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Code: Alles auswählen

s = '("w1" "w2" ("w3" "w4") ("w5") "w6" ("w7"))'

Code: Alles auswählen

index[1:-1]

Code: Alles auswählen

In [1]: s = '("w1" "w2" ("w3" "w4") ("w5") "w6" ("w7"))'

In [2]: s[1:-1]
Out[2]: '"w1" "w2" ("w3" "w4") ("w5") "w6" ("w7")'

Code: Alles auswählen

from pyparsing import QuotedString, Forward, Group, Suppress, ZeroOrMore


def main():
    TUPLE = Forward()
    TUPLE << Group(
        Suppress('(') + ZeroOrMore(QuotedString('"') | TUPLE) + Suppress(')')
    ).setParseAction(lambda toks: tuple(toks[0]))
    ast = TUPLE.parseString('("w1" "w2" ("w3" "w4") ("w5") "w6" ("w7"))')
    print ast[0]


if __name__ == '__main__':
    main()

Code: Alles auswählen

#!/usr/bin/env python
# coding: utf-8

import re

TOKENS = re.compile(r'(?P<bl>\()|(?P<br>\))|(?P<data>\w+)|\s')


def tokenize(data):
    for token in re.finditer(TOKENS, data):
        yield token


def loads(data):
    stack = [[]]
    for token in tokenize(data):
        if token.group("bl"):
            stack.append(list())
        elif token.group("br"):
            tmp = tuple(stack.pop())
            stack[-1].append(tmp)
        elif token.group("data"):
            stack[-1].append(token.group())
        else:
            continue
    return stack.pop().pop()


if __name__ == "__main__":
    data = '("w1" "w2" ("w3" "w4") ("w5") "w6" ("w7"))'
    print loads(data)

Code: Alles auswählen

import re
from pprint import pprint

SOURCE = '''\
(
   ("TEXT" "PLAIN" ("CHARSET" "utf-8") NIL NIL "QUOTED-PRINTABLE" 871 27 NIL NIL NIL)
   (
      ("TEXT" "HTML" ("CHARSET" "utf-8") NIL NIL "QUOTED-PRINTABLE" 2275 29 NIL NIL NIL)
      ("APPLICATION" "VND.OASIS.OPENDOCUMENT.TEXT" ("NAME" "Ethische Problemfelder.odt") NIL NIL "BASE64" 875794 NIL ("ATTACHMENT" ("FILENAME" "Ethische Problemfelder.odt")) NIL)
      ("TEXT" "HTML" ("CHARSET" "utf-8") NIL NIL "7BIT" 92 0 NIL NIL NIL) "MIXED" ("BOUNDARY" "Apple-Mail-4-784936864") NIL NIL
   ) "ALTERNATIVE" ("BOUNDARY" "Apple-Mail-3-784936862") NIL NIL
)'''


def pattern_dispatch(patterns_and_actions, source):
    regex = re.compile('|'.join('(%s)' % r for r, _ in patterns_and_actions))
    actions = [a for _, a in patterns_and_actions]
    i = 0
    for match in iter(lambda: regex.match(source, i), None):
        actions[match.lastindex - 1](match.group())
        i = match.end()
    return i


def parse(source):
    stack = [[]]
    pattern_dispatch(
        [
            (r'\(', lambda _: stack.append(list())),
            (r'\)', lambda _: stack[-2].append(tuple(stack.pop()))),
            (r'NIL', lambda _: stack[-1].append(None)),
            (r'[0-9]+', lambda t: stack[-1].append(int(t))),
            (r'"[^"]*"', lambda t: stack[-1].append(t[1:-1])),
            (r'\s+', lambda _: None),
        ],
        source
    )
    return stack[0][0]


def main():
    pprint(parse(SOURCE))