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""" |
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Test routines for wpylib.datetime module (and related submodules). |
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""" |
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from time import localtime, gmtime, strftime |
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from wpylib.datetime0_idt import idatetime |
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from wpylib.datetime import utime_to_iso |
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def test_idt_01(): |
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"""[20141016] |
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Basic idatetime tests. |
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""" |
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iidt = 20141201083724315 |
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idt = idatetime(iidt) |
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print "integer value = %+18d" % idt.idt |
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print "iso8601 format = %s" % idt.str_iso8601() |
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def test_u2i_01(): |
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"""[20141016] |
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Testing utime_to_iso subroutine. |
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Output: |
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unix time = 1413475094.058478 |
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time interpretation (local) = Thu Oct 16 11:58:14 EDT 2014 |
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utime_to_iso output (local) = 2014-10-16 11:58:14 -04:00 |
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utime_to_iso output (local/iso8601) = 2014-10-16T11:58:14.058478116-04:00 |
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time interpretation (utc) = Thu Oct 16 15:58:14 EST 2014 |
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utime_to_iso output (utc) = 2014-10-16 15:58:14 +00:00 |
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utime_to_iso output (utc/iso8601) = 2014-10-16T15:58:14.058478116Z |
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utime_to_iso output (utc/idtstamp) = 2014-10-16T15:58:14.058 |
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""" |
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unix_time = 1413475094.058478 |
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str_time = utime_to_iso(unix_time, local=True) |
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str_gmtime = utime_to_iso(unix_time, local=False) |
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print "unix time = ", "%.16g" % unix_time |
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print "time interpretation (local) = ", strftime("%a %b %e %H:%M:%S %Z %Y", localtime(unix_time)) |
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print "utime_to_iso output (local) = ", str_time |
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print "utime_to_iso output (local/iso8601) = ", utime_to_iso(unix_time, local=True, fmt='iso8601') |
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print "time interpretation (utc) = ", strftime("%a %b %e %H:%M:%S %Z %Y", gmtime(unix_time)) |
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print "utime_to_iso output (utc) = ", str_gmtime |
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print "utime_to_iso output (utc/iso8601) = ", utime_to_iso(unix_time, local=False, fmt='iso8601') |
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print "utime_to_iso output (utc/idtstamp) = ", utime_to_iso(unix_time, local=False, fmt='idtstamp') |
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# |
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# wpylib.datetime0_idt |
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# Created: 20141015 |
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# Wirawan Purwanto |
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# |
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# Simple date/time stamp using 64-bit integer. |
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# This module is an internal module; the exported name will |
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# be put in wpylib.datetime module. |
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# |
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""" |
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wplib.datetime0_idt module |
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Simple date/time stamp using 64-bit integer. |
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The primary motivation of creating this class is to store date/time |
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information in the most compact way, while keeping the ease of |
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human readability. |
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The internal format is very simple: |
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YYYYMMDDhhmmssfff |
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where: |
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- YYYY = year (0 < YYYY <= 9999) |
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- MM = month (1 <= MM <= 12) |
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- DD = day |
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- hh = hour (0 <= hh < 24) |
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- mm = minutes |
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- ss = seconds |
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- fff = milliseconds |
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The time is always expressed in terms of UTC to eliminate ambiguity of |
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time zone, daylight savings time, etc. |
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CAVEAT: The resolution of the time is only on the order of millisecond. |
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This is a 17-decimal-digit integer, which fits in a 64-bit range (9.22e+18). |
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""" |
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from wpylib.params import struct |
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class idatetime(object): |
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"""Simple 8-byte integer representation of a date/time stamp. |
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""" |
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def __init__(self, idt=None): |
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if idt != None: |
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self.idt = idt |
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def validate(self): |
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raise NotImplementedError |
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def split_values(self): |
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"""Splits the compact datetime into components. |
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Warning: the values are NOT validated. |
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""" |
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idt = self.idt |
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s = str(idt) |
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R = struct() |
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#R.YYYY, R.MM, R.DD, R.hh, R.mm, R.ss, R.fff # names are too cryptic |
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# Use same member names as in datetime (in sofar it is possible): |
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R.year, R.month, R.day, R.hour, R.minute, R.second, R.millisecond = map(int, [ |
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s[:-13], # year |
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s[-13:-11], # month |
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s[-11:-9], # day |
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s[-9:-7], # hour |
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s[-7:-5], # min |
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s[-5:-3], # sec |
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s[-3:] # millisec |
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]) |
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R.microsecond = R.millisecond * 1000 |
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return R |
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def to_datetime(self): |
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"""Converts the object value to standard python datetime object. |
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""" |
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from datetime import datetime |
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R = self.split_values() |
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dt = datetime(R.year, R.month, R.day, R.hour, R.minute, R.second, R.microsecond) |
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''' |
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idt = self.idt |
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s = str(idt) |
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YYYY, MM, DD, hh, mm, ss, ms = map(int, [ |
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s[:-13], # year |
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s[-13:-11], # month |
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s[-11:-9], # day |
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s[-9:-7], # hour |
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s[-7:-5], # min |
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s[-5:-3], # sec |
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s[-3:] # millisec |
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]) |
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dt = datetime(YYYY, MM, DD, hh, mm, ss, fff*1000) |
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''' |
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return dt |
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def str_iso8601(self): |
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"""Outputs the object according to ISO-8601 combined date/time format. |
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No time zone is shown.""" |
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R = self.split_values() |
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fmt = "%(year)04d-%(month)02d-%(day)02dT%(hour)02d:%(minute)02d:%(second)02d.%(millisecond)03d" |
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return fmt % R |
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