Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 1 | """Strptime-related classes and functions. |
| 2 | |
| 3 | CLASSES: |
| 4 | LocaleTime -- Discovers and/or stores locale-specific time information |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 5 | TimeRE -- Creates regexes for pattern matching a string of text containing |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 6 | time information as is returned by time.strftime() |
| 7 | |
| 8 | FUNCTIONS: |
| 9 | firstjulian -- Calculates the Julian date up to the first of the specified |
| 10 | year |
| 11 | gregorian -- Calculates the Gregorian date based on the Julian day and |
| 12 | year |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 13 | julianday -- Calculates the Julian day since the first of the year based |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 14 | on the Gregorian date |
| 15 | dayofweek -- Calculates the day of the week from the Gregorian date. |
| 16 | strptime -- Calculates the time struct represented by the passed-in string |
| 17 | |
| 18 | Requires Python 2.2.1 or higher. |
| 19 | Can be used in Python 2.2 if the following line is added: |
| 20 | >>> True = 1; False = 0 |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 21 | """ |
| 22 | import time |
| 23 | import locale |
| 24 | import calendar |
| 25 | from re import compile as re_compile |
| 26 | from re import IGNORECASE |
| 27 | from string import whitespace as whitespace_string |
| 28 | |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 29 | __version__ = (2,1,6) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 30 | __author__ = "Brett Cannon" |
| 31 | __email__ = "drifty@bigfoot.com" |
| 32 | |
| 33 | __all__ = ['strptime'] |
| 34 | |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 35 | RegexpType = type(re_compile('')) |
| 36 | |
| 37 | |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 38 | class LocaleTime(object): |
| 39 | """Stores and handles locale-specific information related to time. |
| 40 | |
| 41 | ATTRIBUTES (all read-only after instance creation! Instance variables that |
| 42 | store the values have mangled names): |
| 43 | f_weekday -- full weekday names (7-item list) |
| 44 | a_weekday -- abbreviated weekday names (7-item list) |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 45 | f_month -- full weekday names (14-item list; dummy value in [0], which |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 46 | is added by code) |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 47 | a_month -- abbreviated weekday names (13-item list, dummy value in |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 48 | [0], which is added by code) |
| 49 | am_pm -- AM/PM representation (2-item list) |
| 50 | LC_date_time -- format string for date/time representation (string) |
| 51 | LC_date -- format string for date representation (string) |
| 52 | LC_time -- format string for time representation (string) |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 53 | timezone -- daylight- and non-daylight-savings timezone representation |
| 54 | (3-item list; code tacks on blank item at end for |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 55 | possible lack of timezone such as UTC) |
| 56 | lang -- Language used by instance (string) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 57 | """ |
| 58 | |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 59 | def __init__(self, f_weekday=None, a_weekday=None, f_month=None, |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 60 | a_month=None, am_pm=None, LC_date_time=None, LC_time=None, |
| 61 | LC_date=None, timezone=None, lang=None): |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 62 | """Optionally set attributes with passed-in values.""" |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 63 | if f_weekday is None: |
| 64 | self.__f_weekday = None |
| 65 | elif len(f_weekday) == 7: |
| 66 | self.__f_weekday = list(f_weekday) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 67 | else: |
| 68 | raise TypeError("full weekday names must be a 7-item sequence") |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 69 | if a_weekday is None: |
| 70 | self.__a_weekday = None |
| 71 | elif len(a_weekday) == 7: |
| 72 | self.__a_weekday = list(a_weekday) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 73 | else: |
| 74 | raise TypeError( |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 75 | "abbreviated weekday names must be a 7-item sequence") |
| 76 | if f_month is None: |
| 77 | self.__f_month = None |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 78 | elif len(f_month) == 12: |
| 79 | self.__f_month = self.__pad(f_month, True) |
| 80 | else: |
| 81 | raise TypeError("full month names must be a 12-item sequence") |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 82 | if a_month is None: |
| 83 | self.__a_month = None |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 84 | elif len(a_month) == 12: |
| 85 | self.__a_month = self.__pad(a_month, True) |
| 86 | else: |
| 87 | raise TypeError( |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 88 | "abbreviated month names must be a 12-item sequence") |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 89 | if am_pm is None: |
| 90 | self.__am_pm = None |
| 91 | elif len(am_pm) == 2: |
| 92 | self.__am_pm = am_pm |
| 93 | else: |
| 94 | raise TypeError("AM/PM representation must be a 2-item sequence") |
| 95 | self.__LC_date_time = LC_date_time |
| 96 | self.__LC_time = LC_time |
| 97 | self.__LC_date = LC_date |
| 98 | self.__timezone = timezone |
| 99 | if timezone: |
| 100 | if len(timezone) != 2: |
| 101 | raise TypeError("timezone names must contain 2 items") |
| 102 | else: |
| 103 | self.__timezone = self.__pad(timezone, False) |
| 104 | self.__lang = lang |
| 105 | |
| 106 | def __pad(self, seq, front): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 107 | # Add '' to seq to either front (is True), else the back. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 108 | seq = list(seq) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 109 | if front: |
| 110 | seq.insert(0, '') |
| 111 | else: |
| 112 | seq.append('') |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 113 | return seq |
| 114 | |
| 115 | def __set_nothing(self, stuff): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 116 | # Raise TypeError when trying to set an attribute. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 117 | raise TypeError("attribute does not support assignment") |
| 118 | |
| 119 | def __get_f_weekday(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 120 | # Fetch self.f_weekday. |
| 121 | if not self.__f_weekday: |
| 122 | self.__calc_weekday() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 123 | return self.__f_weekday |
| 124 | |
| 125 | def __get_a_weekday(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 126 | # Fetch self.a_weekday. |
| 127 | if not self.__a_weekday: |
| 128 | self.__calc_weekday() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 129 | return self.__a_weekday |
| 130 | |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 131 | f_weekday = property(__get_f_weekday, __set_nothing, |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 132 | doc="Full weekday names") |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 133 | a_weekday = property(__get_a_weekday, __set_nothing, |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 134 | doc="Abbreviated weekday names") |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 135 | |
| 136 | def __get_f_month(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 137 | # Fetch self.f_month. |
| 138 | if not self.__f_month: |
| 139 | self.__calc_month() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 140 | return self.__f_month |
| 141 | |
| 142 | def __get_a_month(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 143 | # Fetch self.a_month. |
| 144 | if not self.__a_month: |
| 145 | self.__calc_month() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 146 | return self.__a_month |
| 147 | |
| 148 | f_month = property(__get_f_month, __set_nothing, |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 149 | doc="Full month names (dummy value at index 0)") |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 150 | a_month = property(__get_a_month, __set_nothing, |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 151 | doc="Abbreviated month names (dummy value at index 0)") |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 152 | |
| 153 | def __get_am_pm(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 154 | # Fetch self.am_pm. |
| 155 | if not self.__am_pm: |
| 156 | self.__calc_am_pm() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 157 | return self.__am_pm |
| 158 | |
| 159 | am_pm = property(__get_am_pm, __set_nothing, doc="AM/PM representation") |
| 160 | |
| 161 | def __get_timezone(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 162 | # Fetch self.timezone. |
| 163 | if not self.__timezone: |
| 164 | self.__calc_timezone() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 165 | return self.__timezone |
| 166 | |
| 167 | timezone = property(__get_timezone, __set_nothing, |
| 168 | doc="Timezone representation (dummy value at index 2)") |
| 169 | |
| 170 | def __get_LC_date_time(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 171 | # Fetch self.LC_date_time. |
| 172 | if not self.__LC_date_time: |
| 173 | self.__calc_date_time() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 174 | return self.__LC_date_time |
| 175 | |
| 176 | def __get_LC_date(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 177 | # Fetch self.LC_date. |
| 178 | if not self.__LC_date: |
| 179 | self.__calc_date_time() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 180 | return self.__LC_date |
| 181 | |
| 182 | def __get_LC_time(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 183 | # Fetch self.LC_time. |
| 184 | if not self.__LC_time: |
| 185 | self.__calc_date_time() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 186 | return self.__LC_time |
| 187 | |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 188 | LC_date_time = property( |
| 189 | __get_LC_date_time, __set_nothing, |
| 190 | doc= |
| 191 | "Format string for locale's date/time representation ('%c' format)") |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 192 | LC_date = property(__get_LC_date, __set_nothing, |
| 193 | doc="Format string for locale's date representation ('%x' format)") |
| 194 | LC_time = property(__get_LC_time, __set_nothing, |
| 195 | doc="Format string for locale's time representation ('%X' format)") |
| 196 | |
| 197 | def __get_lang(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 198 | # Fetch self.lang. |
| 199 | if not self.__lang: |
| 200 | self.__calc_lang() |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 201 | return self.__lang |
| 202 | |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 203 | lang = property(__get_lang, __set_nothing, |
| 204 | doc="Language used for instance") |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 205 | |
| 206 | def __calc_weekday(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 207 | # Set self.__a_weekday and self.__f_weekday using the calendar |
| 208 | # module. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 209 | a_weekday = [calendar.day_abbr[i] for i in range(7)] |
| 210 | f_weekday = [calendar.day_name[i] for i in range(7)] |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 211 | if not self.__a_weekday: |
| 212 | self.__a_weekday = a_weekday |
| 213 | if not self.__f_weekday: |
| 214 | self.__f_weekday = f_weekday |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 215 | |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 216 | def __calc_month(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 217 | # Set self.__f_month and self.__a_month using the calendar module. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 218 | a_month = [calendar.month_abbr[i] for i in range(13)] |
| 219 | f_month = [calendar.month_name[i] for i in range(13)] |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 220 | if not self.__a_month: |
| 221 | self.__a_month = a_month |
| 222 | if not self.__f_month: |
| 223 | self.__f_month = f_month |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 224 | |
| 225 | def __calc_am_pm(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 226 | # Set self.__am_pm by using time.strftime(). |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 227 | |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 228 | # The magic date (1999,3,17,hour,44,55,2,76,0) is not really that |
| 229 | # magical; just happened to have used it everywhere else where a |
| 230 | # static date was needed. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 231 | am_pm = [] |
| 232 | for hour in (01,22): |
| 233 | time_tuple = time.struct_time((1999,3,17,hour,44,55,2,76,0)) |
| 234 | am_pm.append(time.strftime("%p", time_tuple)) |
| 235 | self.__am_pm = am_pm |
| 236 | |
| 237 | def __calc_date_time(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 238 | # Set self.__date_time, self.__date, & self.__time by using |
| 239 | # time.strftime(). |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 240 | |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 241 | # Use (1999,3,17,22,44,55,2,76,0) for magic date because the amount of |
| 242 | # overloaded numbers is minimized. The order in which searches for |
| 243 | # values within the format string is very important; it eliminates |
| 244 | # possible ambiguity for what something represents. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 245 | time_tuple = time.struct_time((1999,3,17,22,44,55,2,76,0)) |
| 246 | date_time = [None, None, None] |
| 247 | date_time[0] = time.strftime("%c", time_tuple) |
| 248 | date_time[1] = time.strftime("%x", time_tuple) |
| 249 | date_time[2] = time.strftime("%X", time_tuple) |
| 250 | for offset,directive in ((0,'%c'), (1,'%x'), (2,'%X')): |
| 251 | current_format = date_time[offset] |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 252 | for old, new in ( |
| 253 | ('%', '%%'), (self.f_weekday[2], '%A'), |
| 254 | (self.f_month[3], '%B'), (self.a_weekday[2], '%a'), |
| 255 | (self.a_month[3], '%b'), (self.am_pm[1], '%p'), |
| 256 | (self.timezone[0], '%Z'), (self.timezone[1], '%Z'), |
| 257 | ('1999', '%Y'), ('99', '%y'), ('22', '%H'), |
| 258 | ('44', '%M'), ('55', '%S'), ('76', '%j'), |
| 259 | ('17', '%d'), ('03', '%m'), ('3', '%m'), |
| 260 | # '3' needed for when no leading zero. |
| 261 | ('2', '%w'), ('10', '%I')): |
| 262 | try: |
| 263 | # Done this way to deal with possible lack of locale info |
| 264 | # manifesting itself as the empty string (i.e., Swedish's |
| 265 | # lack of AM/PM info). |
| 266 | current_format = current_format.replace(old, new) |
| 267 | except ValueError: |
| 268 | pass |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 269 | time_tuple = time.struct_time((1999,1,3,1,1,1,6,3,0)) |
| 270 | if time.strftime(directive, time_tuple).find('00'): |
| 271 | U_W = '%U' |
| 272 | else: |
| 273 | U_W = '%W' |
| 274 | date_time[offset] = current_format.replace('11', U_W) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 275 | if not self.__LC_date_time: |
| 276 | self.__LC_date_time = date_time[0] |
| 277 | if not self.__LC_date: |
| 278 | self.__LC_date = date_time[1] |
| 279 | if not self.__LC_time: |
| 280 | self.__LC_time = date_time[2] |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 281 | |
| 282 | def __calc_timezone(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 283 | # Set self.__timezone by using time.tzname. |
| 284 | # |
| 285 | # Empty string used for matching when timezone is not used/needed such |
| 286 | # as with UTC. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 287 | self.__timezone = self.__pad(time.tzname, 0) |
| 288 | |
| 289 | def __calc_lang(self): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 290 | # Set self.lang by using locale.getlocale() or |
| 291 | # locale.getdefaultlocale(). |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 292 | current_lang = locale.getlocale(locale.LC_TIME)[0] |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 293 | if current_lang: |
| 294 | self.__lang = current_lang |
| 295 | else: |
| 296 | self.__lang = locale.getdefaultlocale()[0] |
| 297 | |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 298 | |
| 299 | class TimeRE(dict): |
| 300 | """Handle conversion from format directives to regexes.""" |
| 301 | |
| 302 | def __init__(self, locale_time=LocaleTime()): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 303 | """Init inst with non-locale regexes and store LocaleTime object.""" |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 304 | super(TimeRE,self).__init__({ |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 305 | # The " \d" option is to make %c from ANSI C work |
| 306 | 'd': r"(?P<d>3[0-1]|[0-2]\d|\d| \d)", |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 307 | 'H': r"(?P<H>2[0-3]|[0-1]\d|\d)", |
| 308 | 'I': r"(?P<I>0\d|1[0-2]|\d)", |
| 309 | 'j': r"(?P<j>(?:3[0-5]\d|6[0-6])|[0-2]\d\d|\d)", |
| 310 | 'm': r"(?P<m>0\d|1[0-2]|\d)", |
| 311 | 'M': r"(?P<M>[0-5]\d|\d)", |
| 312 | 'S': r"(?P<S>6[0-1]|[0-5]\d|\d)", |
| 313 | 'U': r"(?P<U>5[0-3]|[0-4]\d|\d)", |
| 314 | 'w': r"(?P<w>[0-6])", |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 315 | 'W': r"(?P<W>5[0-3]|[0-4]\d|\d)", # Same as U |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 316 | 'y': r"(?P<y>\d\d)", |
| 317 | 'Y': r"(?P<Y>\d\d\d\d)"}) |
| 318 | self.locale_time = locale_time |
| 319 | |
| 320 | def __getitem__(self, fetch): |
| 321 | """Try to fetch regex; if it does not exist, construct it.""" |
| 322 | try: |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 323 | return super(TimeRE, self).__getitem__(fetch) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 324 | except KeyError: |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 325 | constructors = { |
| 326 | 'A': lambda: self.__seqToRE(self.locale_time.f_weekday, fetch), |
| 327 | 'a': lambda: self.__seqToRE(self.locale_time.a_weekday, fetch), |
| 328 | 'B': lambda: self.__seqToRE(self.locale_time.f_month[1:], |
| 329 | fetch), |
| 330 | 'b': lambda: self.__seqToRE(self.locale_time.a_month[1:], |
| 331 | fetch), |
| 332 | 'c': lambda: self.pattern(self.locale_time.LC_date_time), |
| 333 | 'p': lambda: self.__seqToRE(self.locale_time.am_pm, fetch), |
| 334 | 'x': lambda: self.pattern(self.locale_time.LC_date), |
| 335 | 'X': lambda: self.pattern(self.locale_time.LC_time), |
| 336 | 'Z': lambda: self.__seqToRE(self.locale_time.timezone, fetch), |
| 337 | '%': lambda: '%', |
| 338 | } |
| 339 | if fetch in constructors: |
| 340 | self[fetch] = constructors[fetch]() |
| 341 | return self[fetch] |
| 342 | else: |
| 343 | raise |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 344 | |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 345 | def __seqToRE(self, to_convert, directive): |
| 346 | """Convert a list to a regex string for matching directive.""" |
| 347 | def sorter(a, b): |
| 348 | """Sort based on length. |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 349 | |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 350 | Done in case for some strange reason that names in the locale only |
| 351 | differ by a suffix and thus want the name with the suffix to match |
| 352 | first. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 353 | """ |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 354 | try: |
| 355 | a_length = len(a) |
| 356 | except TypeError: |
| 357 | a_length = 0 |
| 358 | try: |
| 359 | b_length = len(b) |
| 360 | except TypeError: |
| 361 | b_length = 0 |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 362 | return cmp(b_length, a_length) |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 363 | |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 364 | to_convert = to_convert[:] # Don't want to change value in-place. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 365 | to_convert.sort(sorter) |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 366 | regex = '|'.join(to_convert) |
| 367 | regex = '(?P<%s>%s' % (directive, regex) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 368 | return '%s)' % regex |
| 369 | |
| 370 | def pattern(self, format): |
| 371 | """Return re pattern for the format string.""" |
| 372 | processed_format = '' |
| 373 | for whitespace in whitespace_string: |
| 374 | format = format.replace(whitespace, r'\s*') |
| 375 | while format.find('%') != -1: |
| 376 | directive_index = format.index('%')+1 |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 377 | processed_format = "%s%s%s" % (processed_format, |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 378 | format[:directive_index-1], |
| 379 | self[format[directive_index]]) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 380 | format = format[directive_index+1:] |
| 381 | return "%s%s" % (processed_format, format) |
| 382 | |
| 383 | def compile(self, format): |
| 384 | """Return a compiled re object for the format string.""" |
| 385 | format = "(?#%s)%s" % (self.locale_time.lang,format) |
| 386 | return re_compile(self.pattern(format), IGNORECASE) |
| 387 | |
| 388 | |
| 389 | def strptime(data_string, format="%a %b %d %H:%M:%S %Y"): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 390 | """Return a time struct based on the input data and the format string. |
Tim Peters | 469cdad | 2002-08-08 20:19:19 +0000 | [diff] [blame] | 391 | |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 392 | The format argument may either be a regular expression object compiled by |
| 393 | strptime(), or a format string. If False is passed in for data_string |
| 394 | then the re object calculated for format will be returned. The re object |
| 395 | must be used with the same locale as was used to compile the re object. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 396 | """ |
| 397 | locale_time = LocaleTime() |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 398 | if isinstance(format, RegexpType): |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 399 | if format.pattern.find(locale_time.lang) == -1: |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 400 | raise TypeError("re object not created with same language as " |
| 401 | "LocaleTime instance") |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 402 | else: |
| 403 | compiled_re = format |
| 404 | else: |
| 405 | compiled_re = TimeRE(locale_time).compile(format) |
| 406 | if data_string is False: |
| 407 | return compiled_re |
| 408 | else: |
| 409 | found = compiled_re.match(data_string) |
| 410 | if not found: |
| 411 | raise ValueError("time data did not match format") |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 412 | year = month = day = hour = minute = second = weekday = julian = tz =-1 |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 413 | found_dict = found.groupdict() |
| 414 | for group_key in found_dict.iterkeys(): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 415 | if group_key == 'y': |
| 416 | year = int("%s%s" % |
| 417 | (time.strftime("%Y")[:-2], found_dict['y'])) |
| 418 | elif group_key == 'Y': |
| 419 | year = int(found_dict['Y']) |
| 420 | elif group_key == 'm': |
| 421 | month = int(found_dict['m']) |
| 422 | elif group_key == 'B': |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 423 | month = _insensitiveindex(locale_time.f_month, found_dict['B']) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 424 | elif group_key == 'b': |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 425 | month = _insensitiveindex(locale_time.a_month, found_dict['b']) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 426 | elif group_key == 'd': |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 427 | day = int(found_dict['d']) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 428 | elif group_key is 'H': |
| 429 | hour = int(found_dict['H']) |
| 430 | elif group_key == 'I': |
| 431 | hour = int(found_dict['I']) |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 432 | ampm = found_dict.get('p', '').lower() |
| 433 | # If there was no AM/PM indicator, we'll treat this like AM |
| 434 | if ampm in ('', locale_time.am_pm[0].lower()): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 435 | # We're in AM so the hour is correct unless we're |
| 436 | # looking at 12 midnight. |
| 437 | # 12 midnight == 12 AM == hour 0 |
| 438 | if hour == 12: |
| 439 | hour = 0 |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 440 | elif ampm == locale_time.am_pm[1].lower(): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 441 | # We're in PM so we need to add 12 to the hour unless |
| 442 | # we're looking at 12 noon. |
| 443 | # 12 noon == 12 PM == hour 12 |
| 444 | if hour != 12: |
| 445 | hour += 12 |
| 446 | elif group_key == 'M': |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 447 | minute = int(found_dict['M']) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 448 | elif group_key == 'S': |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 449 | second = int(found_dict['S']) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 450 | elif group_key == 'A': |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 451 | weekday = _insensitiveindex(locale_time.f_weekday, |
| 452 | found_dict['A']) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 453 | elif group_key == 'a': |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 454 | weekday = _insensitiveindex(locale_time.a_weekday, |
| 455 | found_dict['a']) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 456 | elif group_key == 'w': |
| 457 | weekday = int(found_dict['w']) |
| 458 | if weekday == 0: |
| 459 | weekday = 6 |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 460 | else: |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 461 | weekday -= 1 |
| 462 | elif group_key == 'j': |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 463 | julian = int(found_dict['j']) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 464 | elif group_key == 'Z': |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 465 | found_zone = found_dict['Z'].lower() |
| 466 | if locale_time.timezone[0].lower() == found_zone: |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 467 | tz = 0 |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 468 | elif locale_time.timezone[1].lower() == found_zone: |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 469 | tz = 1 |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 470 | elif locale_time.timezone[2].lower() == found_zone: |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 471 | tz = 0 |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 472 | #XXX <bc>: If calculating fxns are never exposed to the general |
| 473 | # populous then just inline calculations. |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 474 | if julian == -1 and year != -1 and month != -1 and day != -1: |
| 475 | julian = julianday(year, month, day) |
| 476 | if (month == -1 or day == -1) and julian != -1 and year != -1: |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 477 | year, month, day = gregorian(julian, year) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 478 | if weekday == -1 and year != -1 and month != -1 and day != -1: |
| 479 | weekday = dayofweek(year, month, day) |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 480 | return time.struct_time( |
| 481 | (year,month,day,hour,minute,second,weekday, julian,tz)) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 482 | |
Barry Warsaw | 4d895fa | 2002-09-23 22:46:49 +0000 | [diff] [blame] | 483 | def _insensitiveindex(lst, findme): |
| 484 | # Perform a case-insensitive index search. |
| 485 | |
| 486 | #XXX <bc>: If LocaleTime is not exposed, then consider removing this and |
| 487 | # just lowercase when LocaleTime sets its vars and lowercasing |
| 488 | # search values. |
| 489 | findme = findme.lower() |
| 490 | for key,item in enumerate(lst): |
| 491 | if item.lower() == findme: |
| 492 | return key |
| 493 | else: |
| 494 | raise ValueError("value not in list") |
| 495 | |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 496 | def firstjulian(year): |
| 497 | """Calculate the Julian date up until the first of the year.""" |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 498 | return ((146097 * (year + 4799)) // 400) - 31738 |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 499 | |
| 500 | def julianday(year, month, day): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 501 | """Calculate the Julian day since the beginning of the year. |
| 502 | Calculated from the Gregorian date. |
| 503 | """ |
| 504 | a = (14 - month) // 12 |
| 505 | return (day - 32045 |
| 506 | + (((153 * (month + (12 * a) - 3)) + 2) // 5) |
| 507 | + ((146097 * (year + 4800 - a)) // 400)) - firstjulian(year) + 1 |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 508 | |
| 509 | def gregorian(julian, year): |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 510 | """Return 3-item list containing Gregorian date based on the Julian day.""" |
| 511 | a = 32043 + julian + firstjulian(year) |
| 512 | b = ((4 * a) + 3) // 146097 |
| 513 | c = a - ((146097 * b) // 4) |
| 514 | d = ((4 * c) + 3) // 1461 |
| 515 | e = c - ((1461 * d) // 4) |
| 516 | m = ((5 * e) + 2) // 153 |
| 517 | day = 1 + e - (((153 * m) + 2) // 5) |
| 518 | month = m + 3 - (12 * (m // 10)) |
| 519 | year = (100 * b) + d - 4800 + (m // 10) |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 520 | return [year, month, day] |
| 521 | |
| 522 | def dayofweek(year, month, day): |
| 523 | """Calculate the day of the week (Monday is 0).""" |
Barry Warsaw | 35816e6 | 2002-08-29 16:24:50 +0000 | [diff] [blame] | 524 | a = (14 - month) // 12 |
| 525 | y = year - a |
| 526 | weekday = (day + y + ((97 * y) // 400) |
| 527 | + ((31 * (month + (12 * a) -2 )) // 12)) % 7 |
Guido van Rossum | 00efe7e | 2002-07-19 17:04:46 +0000 | [diff] [blame] | 528 | if weekday == 0: |
| 529 | return 6 |
| 530 | else: |
| 531 | return weekday-1 |