Function _build_xpath_expr

pandas/io/html.py:675–695

Build an xpath expression to simulate bs4's ability to pass in kwargs to search for attributes when using the lxml parser. Parameters ---------- attrs : dict A dict of HTML attributes. These are NOT checked for validity. Returns ------- expr : unicode

(attrs)

def _build_xpath_expr(attrs) -> str:
    """
    Build an xpath expression to simulate bs4's ability to pass in kwargs to
    search for attributes when using the lxml parser.

    Parameters
    ----------
    attrs : dict
        A dict of HTML attributes. These are NOT checked for validity.

    Returns
    -------
    expr : unicode
        An XPath expression that checks for the given HTML attributes.
    """
    # give class attribute as class_ because class is a python keyword
    if "class_" in attrs:
        attrs["class"] = attrs.pop("class_")

    s = " and ".join([f"@{k}={v!r}" for k, v in attrs.items()])
    return f"[{s}]"


_re_namespace = {"re": "http://exslt.org/regular-expressions"}