如何在Pyparsing中捕获运算符之前的所有内容

Question

我正在尝试创建pyparsing语法。我想将空格分隔的实体捕获为运算符“和” /“或”之前的单个单词。

预期结果是：

(United kingdom or Sweden)

['United kingdom','or','Sweden']

我得到的是

['United', 'kingdom','or','Sweden']

到目前为止的代码

from pyparsing import *

import json

QUOTED = quotedString.setParseAction(removeQuotes)

OAND = CaselessLiteral("and")

OOR = CaselessLiteral("or")

ONOT = CaselessLiteral("not")

WORDWITHSPACE = Combine(OneOrMore(Word(printables.replace("(", "").replace(")", "")) | White(

    ' ') + ~(White() | OAND | ONOT | OOR)))

TERM = (QUOTED | WORDWITHSPACE)

EXPRESSION = operatorPrecedence(TERM,

                                [

                                    (ONOT, 1, opAssoc.RIGHT),

                                    (OAND, 2, opAssoc.LEFT),

                                    (OOR, 2, opAssoc.LEFT)

                                ])

STRING = OneOrMore(EXPRESSION) + StringEnd()

Answer 1

我重新定义了WORDWITHSPACE，如下所示：# space-separated words are easiest to define using just OneOrMore# must use a negative lookahead for and/not/or operators, and this must come# at the beginning of the expressionWORDWITHSPACE = OneOrMore(~(OAND | ONOT | OOR) + Word(printables, excludeChars="()"))# use a parse action to recombine words into a single stringWORDWITHSPACE.addParseAction(' '.join)通过对您的代码示例进行的这些更改，我得以编写：tests = """    # basic test    United Kingdom or Sweden    # multiple operators at the same precedence level    United Kingdom or Sweden or France    # implicit grouping by precedence - 'and' is higher prec than 'or    United Kingdom or Sweden and People's Republic of China    # use ()'s to override precedence of 'and' over 'or    (United Kingdom or Sweden) and People's Republic of China    """EXPRESSION.runTests(tests, fullDump=False)并得到# basic testUnited Kingdom or Sweden[['United Kingdom', 'or', 'Sweden']]# multiple operators at the same precedence levelUnited Kingdom or Sweden or France[['United Kingdom', 'or', 'Sweden', 'or', 'France']]# implicit grouping by precedence - 'and' is higher prec than 'orUnited Kingdom or Sweden and People's Republic of China[['United Kingdom', 'or', ['Sweden', 'and', "People's Republic of China"]]]# use ()'s to override precedence of 'and' over 'or(United Kingdom or Sweden) and People's Republic of China[[['United Kingdom', 'or', 'Sweden'], 'and', "People's Republic of China"]]