How do PyQuery to remove HTML coments?

[mywaiting]

We know that PyQuery is an implementation that imitates jQuery writen in Javascript and I am well aware that there is no direct implementation to clear HTML comments in jQuery. Because using css selector can NOT(imposible) find html commens and delete it

However, PyQuery is built using lxml as the underlying layer, which has comprehensive xpath capabilities to capture and process all XML documents

You can extend PyQuery like this

class MyPyQuery(pyquery.PyQuery):
    def xpath(self, xpath):
        """Use the xpath compatible find method, as css selector cannot find html commends and delete it
        """
        # Note: This is the only difference from the native pyquery. find() method
        # xpath = self._css_to_xpath(selector)
        results = [child.xpath(xpath, namespaces=self.namespaces)
                   for tag in self
                   for child in tag.getchildren()]
        # Flatten the results
        elements = []
        for r in results:
            elements.extend(r)
        return self._copy(elements, parent=self)

Usage like this, you can remove all html comments like this

d = MyPyQuery("<p>hello</p><!-- comments() here --><p>world</p>")
d.xpath("//comment()").remove()
print(d.html())
# <p>hello</p><p>world</p>

Although PyQuery is designed to fully simulate jQUery, it also uses the cssselect package to convert xpath to cssselector, But I think it makes sense to keep the entry point for manipulating xpath in PyQuery

I am just providing an example for everyone's reference. If necessary, I may provide a PR to facilitate the entire package to consider both implementing xpath selector and CSS selector simultaneously

Thx

[mywaiting]

If you need to manually add an implementation for xpath lookup in a project, especially if PyQuery has already been initialized, you can use PyQuery.Fn to temporarily extend its implementation

def xpath(xpath):
    """Use the xpath compatible find method, as css selector cannot find html commends and delete it
   # Note: Please pay special attention to the use of **this** keyword
    """
    # Note: This is the only difference from the native pyquery. find() method
    # xpath = self._css_to_xpath(selector)
    results = [child.xpath(xpath, namespaces=this.namespaces)
                for tag in this
                for child in tag.getchildren()]
    # Flatten the results
    elements = []
    for r in results:
        elements.extend(r)
    return this._copy(elements, parent=this)


d = PyQuery("<p>hello</p><!-- comments() here --><p>world</p>")

# insert xpath function here!!!
d.fn.xpath = xpath

d.xpath("//comment()").remove()
print(d.html())
# <p>hello</p><p>world</p>

Equivalent to temporarily extending PyQuery to use a certain function/feature without modifying the original PyQuery code implementation