root / env / lib / python2.7 / site-packages / django / utils / dateformat.py @ 1a305335
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1 | 1a305335 | officers | """
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2 | PHP date() style date formatting
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3 | See http://www.php.net/date for format strings
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4 |
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5 | Usage:
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6 | >>> import datetime
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7 | >>> d = datetime.datetime.now()
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8 | >>> df = DateFormat(d)
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9 | >>> print df.format('jS F Y H:i')
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10 | 7th October 2003 11:39
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11 | >>>
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12 | """
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13 | |||
14 | import re |
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15 | import time |
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16 | import calendar |
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17 | import datetime |
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18 | |||
19 | from django.utils.dates import MONTHS, MONTHS_3, MONTHS_ALT, MONTHS_AP, WEEKDAYS, WEEKDAYS_ABBR |
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20 | from django.utils.tzinfo import LocalTimezone |
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21 | from django.utils.translation import ugettext as _ |
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22 | from django.utils.encoding import force_unicode |
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23 | from django.utils.timezone import is_aware, is_naive |
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24 | |||
25 | re_formatchars = re.compile(r'(?<!\\)([aAbBcdDeEfFgGhHiIjlLmMnNoOPrsStTUuwWyYzZ])')
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26 | re_escaped = re.compile(r'\\(.)')
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27 | |||
28 | class Formatter(object): |
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29 | def format(self, formatstr): |
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30 | pieces = [] |
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31 | for i, piece in enumerate(re_formatchars.split(force_unicode(formatstr))): |
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32 | if i % 2: |
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33 | pieces.append(force_unicode(getattr(self, piece)())) |
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34 | elif piece:
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35 | pieces.append(re_escaped.sub(r'\1', piece))
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36 | return u''.join(pieces) |
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37 | |||
38 | class TimeFormat(Formatter): |
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39 | def __init__(self, t): |
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40 | self.data = t
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41 | |||
42 | def a(self): |
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43 | "'a.m.' or 'p.m.'"
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44 | if self.data.hour > 11: |
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45 | return _('p.m.') |
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46 | return _('a.m.') |
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47 | |||
48 | def A(self): |
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49 | "'AM' or 'PM'"
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50 | if self.data.hour > 11: |
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51 | return _('PM') |
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52 | return _('AM') |
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53 | |||
54 | def B(self): |
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55 | "Swatch Internet time"
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56 | raise NotImplementedError |
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57 | |||
58 | def f(self): |
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59 | """
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60 | Time, in 12-hour hours and minutes, with minutes left off if they're
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61 | zero.
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62 | Examples: '1', '1:30', '2:05', '2'
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63 | Proprietary extension.
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64 | """
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65 | if self.data.minute == 0: |
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66 | return self.g() |
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67 | return u'%s:%s' % (self.g(), self.i()) |
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68 | |||
69 | def g(self): |
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70 | "Hour, 12-hour format without leading zeros; i.e. '1' to '12'"
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71 | if self.data.hour == 0: |
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72 | return 12 |
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73 | if self.data.hour > 12: |
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74 | return self.data.hour - 12 |
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75 | return self.data.hour |
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76 | |||
77 | def G(self): |
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78 | "Hour, 24-hour format without leading zeros; i.e. '0' to '23'"
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79 | return self.data.hour |
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80 | |||
81 | def h(self): |
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82 | "Hour, 12-hour format; i.e. '01' to '12'"
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83 | return u'%02d' % self.g() |
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84 | |||
85 | def H(self): |
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86 | "Hour, 24-hour format; i.e. '00' to '23'"
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87 | return u'%02d' % self.G() |
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88 | |||
89 | def i(self): |
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90 | "Minutes; i.e. '00' to '59'"
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91 | return u'%02d' % self.data.minute |
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92 | |||
93 | def P(self): |
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94 | """
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95 | Time, in 12-hour hours, minutes and 'a.m.'/'p.m.', with minutes left off
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96 | if they're zero and the strings 'midnight' and 'noon' if appropriate.
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97 | Examples: '1 a.m.', '1:30 p.m.', 'midnight', 'noon', '12:30 p.m.'
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98 | Proprietary extension.
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99 | """
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100 | if self.data.minute == 0 and self.data.hour == 0: |
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101 | return _('midnight') |
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102 | if self.data.minute == 0 and self.data.hour == 12: |
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103 | return _('noon') |
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104 | return u'%s %s' % (self.f(), self.a()) |
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105 | |||
106 | def s(self): |
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107 | "Seconds; i.e. '00' to '59'"
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108 | return u'%02d' % self.data.second |
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109 | |||
110 | def u(self): |
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111 | "Microseconds"
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112 | return self.data.microsecond |
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113 | |||
114 | |||
115 | class DateFormat(TimeFormat): |
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116 | year_days = [None, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334] |
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117 | |||
118 | def __init__(self, dt): |
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119 | # Accepts either a datetime or date object.
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120 | self.data = dt
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121 | self.timezone = None |
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122 | if isinstance(dt, datetime.datetime): |
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123 | if is_naive(dt):
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124 | self.timezone = LocalTimezone(dt)
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125 | else:
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126 | self.timezone = dt.tzinfo
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127 | |||
128 | def b(self): |
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129 | "Month, textual, 3 letters, lowercase; e.g. 'jan'"
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130 | return MONTHS_3[self.data.month] |
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131 | |||
132 | def c(self): |
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133 | """
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134 | ISO 8601 Format
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135 | Example : '2008-01-02T10:30:00.000123'
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136 | """
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137 | return self.data.isoformat() |
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138 | |||
139 | def d(self): |
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140 | "Day of the month, 2 digits with leading zeros; i.e. '01' to '31'"
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141 | return u'%02d' % self.data.day |
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142 | |||
143 | def D(self): |
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144 | "Day of the week, textual, 3 letters; e.g. 'Fri'"
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145 | return WEEKDAYS_ABBR[self.data.weekday()] |
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146 | |||
147 | def e(self): |
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148 | "Timezone name if available"
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149 | try:
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150 | if hasattr(self.data, 'tzinfo') and self.data.tzinfo: |
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151 | # Have to use tzinfo.tzname and not datetime.tzname
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152 | # because datatime.tzname does not expect Unicode
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153 | return self.data.tzinfo.tzname(self.data) or "" |
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154 | except NotImplementedError: |
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155 | pass
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156 | return "" |
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157 | |||
158 | def E(self): |
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159 | "Alternative month names as required by some locales. Proprietary extension."
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160 | return MONTHS_ALT[self.data.month] |
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161 | |||
162 | def F(self): |
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163 | "Month, textual, long; e.g. 'January'"
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164 | return MONTHS[self.data.month] |
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165 | |||
166 | def I(self): |
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167 | "'1' if Daylight Savings Time, '0' otherwise."
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168 | if self.timezone and self.timezone.dst(self.data): |
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169 | return u'1' |
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170 | else:
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171 | return u'0' |
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172 | |||
173 | def j(self): |
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174 | "Day of the month without leading zeros; i.e. '1' to '31'"
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175 | return self.data.day |
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176 | |||
177 | def l(self): |
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178 | "Day of the week, textual, long; e.g. 'Friday'"
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179 | return WEEKDAYS[self.data.weekday()] |
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180 | |||
181 | def L(self): |
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182 | "Boolean for whether it is a leap year; i.e. True or False"
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183 | return calendar.isleap(self.data.year) |
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184 | |||
185 | def m(self): |
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186 | "Month; i.e. '01' to '12'"
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187 | return u'%02d' % self.data.month |
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188 | |||
189 | def M(self): |
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190 | "Month, textual, 3 letters; e.g. 'Jan'"
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191 | return MONTHS_3[self.data.month].title() |
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192 | |||
193 | def n(self): |
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194 | "Month without leading zeros; i.e. '1' to '12'"
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195 | return self.data.month |
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196 | |||
197 | def N(self): |
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198 | "Month abbreviation in Associated Press style. Proprietary extension."
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199 | return MONTHS_AP[self.data.month] |
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200 | |||
201 | def o(self): |
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202 | "ISO 8601 year number matching the ISO week number (W)"
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203 | return self.data.isocalendar()[0] |
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204 | |||
205 | def O(self): |
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206 | "Difference to Greenwich time in hours; e.g. '+0200', '-0430'"
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207 | seconds = self.Z()
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208 | sign = '-' if seconds < 0 else '+' |
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209 | seconds = abs(seconds)
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210 | return u"%s%02d%02d" % (sign, seconds // 3600, (seconds // 60) % 60) |
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211 | |||
212 | def r(self): |
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213 | "RFC 2822 formatted date; e.g. 'Thu, 21 Dec 2000 16:01:07 +0200'"
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214 | return self.format('D, j M Y H:i:s O') |
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215 | |||
216 | def S(self): |
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217 | "English ordinal suffix for the day of the month, 2 characters; i.e. 'st', 'nd', 'rd' or 'th'"
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218 | if self.data.day in (11, 12, 13): # Special case |
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219 | return u'th' |
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220 | last = self.data.day % 10 |
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221 | if last == 1: |
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222 | return u'st' |
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223 | if last == 2: |
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224 | return u'nd' |
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225 | if last == 3: |
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226 | return u'rd' |
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227 | return u'th' |
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228 | |||
229 | def t(self): |
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230 | "Number of days in the given month; i.e. '28' to '31'"
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231 | return u'%02d' % calendar.monthrange(self.data.year, self.data.month)[1] |
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232 | |||
233 | def T(self): |
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234 | "Time zone of this machine; e.g. 'EST' or 'MDT'"
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235 | name = self.timezone and self.timezone.tzname(self.data) or None |
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236 | if name is None: |
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237 | name = self.format('O') |
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238 | return unicode(name) |
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239 | |||
240 | def U(self): |
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241 | "Seconds since the Unix epoch (January 1 1970 00:00:00 GMT)"
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242 | if isinstance(self.data, datetime.datetime) and is_aware(self.data): |
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243 | return int(calendar.timegm(self.data.utctimetuple())) |
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244 | else:
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245 | return int(time.mktime(self.data.timetuple())) |
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246 | |||
247 | def w(self): |
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248 | "Day of the week, numeric, i.e. '0' (Sunday) to '6' (Saturday)"
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249 | return (self.data.weekday() + 1) % 7 |
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250 | |||
251 | def W(self): |
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252 | "ISO-8601 week number of year, weeks starting on Monday"
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253 | # Algorithm from http://www.personal.ecu.edu/mccartyr/ISOwdALG.txt
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254 | week_number = None
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255 | jan1_weekday = self.data.replace(month=1, day=1).weekday() + 1 |
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256 | weekday = self.data.weekday() + 1 |
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257 | day_of_year = self.z()
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258 | if day_of_year <= (8 - jan1_weekday) and jan1_weekday > 4: |
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259 | if jan1_weekday == 5 or (jan1_weekday == 6 and calendar.isleap(self.data.year-1)): |
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260 | week_number = 53
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261 | else:
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262 | week_number = 52
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263 | else:
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264 | if calendar.isleap(self.data.year): |
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265 | i = 366
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266 | else:
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267 | i = 365
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268 | if (i - day_of_year) < (4 - weekday): |
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269 | week_number = 1
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270 | else:
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271 | j = day_of_year + (7 - weekday) + (jan1_weekday - 1) |
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272 | week_number = j // 7
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273 | if jan1_weekday > 4: |
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274 | week_number -= 1
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275 | return week_number
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276 | |||
277 | def y(self): |
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278 | "Year, 2 digits; e.g. '99'"
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279 | return unicode(self.data.year)[2:] |
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280 | |||
281 | def Y(self): |
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282 | "Year, 4 digits; e.g. '1999'"
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283 | return self.data.year |
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284 | |||
285 | def z(self): |
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286 | "Day of the year; i.e. '0' to '365'"
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287 | doy = self.year_days[self.data.month] + self.data.day |
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288 | if self.L() and self.data.month > 2: |
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289 | doy += 1
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290 | return doy
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291 | |||
292 | def Z(self): |
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293 | """
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294 | Time zone offset in seconds (i.e. '-43200' to '43200'). The offset for
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295 | timezones west of UTC is always negative, and for those east of UTC is
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296 | always positive.
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297 | """
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298 | if not self.timezone: |
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299 | return 0 |
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300 | offset = self.timezone.utcoffset(self.data) |
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301 | # `offset` is a datetime.timedelta. For negative values (to the west of
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302 | # UTC) only days can be negative (days=-1) and seconds are always
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303 | # positive. e.g. UTC-1 -> timedelta(days=-1, seconds=82800, microseconds=0)
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304 | # Positive offsets have days=0
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305 | return offset.days * 86400 + offset.seconds |
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306 | |||
307 | def format(value, format_string): |
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308 | "Convenience function"
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309 | df = DateFormat(value) |
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310 | return df.format(format_string)
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311 | |||
312 | def time_format(value, format_string): |
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313 | "Convenience function"
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314 | tf = TimeFormat(value) |
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315 | return tf.format(format_string) |