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1 #!/usr/bin/env python
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2 # -*- coding: utf-8 -*-
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3
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4 """
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5 parse date
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6 """
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7
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8 import argparse
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9 import datetime
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10 import sys
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11 import time
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12 from .formatting import format_table
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13 from dateutil.parser import parse
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14
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15 __all__ = ['main', 'parse_date', 'epoch2local', 'epoch2utc', 'is_dst', 'timezone']
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16
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17 def is_dst(localtime=None):
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18 """returns if daylight savings time is in effect locally"""
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19 return time.localtime(localtime).tm_isdst > 0
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20
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21 def timezone(localtime=None):
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22 """returns name of local timezone"""
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23 return time.tzname[int(is_dst(localtime))]
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24
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25 def epoch2local(datestamp):
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26 """convert epoch to local time"""
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27 return datetime.datetime.fromtimestamp(float(datestamp))
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28
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29 def epoch2utc(datestamp):
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30 """convert epoch to UTC"""
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31 return datetime.datetime.utcfromtimestamp(float(datestamp))
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32
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33
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34 def parse_date(datestamp):
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35 """returns seconds since epoch from the supplied date"""
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36
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37 try:
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38 # already epoch timestamp
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39 return float(datestamp)
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40 except ValueError:
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41 pass
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42
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43 # parse the string
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44 parsed_date = parse(datestamp)
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45
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46 # convert this to seconds since epoch
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47 return time.mktime(parsed_date.timetuple())
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48
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49
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50 def main(args=sys.argv[1:]):
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51
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52 # parse command line
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53 parser = argparse.ArgumentParser(description=__doc__)
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54 parser.add_argument('date', nargs='+',
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55 help="local date to parse")
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56 options = parser.parse_args(args)
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57
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58 # parse each date
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59 epochs = [parse_date(d) for d in options.date]
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60
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61 # display results
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62 header = ['epoch', 'local', 'UTC']
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63 print (format_table([[d, '{} {}'.format(epoch2local(d), timezone(d)), epoch2utc(d)] for d in epochs],
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64 header=header, joiner='|'))
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65
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66
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67 if __name__ == '__main__':
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68 main()
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