Python 用简约法解析成分列表 来自节俭语法导入语法 语法=语法( ''' #项目=（（配料+）（“配料+）”逗号ws？+/逗号+/ws+/配料）+ 项目=（（成分“（“成分”））/成分）+ 成分=（（粗体标记词+ws百分比？+逗号ws？） word=~“[A-Z0-9::+”i ws=~“\s*”+ 逗号=“，” bold_tag=“” 百分比=~“\（[\d\.%]+\）” ''') 语法=语法( """ 成分项目=单词开括号（子成分）*闭括号逗号 text_前面的_冒号=（text冒号）* text=~“[A-Z 0-9]*”i 空格=~“[\\s]*” 冒号=：“ 单词=文本+ 打开_括号=“（” 闭式_括号=“）” 子成分=文本/b_标签/百分比 百分比=开括号百分比闭括号数 百分比\u num=~“[0-9\.%]*” b_tag=“” 逗号=“，” """) 语法=语法( ''' 项目=（成分+逗号？）+ 成分=单词？/bold\U标签？/ws？/百分比？ 逗号='，' word=~“[A-Z0-9::+”i bold_tag=“” ws=~“\s*” 百分比=~“\（[\d\.%]+\）” ''' ) 测试字符串=''部分倒置的红糖糖浆（43.3%），盐，酸度调节剂：磷酸三钾，葵花籽油'' 测试字符串=测试字符串。解码（'utf-8'） tree=grammar.parse（测试字符串）

嗨，我正试图用简约来解析一份配料表，但没有任何运气。以上是我迄今为止试图写的所有语法。我想用逗号将其拆分为各个组成部分，忽略嵌套括号，如下面更复杂的测试字符串中所示：

from parsimonious.grammar import Grammar

grammar = Grammar(
     '''
     # item = ( ( ingredient+ '(' ingredient+ ')' comma ws?) + / comma+ / ws+ / ingredient )+
     item = ((ingredient '(' ingredient ')') / ingredient )+

     ingredient = ( ( bold_tag? word+ ws? percent? )+ comma? ws? )
     word = ~"[A-Z0-9:]+"i
     ws = ~"\s*"+
     comma = ","
     bold_tag = "<b>"
     percent = ~"\([\d\.%]+\)"
     ''')

grammar = Grammar(
     """
     ingredient_item = words open_bracket (subingredient)* closed_bracket comma
     text_preceding_colon = (text colon)*
     text       = ~"[A-Z 0-9]*"i
     space = ~"[\\s]*"
     colon = ":"
     words = text+
     open_bracket = "("
     closed_bracket = ")"
     subingredient = text / b_tag / percentage
     percentage = open_bracket percentage_num closed_bracket
     percentage_num = ~"[0-9\.%]*"
     b_tag = "<b>"
     comma = ","
     """)

grammar = Grammar(
     '''
     item = (ingredient+ comma? )+
     ingredient = word? / bold_tag? / ws? / percent?
     comma = ','
     word = ~"[A-Z0-9:]+"i
     bold_tag = "<b>"
     ws = ~"\s*"
     percent = ~"\([\d\.%]+\)"
     '''
)

test_string = '''Partially Inverted <b>Brown <b>Sugar Syrup (43.3%), Salt, Acidity Regulator: Tripotassium Phosphate, Sunflower Oil'''

test_string = test_string.decode('utf-8')

tree = grammar.parse(test_string)

test_string2=''谷物（全麦燕麦粉（28.3%）、全麦小麦（28.3%）、全麦大麦粉（17.1%）、全麦玉米粉（2.0%）、全麦米粉（2.0%）、糖、小麦淀粉、部分倒红糖糖浆、盐、酸度调节剂：磷酸三钾、葵花籽油、色素：胡萝卜素、，焦糖和红木，抗氧化剂：生育酚，维生素和矿物质：维生素C，烟酸（B3），泛酸，核黄素（B2），维生素B6，叶酸，维生素D，碳酸钙，铁，为了生产100克本产品，我们使用了77.7克全谷物，我们保证每一份带有绿色横幅的雀巢麦片每餐至少含有8克全麦

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每种成分可能都有一份子成分列表，并附上'（“或百分比，或像“B2”这样的单词，由一个或多个单词组成。

你能举一个最终结构的例子吗？正如代码中所说，最终结构是一棵树。无论如何，我基本上已经放弃了这一点，只是按空格分割成标记，解析每个单词，同时跟踪括号的数量，只开始一个新的ph如果支架深度为零，则刷新。

test_string2 = '''Cereal Grains (Whole Grain <b>Oat Flour (28.3%), Whole Grain <b>Wheat (28.3%), Whole Grain <b>Barley Flour (17.1%), Whole Grain Maize Flour (2.0%), Whole Grain Rice Flour (2.0%)), Sugar, <b>Wheat Starch, Partially Inverted Brown Sugar Syrup, Salt, Acidity Regulator: Tripotassium Phosphate, Sunflower Oil, Colours: Carotene, Caramel and Annatto, Antioxidant: Tocopherols, Vitamins and Minerals: Vitamin C, Niacin (B3), Pantothenic Acid, Riboflavin (B2), Vitamin B6, Folic Acid, Vitamin D, Calcium Carbonate, Iron, To produce 100g of this product we have used 77.7g of Whole Grain, We guarantee every Nestlé Cereal with the green banner contains at least 8g of Whole Grain per serving'''