Python Convert HTML into JSON using Soup

问题

These are the rules

The HTML tags will start with any of the following , <ol> or <ul>
The content of the HTML when any of step 1 tags is found will contain only the following tags: ,  or 
Map step two tags into the following:  will be this item {"bold":True} in a JSON,  will {"italics":True} and  will be {"decoration":"underline"}
Any text found would be {"text": "this is the text"} in the JSON

Let’s say l have the HTML below: By using this:

soup = Soup("THIS IS THE WHOLE HTML", "html.parser")
allTags = [tag for tag in soup.find_all(recursive=False)]

Which produces this Array:

[
    <p>The name is not mine it is for the people<span style="text-decoration: underline;"><em><strong>stephen</strong></em></span><em><strong> how can</strong>name </em><strong>good</strong> <em>his name <span style="text-decoration: underline;">moneuet</span>please </em><span style="text-decoration: underline;"><strong>forever</strong></span><em>tomorrow<strong>USA</strong></em></p>,
    <p>2</p>,
    <p><strong>moment</strong><em>Africa</em> <em>China</em> <span style="text-decoration: underline;">home</span> <em>thomas</em> <strong>nothing</strong></p>,
    <ol><li>first item</li><li><em><span style="text-decoration: underline;"><strong>second item</strong></span></em></li></ol>
]

By Applying the rules above, this will be the result:

First Array element would be processed into this JSON:

{
    "text": [
        "The name is not mine it is for the people",
        {"text": "stephen", "decoration": "underline", "bold": True, "italics": True}, 
        {"text": "how can", "bold": True, "italics": True},
        {"text": "name", "italics": True},
        {"text": "good", "bold": True},
        {"text": "his name", "italics": True},
        {"text": "moneuet", "decoration": "underline"},
        {"text": "please ", "italics": True},
        {"text": "forever", "decoration": "underline", "bold":True},
        {"text": "tomorrow", "italics": True},
        {"text": "USA", "bold": True, "italics": True}
    ]
}

Second Array element would be processed into this JSON:

{"text": ["2"] }

Third Array element would be processed into this JSON:

{
    "text": [
        {"text": "moment", "bold": True},
        {"text": "Africa", "italics": True},
        {"text": "China", "italics": True},
        {"text": "home", "decoration": "underline"},
        {"text": "thomas", "italics": True},
        {"text": "nothing", "bold": True}
    ]
}

The fourth Array element would be processed into this JSON:

{
    "ol": [
        "first item", 
        {"text": "second item", "decoration": "underline", "italics": True, "bold": True}
    ]
}

This is my attempt so, l am able to drill down. But how to process arrayOfTextAndStyles array is the issue

soup = Soup("THIS IS THE WHOLE HTML", "html.parser")
allTags = [tag for tag in soup.find_all(recursive=False)]
for foundTag in allTags:
   foundTagStyles = [tag for tag in foundTag.find_all(recursive=True)]
      if len(foundTagStyles ) > 0:
         if str(foundTag.name) == "p":
              arrayOfTextAndStyles = [{"tag": tag.name, "text": 
                  foundTag.find_all(text=True, recursive=False) }] +  
                    [{"tag":tag.name, "text": foundTag.find_all(text=True, 
                    recursive=False) } for tag in foundTag.find_all()]

         elif  str(foundTag.name) == "ol":

         elif  str(foundTag .name) == "ul":

回答1:

I'd use a function to parse each element, not use one huge loop. Select on p and ol tags, and raise an exception in your parsing to flag anything that doesn't match your specific rules:

from bs4 import NavigableString

def parse(elem):
    if elem.name == 'ol':
        result = []
        for li in elem.find_all('li'):
            if len(li) > 1:
                result.append([parse_text(sub) for sub in li])
            else:
                result.append(parse_text(next(iter(li))))
        return {'ol': result}
    return {'text': [parse_text(sub) for sub in elem]}

def parse_text(elem):
    if isinstance(elem, NavigableString):
        return {'text': elem}

    result = {}
    if elem.name == 'em':
        result['italics'] = True
    elif elem.name == 'strong':
        result['bold'] = True
    elif elem.name == 'span':
        try:
            # rudimentary parse into a dictionary
            styles = dict(
                s.replace(' ', '').split(':') 
                for s in elem.get('style', '').split(';')
                if s.strip()
            )
        except ValueError:
            raise ValueError('Invalid structure')
        if 'underline' not in styles.get('text-decoration', ''):
            raise ValueError('Invalid structure')
        result['decoration'] = 'underline'
    else:
        raise ValueError('Invalid structure')

    if len(elem) > 1:
        result['text'] = [parse_text(sub) for sub in elem]
    else:
        result.update(parse_text(next(iter(elem))))
    return result

You then parse your document:

for candidate in soup.select('ol,p'):
    try:
        result = parse(candidate)
    except ValueError:
        # invalid structure, ignore
        continue
    print(result)

Using pprint, this results in:

{'text': [{'text': 'The name is not mine it is for the people'},
          {'bold': True,
           'decoration': 'underline',
           'italics': True,
           'text': 'stephen'},
          {'italics': True,
           'text': [{'bold': True, 'text': ' how can'}, {'text': 'name '}]},
          {'bold': True, 'text': 'good'},
          {'text': ' '},
          {'italics': True,
           'text': [{'text': 'his name '},
                    {'decoration': 'underline', 'text': 'moneuet'},
                    {'text': 'please '}]},
          {'bold': True, 'decoration': 'underline', 'text': 'forever'},
          {'italics': True,
           'text': [{'text': 'tomorrow'}, {'bold': True, 'text': 'USA'}]}]}
{'text': [{'text': '2'}]}
{'text': [{'bold': True, 'text': 'moment'},
          {'italics': True, 'text': 'Africa'},
          {'text': ' '},
          {'italics': True, 'text': 'China'},
          {'text': ' '},
          {'decoration': 'underline', 'text': 'home'},
          {'text': ' '},
          {'italics': True, 'text': 'thomas'},
          {'text': ' '},
          {'bold': True, 'text': 'nothing'}]}
{'ol': [{'text': 'first item'},
        {'bold': True,
         'decoration': 'underline',
         'italics': True,
         'text': 'second item'}]}

Note that the text nodes are now nested; this lets you consistently re-create the same structure, with correct whitespace and nested text decorations.

The structure is also reasonably consistent; a 'text' key will either point at a single string, or a list of dictionaries. Such a list will never mix types. You could improve on this still; have 'text' only point to a string, and use a different key to signify nested data, such as contains or nested or similar, then use just one or the other. All that'd require is changing the 'text' keys in len(elem) > 1 case and in the parse() function.

来源：https://stackoverflow.com/questions/46483313/python-convert-html-into-json-using-soup

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