Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/isodate/isoduration.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 ##############################################################################
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2 # Copyright 2009, Gerhard Weis
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3 # All rights reserved.
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4 #
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5 # Redistribution and use in source and binary forms, with or without
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6 # modification, are permitted provided that the following conditions are met:
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7 #
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8 # * Redistributions of source code must retain the above copyright notice,
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9 # this list of conditions and the following disclaimer.
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10 # * Redistributions in binary form must reproduce the above copyright notice,
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11 # this list of conditions and the following disclaimer in the documentation
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12 # and/or other materials provided with the distribution.
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13 # * Neither the name of the authors nor the names of its contributors
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14 # may be used to endorse or promote products derived from this software
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15 # without specific prior written permission.
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16 #
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17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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18 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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21 # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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22 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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23 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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24 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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25 # CONTRACT, STRICT LIABILITY, OR TORT
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26 ##############################################################################
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27 '''
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28 This module provides an ISO 8601:2004 duration parser.
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29
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30 It also provides a wrapper to strftime. This wrapper makes it easier to
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31 format timedelta or Duration instances as ISO conforming strings.
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32 '''
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33 from datetime import timedelta
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34 from decimal import Decimal
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35 import re
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36
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37 from six import string_types
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38
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39 from isodate.duration import Duration
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40 from isodate.isoerror import ISO8601Error
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41 from isodate.isodatetime import parse_datetime
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42 from isodate.isostrf import strftime, D_DEFAULT
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43
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44 ISO8601_PERIOD_REGEX = re.compile(
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45 r"^(?P<sign>[+-])?"
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46 r"P(?!\b)"
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47 r"(?P<years>[0-9]+([,.][0-9]+)?Y)?"
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48 r"(?P<months>[0-9]+([,.][0-9]+)?M)?"
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49 r"(?P<weeks>[0-9]+([,.][0-9]+)?W)?"
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50 r"(?P<days>[0-9]+([,.][0-9]+)?D)?"
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51 r"((?P<separator>T)(?P<hours>[0-9]+([,.][0-9]+)?H)?"
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52 r"(?P<minutes>[0-9]+([,.][0-9]+)?M)?"
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53 r"(?P<seconds>[0-9]+([,.][0-9]+)?S)?)?$")
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54 # regular expression to parse ISO duartion strings.
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55
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56
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57 def parse_duration(datestring):
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58 """
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59 Parses an ISO 8601 durations into datetime.timedelta or Duration objects.
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60
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61 If the ISO date string does not contain years or months, a timedelta
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62 instance is returned, else a Duration instance is returned.
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63
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64 The following duration formats are supported:
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65 -PnnW duration in weeks
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66 -PnnYnnMnnDTnnHnnMnnS complete duration specification
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67 -PYYYYMMDDThhmmss basic alternative complete date format
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68 -PYYYY-MM-DDThh:mm:ss extended alternative complete date format
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69 -PYYYYDDDThhmmss basic alternative ordinal date format
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70 -PYYYY-DDDThh:mm:ss extended alternative ordinal date format
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71
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72 The '-' is optional.
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73
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74 Limitations: ISO standard defines some restrictions about where to use
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75 fractional numbers and which component and format combinations are
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76 allowed. This parser implementation ignores all those restrictions and
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77 returns something when it is able to find all necessary components.
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78 In detail:
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79 it does not check, whether only the last component has fractions.
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80 it allows weeks specified with all other combinations
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81
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82 The alternative format does not support durations with years, months or
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83 days set to 0.
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84 """
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85 if not isinstance(datestring, string_types):
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86 raise TypeError("Expecting a string %r" % datestring)
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87 match = ISO8601_PERIOD_REGEX.match(datestring)
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88 if not match:
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89 # try alternative format:
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90 if datestring.startswith("P"):
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91 durdt = parse_datetime(datestring[1:])
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92 if durdt.year != 0 or durdt.month != 0:
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93 # create Duration
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94 ret = Duration(days=durdt.day, seconds=durdt.second,
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95 microseconds=durdt.microsecond,
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96 minutes=durdt.minute, hours=durdt.hour,
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97 months=durdt.month, years=durdt.year)
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98 else: # FIXME: currently not possible in alternative format
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99 # create timedelta
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100 ret = timedelta(days=durdt.day, seconds=durdt.second,
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101 microseconds=durdt.microsecond,
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102 minutes=durdt.minute, hours=durdt.hour)
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103 return ret
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104 raise ISO8601Error("Unable to parse duration string %r" % datestring)
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105 groups = match.groupdict()
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106 for key, val in groups.items():
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107 if key not in ('separator', 'sign'):
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108 if val is None:
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109 groups[key] = "0n"
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110 # print groups[key]
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111 if key in ('years', 'months'):
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112 groups[key] = Decimal(groups[key][:-1].replace(',', '.'))
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113 else:
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114 # these values are passed into a timedelta object,
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115 # which works with floats.
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116 groups[key] = float(groups[key][:-1].replace(',', '.'))
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117 if groups["years"] == 0 and groups["months"] == 0:
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118 ret = timedelta(days=groups["days"], hours=groups["hours"],
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119 minutes=groups["minutes"], seconds=groups["seconds"],
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120 weeks=groups["weeks"])
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121 if groups["sign"] == '-':
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122 ret = timedelta(0) - ret
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123 else:
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124 ret = Duration(years=groups["years"], months=groups["months"],
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125 days=groups["days"], hours=groups["hours"],
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126 minutes=groups["minutes"], seconds=groups["seconds"],
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127 weeks=groups["weeks"])
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128 if groups["sign"] == '-':
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129 ret = Duration(0) - ret
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130 return ret
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131
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132
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133 def duration_isoformat(tduration, format=D_DEFAULT):
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134 '''
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135 Format duration strings.
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136
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137 This method is just a wrapper around isodate.isostrf.strftime and uses
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138 P%P (D_DEFAULT) as default format.
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139 '''
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140 # TODO: implement better decision for negative Durations.
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141 # should be done in Duration class in consistent way with timedelta.
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142 if (((isinstance(tduration, Duration) and
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143 (tduration.years < 0 or tduration.months < 0 or
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144 tduration.tdelta < timedelta(0))) or
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145 (isinstance(tduration, timedelta) and
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146 (tduration < timedelta(0))))):
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147 ret = '-'
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148 else:
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149 ret = ''
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150 ret += strftime(tduration, format)
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151 return ret