mtp/machamp/dataset_readers/lemma_edit.py
def apply_lemma_rule(form, lemma_rule):
    """
    Applies the lemma rule to the form to generate the lemma
    """
    if lemma_rule.startswith('@@'): # for @@UNK, to avoid crash
        return form
    casing, rule = lemma_rule.split(";", 1)
    if rule.startswith("a"):
        lemma = rule[1:]
    else:
        form = form.lower()
        rules, rule_sources = rule[1:].split("¦"), []
        assert len(rules) == 2
        for rule in rules:
            source, i = 0, 0
            while i < len(rule):
                if rule[i] == "→" or rule[i] == "-":
                    source += 1
                else:
                    assert rule[i] == "+"
                    i += 1
                i += 1
            rule_sources.append(source)

        try:
            lemma, form_offset = "", 0
            for i in range(2):
                j, offset = 0, (0 if i == 0 else len(form) - rule_sources[1])
                while j < len(rules[i]):
                    if rules[i][j] == "→":
                        lemma += form[offset]
                        offset += 1
                    elif rules[i][j] == "-":
                        offset += 1
                    else:
                        assert(rules[i][j] == "+")
                        lemma += rules[i][j + 1]
                        j += 1
                    j += 1
                if i == 0:
                    lemma += form[rule_sources[0]: len(form) - rule_sources[1]]
        except:
            lemma = form

    for rule in casing.split("¦"):
        if rule == "↓0": continue  # The lemma is lowercased initially
        case, offset = rule[0], int(rule[1:])
        lemma = lemma[:offset] + (lemma[offset:].upper() if case == "↑" else lemma[offset:].lower())

    return lemma

    Applies the lemma rule to the form to generate the lemma
    
Applies the lemma rule to the form to generate the lemma
Applies the lemma rule to the form to generate the lemma
def apply_lemma_rule(form, lemma_rule):
    if lemma_rule.startswith('@@'): 
        return form
    casing, rule = lemma_rule.split(";", 1)
    if rule.startswith("a"):
        lemma = rule[1:]
    else:
        form = form.lower()
        rules, rule_sources = rule[1:].split("¦"), []
        assert len(rules) == 2
        for rule in rules:
            source, i = 0, 0
            while i < len(rule):
                if rule[i] == "→" or rule[i] == "-":
                    source += 1
                else:
                    assert rule[i] == "+"
                    i += 1
                i += 1
            rule_sources.append(source)
        try:
            lemma, form_offset = "", 0
            for i in range(2):
                j, offset = 0, (0 if i == 0 else len(form) - rule_sources[1])
                while j < len(rules[i]):
                    if rules[i][j] == "→":
                        lemma += form[offset]
                        offset += 1
                    elif rules[i][j] == "-":
                        offset += 1
                    else:
                        assert(rules[i][j] == "+")
                        lemma += rules[i][j + 1]
                        j += 1
                    j += 1
                if i == 0:
                    lemma += form[rule_sources[0]: len(form) - rule_sources[1]]
        except:
            lemma = form
    for rule in casing.split("¦"):
        if rule == "↓0": continue  # 
        case, offset = rule[0], int(rule[1:])
        lemma = lemma[:offset] + (lemma[offset:].upper() if case == "↑" else lemma[offset:].lower())
    return lemma
def apply_lemma_rule ( form , lemma_rule ) : if lemma_rule . startswith ( '@@' ) : return form casing , rule = lemma_rule . split ( ";" , 1 ) if rule . startswith ( "a" ) : lemma = rule [ 1 : ] else : form = form . lower ( ) rules , rule_sources = rule [ 1 : ] . split ( "¦") , ] assert len ( rules ) == 2 for rule in rules : source , i = 0 , 0 while i < len ( rule ) : if rule [ i ] == "→" o  r le[i ] =  " ": source += 1 else : assert rule [ i ] == "+" i += 1 i += 1 rule_sources . append ( source ) try : lemma , form_offset = "" , 0 for i in range ( 2 ) : j , offset = 0 , ( 0 if i == 0 else len ( form ) - rule_sources [ 1 ] ) while j < len ( rules [ i ] ) : if rules [ i ] [ j ] == "→": lemma += form [ offset ] offset += 1 elif rules [ i ] [ j ] == "-" : offset += 1 else : assert ( rules [ i ] [ j ] == "+" ) lemma += rules [ i ] [ j + 1 ] j += 1 j += 1 if i == 0 : lemma += form [ rule_sources [ 0 ] : len ( form ) - rule_sources [ 1 ] ] except : lemma = form for rule in casing . split ( "¦") : if rule == "↓0":  c ntinue   case , offset = rule [ 0 ] , int ( rule [ 1 : ] ) lemma = lemma [ : offset ] + ( lemma [ offset : ] . upper ( ) if case == "↑" e se l mma[o f fset:] . l o wer() ) return lemma
Applies the lemma rule to the form to generate the lemma
Applies the lemma rule to the form to generate the lemma
"""
    Applies the lemma rule to the form to generate the lemma
    """ # for @@UNK, to avoid crash The lemma is lowercased initially
form
lemma_rule