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47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
#
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# Copyright (c) 2009, 2010 Tom Keffer <tkeffer@gmail.com>
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#
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# See the file LICENSE.txt for your full rights.
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#
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# $Revision$
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# $Author$
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# $Date$
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#
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"""Example of how to extend a generator.
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This generator offers tag 'alltime' that makes all-time statistics available,
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such as the all-time max temperature.
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To use it, in the skin's generator_list, replace weewx.filegenerator.FileGenerator
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with examples.mygenerator.MyFileGenerator.
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You can then use tags such as $alltime.outTemp.max for the all-time max temperature.
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"""
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from weewx.filegenerator import FileGenerator
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from weewx.stats import TimeSpanStats
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from weeutil.weeutil import TimeSpan
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class MyFileGenerator(FileGenerator): # 1
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def getToDateSearchList(self, currentRec, stop_ts): # 2
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# Get a TimeSpan object that represents all time up to the stop time:
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all_time = TimeSpan(self.start_ts, stop_ts) # 3
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# Get a TimeSpanStats object :
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all_stats = TimeSpanStats(all_time,
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self.statsdb,
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formatter=self.formatter,
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converter=self.converter) # 4
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# Get the superclass's search list:
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search_list = FileGenerator.getToDateSearchList(self, currentRec, stop_ts) #5
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# Now tack on my addition as a small dictionary with key 'alltime':
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search_list += [ {'alltime' : all_stats} ] # 6
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return search_list
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