abydos/stemmer/_snowball_danish.py
def stem(self, word):
        """Return Snowball Danish stem.

        Parameters
        ----------
        word : str
            The word to stem

        Returns
        -------
        str
            Word stem

        Examples
        --------
        >>> stmr = SnowballDanish()
        >>> stmr.stem('underviser')
        'undervis'
        >>> stmr.stem('suspension')
        'suspension'
        >>> stmr.stem('sikkerhed')
        'sikker'

        """
        # lowercase, normalize, and compose
        word = normalize('NFC', text_type(word.lower()))

        r1_start = min(max(3, self._sb_r1(word)), len(word))

        # Step 1
        _r1 = word[r1_start:]
        if _r1[-7:] == 'erendes':
            word = word[:-7]
        elif _r1[-6:] in {'erende', 'hedens'}:
            word = word[:-6]
        elif _r1[-5:] in {
            'ethed',
            'erede',
            'heden',
            'heder',
            'endes',
            'ernes',
            'erens',
            'erets',
        }:
            word = word[:-5]
        elif _r1[-4:] in {
            'ered',
            'ende',
            'erne',
            'eren',
            'erer',
            'heds',
            'enes',
            'eres',
            'eret',
        }:
            word = word[:-4]
        elif _r1[-3:] in {'hed', 'ene', 'ere', 'ens', 'ers', 'ets'}:
            word = word[:-3]
        elif _r1[-2:] in {'en', 'er', 'es', 'et'}:
            word = word[:-2]
        elif _r1[-1:] == 'e':
            word = word[:-1]
        elif _r1[-1:] == 's':
            if len(word) > 1 and word[-2] in self._s_endings:
                word = word[:-1]

        # Step 2
        if word[r1_start:][-2:] in {'gd', 'dt', 'gt', 'kt'}:
            word = word[:-1]

        # Step 3
        if word[-4:] == 'igst':
            word = word[:-2]

        _r1 = word[r1_start:]
        repeat_step2 = False
        if _r1[-4:] == 'elig':
            word = word[:-4]
            repeat_step2 = True
        elif _r1[-4:] == 'løst':
            word = word[:-1]
        elif _r1[-3:] in {'lig', 'els'}:
            word = word[:-3]
            repeat_step2 = True
        elif _r1[-2:] == 'ig':
            word = word[:-2]
            repeat_step2 = True

        if repeat_step2:
            if word[r1_start:][-2:] in {'gd', 'dt', 'gt', 'kt'}:
                word = word[:-1]

        # Step 4
        if (
            len(word[r1_start:]) >= 1
            and len(word) >= 2
            and word[-1] == word[-2]
            and word[-1] not in self._vowels
        ):
            word = word[:-1]

        return word
def stem(self, word):
        """Return Snowball Danish stem.

        Parameters
        ----------
        word : str
            The word to stem

        Returns
        -------
        str
            Word stem

        Examples
        --------
        >>> stmr = SnowballDanish()
        >>> stmr.stem('underviser')
        'undervis'
        >>> stmr.stem('suspension')
        'suspension'
        >>> stmr.stem('sikkerhed')
        'sikker'

        """
        # lowercase, normalize, and compose
        word = normalize('NFC', text_type(word.lower()))

        r1_start = min(max(3, self._sb_r1(word)), len(word))

        # Step 1
        _r1 = word[r1_start:]
        if _r1[-7:] == 'erendes':
            word = word[:-7]
        elif _r1[-6:] in {'erende', 'hedens'}:
            word = word[:-6]
        elif _r1[-5:] in {
            'ethed',
            'erede',
            'heden',
            'heder',
            'endes',
            'ernes',
            'erens',
            'erets',
        }:
            word = word[:-5]
        elif _r1[-4:] in {
            'ered',
            'ende',
            'erne',
            'eren',
            'erer',
            'heds',
            'enes',
            'eres',
            'eret',
        }:
            word = word[:-4]
        elif _r1[-3:] in {'hed', 'ene', 'ere', 'ens', 'ers', 'ets'}:
            word = word[:-3]
        elif _r1[-2:] in {'en', 'er', 'es', 'et'}:
            word = word[:-2]
        elif _r1[-1:] == 'e':
            word = word[:-1]
        elif _r1[-1:] == 's':
            if len(word) > 1 and word[-2] in self._s_endings:
                word = word[:-1]

        # Step 2
        if word[r1_start:][-2:] in {'gd', 'dt', 'gt', 'kt'}:
            word = word[:-1]

        # Step 3
        if word[-4:] == 'igst':
            word = word[:-2]

        _r1 = word[r1_start:]
        repeat_step2 = False
        if _r1[-4:] == 'elig':
            word = word[:-4]
            repeat_step2 = True
        elif _r1[-4:] == 'løst':
            word = word[:-1]
        elif _r1[-3:] in {'lig', 'els'}:
            word = word[:-3]
            repeat_step2 = True
        elif _r1[-2:] == 'ig':
            word = word[:-2]
            repeat_step2 = True

        if repeat_step2:
            if word[r1_start:][-2:] in {'gd', 'dt', 'gt', 'kt'}:
                word = word[:-1]

        # Step 4
        if (
            len(word[r1_start:]) >= 1
            and len(word) >= 2
            and word[-1] == word[-2]
            and word[-1] not in self._vowels
        ):
            word = word[:-1]

        return word
Return Snowball Danish stem.

        Parameters
        ----------
        word : str
            The word to stem

        Returns
        -------
        str
            Word stem

        Examples
        --------
        >>> stmr = SnowballDanish()
        >>> stmr.stem('underviser')
        'undervis'
        >>> stmr.stem('suspension')
        'suspension'
        >>> stmr.stem('sikkerhed')
        'sikker'