Package DateHandler :: Module _DateParser :: Class DateParser

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Class DateParser

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Converts a text string into a Date object. If the date cannot be converted, the text string is assigned.

Instance Methods

__init__(self)

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init_strings(self)
This method compiles regular expression strings for matching dates.

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invert_year(self, subdate)

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match_bce(self, text)
Try matching BCE qualifier.

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match_calendar(self, text, cal)
Try parsing calendar.

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match_modifier(self, text, cal, qual, bc, date)
Try matching date with modifier.

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match_quality(self, text, qual)
Try matching quality.

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match_range(self, text, cal, qual, date)
Try matching range date.

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match_span(self, text, cal, qual, date)
Try matching span date.

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parse(self, text)
Parses the text, returning a Date object.

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re_longest_first(self, keys)
returns a string for a RE group which contains the given keys sorted so that longest keys match first.

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set_date(self, date, text)
Parses the text and sets the date according to the parsing.

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Class Variables
	bce = `['B.C.E.', 'B.C.E', 'B.C.', 'BCE', 'B.C', 'BC']`
	calendar_to_int = `{'f': 3, 'french': 3, 'french republican': 3...`
	french_to_int = `{u'brumaire': 2, u'extra': 13, u'flor\xe9al': ...`
	hebrew_to_int = `{'adari': 6, 'adarii': 7, 'av': 12, 'elul': 13...`
	islamic_to_int = `{'dhu hijja': 12, 'dhu l-hijja': 12, 'dhu l-q...`
	modifier_after_to_int = `{}`
	modifier_to_int = `{'about': 3, 'abt': 3, 'abt.': 3, 'aft': 2, ...`
	month_to_int = `{u'10ber': 12, u'10bre': 12, u'10bris': 12, u'7...`
	persian_to_int = `{'aban': 8, 'azar': 9, 'bahman': 11, 'dey': 1...`
	quality_to_int = `{'calc': 2, 'calc.': 2, 'calculated': 2, 'est...`

Method Details

init_strings(self)

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This method compiles regular expression strings for matching dates.

Most of the re's in most languages can stay as is. span and range most likely will need to change. Whatever change is done, this method may be called first as DateParser.init_strings(self) so that the invariant expresions don't need to be repeteadly coded. All differences can be coded after DateParser.init_strings(self) call, that way they override stuff from this method. See DateParserRU() as an example.

match_bce(self, text)

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Try matching BCE qualifier.

Return BCE (True/False) and the text with matched part removed.

match_calendar(self, text, cal)

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Try parsing calendar.

Return calendar index and the text with calendar removed.

match_modifier(self, text, cal, qual, bc, date)

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Try matching date with modifier.

On success, set the date and return 1. On failure return 0.

match_quality(self, text, qual)

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Try matching quality.

Return quality index and the text with quality removed.

match_range(self, text, cal, qual, date)

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Try matching range date.

On success, set the date and return 1. On failure return 0.

match_span(self, text, cal, qual, date)

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Try matching span date.

On success, set the date and return 1. On failure return 0.

re_longest_first(self, keys)

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returns a string for a RE group which contains the given keys sorted so that longest keys match first. Any '.' characters are quoted.

Class Variable Details

calendar_to_int

Value:

{'f': 3,
 'french': 3,
 'french republican': 3,
 'g': 0,
 'gregorian': 0,
 'h': 2,
 'hebrew': 2,
 'i': 5,
...

french_to_int

Value:

{u'brumaire': 2,
 u'extra': 13,
 u'flor\xe9al': 8,
 u'frimaire': 3,
 u'fructidor': 12,
 u'germinal': 7,
 u'messidor': 10,
 u'niv\xf4se': 4,
...

hebrew_to_int

Value:

{'adari': 6,
 'adarii': 7,
 'av': 12,
 'elul': 13,
 'heshvan': 2,
 'iyyar': 9,
 'kislev': 3,
 'nisan': 8,
...

islamic_to_int

Value:

{'dhu hijja': 12,
 'dhu l-hijja': 12,
 'dhu l-qa`da': 11,
 'dhu qadah': 11,
 'jumaada al-thaany': 6,
 'jumaada i': 5,
 'jumaada ii': 5,
 'jumaada-ul-akhir': 6,
...

modifier_to_int

Value:

{'about': 3,
 'abt': 3,
 'abt.': 3,
 'aft': 2,
 'aft.': 2,
 'after': 2,
 'around': 3,
 'bef': 1,
...

month_to_int

Value:

{u'10ber': 12,
 u'10bre': 12,
 u'10bris': 12,
 u'7ber': 9,
 u'7bre': 9,
 u'7bris': 9,
 u'8ber': 10,
 u'8bre': 10,
...

persian_to_int

Value:

{'aban': 8,
 'azar': 9,
 'bahman': 11,
 'dey': 10,
 'esfand': 12,
 'farvardin': 1,
 'khordad': 3,
 'mehr': 7,
...

quality_to_int

Value:

{'calc': 2,
 'calc.': 2,
 'calculated': 2,
 'est': 1,
 'est.': 1,
 'estimated': 1}