpass':
216			self.stalta = recursive_sta_lta(
217			self.stream[0].copy().filter(type=self.filt,
218			freqmin=self.freqmin, freqmax=self.freqmax),
219			int(self.sta * self.sps), int(self.lta * self.sps))
220			else:
221			self.stalta = recursive_sta_lta(
222			self.stream[0].copy().filter(type=self.filt,
223			freq=self.freq),
224			int(self.sta * self.sps), int(self.lta * self.sps))
225			else:
226			self.stalta = recursive_sta_lta(self.stream[0],
227			int(self.sta * self.sps), int(self.lta * self.sps))
228
229
230			def _is_trigger(self):
231			'''
232			Figures out it there's a trigger active.
233			'''
234			if self.stalta.max() > self.thresh:
235			if not self.exceed:
236			# raise a flag that the Producer can read and modify
237			self.alarm = rs.fsec(self.stream[0].stats.starttime + timedelta(seconds=
238			trigger_onset(self.stalta, self.thresh,
239			self.reset)[-1][0] * self.stream[0].stats.delta))
240			self.exceed = True # the state machine; this one should not be touched from the outside, otherwise bad things will happen
241			print()
242			printM('Trigger threshold of %s exceeded at %s'
243			% (self.thresh, self.alarm.strftime('%Y-%m-%d %H:%M:%S.%f')[:22]), self.sender)
244			printM('Trigger will reset when STA/LTA goes below %s...' % self.reset, sender=self.sender)
245			COLOR['current'] = COLOR['purple']
246			else:
247			pass
248
249			if self.stalta.max() > self.maxstalta:
250			self.maxstalta = self.stalta.max()
251			else:
252			if self.exceed:
253			if self.stalta[-1] < self.reset:
254			self.alarm_reset = rs.fsec(self.stream[0].stats.endtime) # lazy; effective
255			self.exceed = False
256			print()
257			printM('Max STA/LTA ratio reached in alarm state: %s' % (round(self.maxstalta, 3)),
258			self.sender)
259			printM('Earthquake trigger reset and active again at %s' % (
260			self.alarm_reset.strftime('%Y-%m-%d %H:%M:%S.%f')[:22]),
261			self.sender)
262			self.maxstalta = 0
263			COLOR['current'] = COLOR['green']
264			else:
265			pass
266
267
268			def _print_stalta(self):
269			'''
270			Print the current max STA/LTA of the stream.
271			'''
272			if self.debug:
273			msg = '\r%s [%s] Threshold: %s; Current max STA/LTA: %.4f' % (
274			(self.stream[0].stats.starttime + timedelta(seconds=
275			len(self.stream[0].data) * self.stream[0].stats.delta)).strftime('%Y-%m-%d %H:%M:%S'),
276			self.sender,
277			self.thresh,
278			round(np.max(self.stalta[-50:]), 4)
279			)
280			print(COLOR['current'] + COLOR['bold'] + msg + COLOR['white'], end='', flush=True)
281
282
283			def run(self):
284			"""
285			Reads data from the queue into a :class:`obspy.core.stream.Stream` object,
286			then runs a :func:`obspy.signal.trigger.recursive_sta_lta` function to
287			determine whether to raise an alert flag (:py:data:`rsudp.c_alert.Alert.alarm`).
288			The producer reads this flag and uses it to notify other consumers.
289			"""
290			n = 0
291
292			wait_pkts = (self.lta) / (rs.tf / 1000)
293
294			while n > 3:
295			self.getq()
296			n += 1
297
298			n = 0
299			while True:
300			self._subloop()
301
302			self.raw = rs.copy(self.raw) # necessary to avoid memory leak
303			self.stream = self.raw.copy()
304			self._deconvolve()
305
306			if n > wait_pkts:
307			# if the trigger is activated
308			obstart = self.stream[0].stats.endtime - timedelta(seconds=self.lta) # obspy time
309			self.raw = self.raw.slice(starttime=obstart) # slice the stream to the specified length (seconds variable)
310			self.stream = self.stream.slice(starttime=obstart) # slice the stream to the specified length (seconds variable)
311
312			# filter
313			self._filter()
314			# figure out if the trigger has gone off
315			self._is_trigger()
316
317			# copy the stream (necessary to avoid memory leak)
318			self.stream = rs.copy(self.stream)
319
320			# print the current STA/LTA calculation
321			self._print_stalta()
322
323			elif n == 0:
324			printM('Starting Alert trigger with sta=%ss, lta=%ss, and threshold=%s on channel=%s'
325			% (self.sta, self.lta, self.thresh, self.cha), self.sender)
326			printM('Earthquake trigger warmup time of %s seconds...'
327			% (self.lta), self.sender)
328			elif n == wait_pkts:
329			printM('Earthquake trigger up and running normally.',
330			self.sender)
331			else:
332			pass
333
334			n += 1
335			sys.stdout.flush()
336

raspishake / rsudp

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build.rsudp.c_alert.Alert._set_filt() C

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