root / snf-common / synnefo / lib / utils.py @ 5f6ad491
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1 | c4e55622 | Christos Stavrakakis | # Copyright 2012 GRNET S.A. All rights reserved.
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2 | c4e55622 | Christos Stavrakakis | #
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3 | c4e55622 | Christos Stavrakakis | # Redistribution and use in source and binary forms, with or
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4 | c4e55622 | Christos Stavrakakis | # without modification, are permitted provided that the following
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5 | c4e55622 | Christos Stavrakakis | # conditions are met:
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6 | c4e55622 | Christos Stavrakakis | #
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7 | c4e55622 | Christos Stavrakakis | # 1. Redistributions of source code must retain the above
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8 | c4e55622 | Christos Stavrakakis | # copyright notice, this list of conditions and the following
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9 | c4e55622 | Christos Stavrakakis | # disclaimer.
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10 | c4e55622 | Christos Stavrakakis | #
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11 | c4e55622 | Christos Stavrakakis | # 2. Redistributions in binary form must reproduce the above
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12 | c4e55622 | Christos Stavrakakis | # copyright notice, this list of conditions and the following
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13 | c4e55622 | Christos Stavrakakis | # disclaimer in the documentation and/or other materials
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14 | c4e55622 | Christos Stavrakakis | # provided with the distribution.
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15 | c4e55622 | Christos Stavrakakis | #
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16 | c4e55622 | Christos Stavrakakis | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | c4e55622 | Christos Stavrakakis | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | c4e55622 | Christos Stavrakakis | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | c4e55622 | Christos Stavrakakis | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | c4e55622 | Christos Stavrakakis | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | c4e55622 | Christos Stavrakakis | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | c4e55622 | Christos Stavrakakis | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | c4e55622 | Christos Stavrakakis | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | c4e55622 | Christos Stavrakakis | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | c4e55622 | Christos Stavrakakis | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | c4e55622 | Christos Stavrakakis | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | c4e55622 | Christos Stavrakakis | # POSSIBILITY OF SUCH DAMAGE.
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28 | c4e55622 | Christos Stavrakakis | #
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29 | c4e55622 | Christos Stavrakakis | # The views and conclusions contained in the software and
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30 | c4e55622 | Christos Stavrakakis | # documentation are those of the authors and should not be
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31 | c4e55622 | Christos Stavrakakis | # interpreted as representing official policies, either expressed
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32 | c4e55622 | Christos Stavrakakis | # or implied, of GRNET S.A.
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33 | c4e55622 | Christos Stavrakakis | |
34 | c4e55622 | Christos Stavrakakis | import datetime |
35 | c4e55622 | Christos Stavrakakis | |
36 | c4e55622 | Christos Stavrakakis | def split_time(value): |
37 | c4e55622 | Christos Stavrakakis | """Splits time as floating point number into a tuple.
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38 | c4e55622 | Christos Stavrakakis |
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39 | c4e55622 | Christos Stavrakakis | @param value: Time in seconds
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40 | c4e55622 | Christos Stavrakakis | @type value: int or float
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41 | c4e55622 | Christos Stavrakakis | @return: Tuple containing (seconds, microseconds)
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42 | c4e55622 | Christos Stavrakakis |
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43 | c4e55622 | Christos Stavrakakis | """
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44 | c4e55622 | Christos Stavrakakis | (seconds, microseconds) = divmod(int(value * 1000000), 1000000) |
45 | c4e55622 | Christos Stavrakakis | |
46 | c4e55622 | Christos Stavrakakis | assert 0 <= seconds, \ |
47 | c4e55622 | Christos Stavrakakis | "Seconds must be larger than or equal to 0, but are %s" % seconds
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48 | c4e55622 | Christos Stavrakakis | assert 0 <= microseconds <= 999999, \ |
49 | c4e55622 | Christos Stavrakakis | "Microseconds must be 0-999999, but are %s" % microseconds
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50 | c4e55622 | Christos Stavrakakis | |
51 | c4e55622 | Christos Stavrakakis | return (int(seconds), int(microseconds)) |
52 | c4e55622 | Christos Stavrakakis | |
53 | c4e55622 | Christos Stavrakakis | |
54 | c4e55622 | Christos Stavrakakis | def merge_time(timetuple): |
55 | c4e55622 | Christos Stavrakakis | """Merges a tuple into a datetime object
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56 | c4e55622 | Christos Stavrakakis |
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57 | c4e55622 | Christos Stavrakakis | @param timetuple: Time as tuple, (seconds, microseconds)
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58 | c4e55622 | Christos Stavrakakis | @type timetuple: tuple
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59 | c4e55622 | Christos Stavrakakis | @return: Time as a datetime object
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60 | c4e55622 | Christos Stavrakakis |
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61 | c4e55622 | Christos Stavrakakis | """
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62 | c4e55622 | Christos Stavrakakis | (seconds, microseconds) = timetuple |
63 | c4e55622 | Christos Stavrakakis | |
64 | c4e55622 | Christos Stavrakakis | assert 0 <= seconds, \ |
65 | c4e55622 | Christos Stavrakakis | "Seconds must be larger than or equal to 0, but are %s" % seconds
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66 | c4e55622 | Christos Stavrakakis | assert 0 <= microseconds <= 999999, \ |
67 | c4e55622 | Christos Stavrakakis | "Microseconds must be 0-999999, but are %s" % microseconds
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68 | c4e55622 | Christos Stavrakakis | |
69 | c4e55622 | Christos Stavrakakis | t1 = float(seconds) + (float(microseconds) * 0.000001) |
70 | c4e55622 | Christos Stavrakakis | return datetime.datetime.fromtimestamp(t1) |