projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| aca310e5 RD |
1 | #---------------------------------------------------------------------------- |
| 2 | # Name: datetimeparser.py | |
| 3 | # | |
| 4 | # Purpose: - Instantiate datetime.datetime/date instance from a string | |
| 5 | # date representation. | |
| 6 | # Uses dateutil from http://labix.org/python-dateutil. | |
| 7 | # | |
| 8 | # - Creates string representation of datetime/date instance. | |
| 9 | # | |
| 10 | # | |
| 11 | # Author: Simon Toens | |
| 12 | # | |
| 13 | # Created: 28-Feb-06 | |
| 14 | # CVS-ID: | |
| 15 | # Copyright: (c) 2005 ActiveGrid, Inc. | |
| 16 | # License: wxWindows License | |
| 17 | #---------------------------------------------------------------------------- | |
| 18 | ||
| 19 | import datetime | |
| 20 | ||
| 21 | try: | |
| 22 | import dateutil.parser | |
| 23 | DATEUTIL_INSTALLED = True | |
| 24 | except ImportError: | |
| 25 | DATEUTIL_INSTALLED = False | |
| 26 | ||
| 27 | ISO_8601_DATE_FORMAT = "%Y-%m-%d" | |
| 28 | ISO_8601_TIME_FORMAT = "%H:%M:%S" | |
| 29 | ISO_8601_DATETIME_FORMAT = "%s %s" %(ISO_8601_DATE_FORMAT, | |
| 30 | ISO_8601_TIME_FORMAT) | |
| 31 | ||
| 32 | DEFAULT_DATETIME = datetime.datetime(1, 1, 1, 0, 0, 0, 0) | |
| 33 | ||
| 34 | ||
| 35 | def format(dateobj, formatstr=None): | |
| 36 | if (formatstr != None and _isDateTimeObject(dateobj)): | |
| 37 | return dateobj.strftime(str(formatstr)) | |
| 38 | return str(dateobj) | |
| 39 | ||
| 40 | ||
| 41 | def parse(datestr, formatstr=None, asdate=False, astime=False): | |
| 42 | """Instantiates and returns a datetime instance from the datestr datetime | |
| 43 | representation. | |
| 44 | ||
| 45 | Optionally, a format string may be used. The format is only loosely | |
| 46 | interpreted, its only purpose beeing to determine if the year is first | |
| 47 | or last in datestr, and whether the day is in front or follows the | |
| 48 | month. If no formatstr is passed in, dateutil tries its best to parse | |
| 49 | the datestr. The default date format is YYYY-mm-dd HH:SS. | |
| 50 | ||
| 51 | If asdate is True, returns a date instance instead of a datetime | |
| 52 | instance, if astime is True, returns a time instance instead of a | |
| 53 | datetime instance.""" | |
| 54 | ||
| 55 | ||
| 56 | dayfirst, yearfirst = _getDayFirstAndYearFirst(formatstr) | |
| 57 | ||
| 58 | rtn = None | |
| 59 | ||
| 60 | try: | |
| 61 | if DATEUTIL_INSTALLED: | |
| 62 | rtn = dateutil.parser.parse(str(datestr), fuzzy=True, | |
| 63 | dayfirst=dayfirst, yearfirst=yearfirst, | |
| 64 | default=DEFAULT_DATETIME) | |
| 65 | else: | |
| 66 | rtn = DEFAULT_DATETIME | |
| 67 | except: | |
| 68 | rtn = DEFAULT_DATETIME | |
| 69 | ||
| 70 | if (asdate and isinstance(rtn, datetime.datetime)): | |
| 71 | rtn = datetime.date(rtn.year, rtn.month, rtn.day) | |
| 72 | elif (astime and isinstance(rtn, datetime.datetime)): | |
| 73 | rtn = datetime.time(rtn.hour, rtn.minute, rtn.second, rtn.microsecond) | |
| 74 | ||
| 75 | return rtn | |
| 76 | ||
| 77 | ||
| 78 | def _isDateTimeObject(obj): | |
| 79 | return (isinstance(obj, datetime.datetime) or | |
| 80 | isinstance(obj, datetime.date) or | |
| 81 | isinstance(obj, datetime.time)) | |
| 82 | ||
| 83 | ||
| 84 | def _getDayFirstAndYearFirst(formatstr): | |
| 85 | dayFirst = False | |
| 86 | yearFirst = False | |
| 87 | ||
| 88 | gotYear = False | |
| 89 | gotMonth = False | |
| 90 | gotDay = False | |
| 91 | ||
| 92 | if (formatstr == None): | |
| 93 | formatstr = "" | |
| 94 | ||
| 95 | for c in formatstr: | |
| 96 | if (c.lower() == "y"): | |
| 97 | if (gotYear): | |
| 98 | continue | |
| 99 | if (not gotDay and not gotMonth): | |
| 100 | yearFirst = True | |
| 101 | gotYear = True | |
| 102 | ||
| 103 | elif (c.lower() == "m"): | |
| 104 | if (gotMonth): | |
| 105 | continue | |
| 106 | if (not gotDay): | |
| 107 | dayFirst = False | |
| 108 | gotMonth = True | |
| 109 | ||
| 110 | elif (c.lower() == "d"): | |
| 111 | if (gotDay): | |
| 112 | continue | |
| 113 | if (not gotMonth): | |
| 114 | dayFirst = True | |
| 115 | gotDay = True | |
| 116 | ||
| 117 | ||
| 118 | return dayFirst, yearFirst |