helpers.py 文件源码

def lowercase_attr_names(tag):
    """Lower-case all attribute names of the provided BeautifulSoup tag.
    Note: this mutates the tag's attribute names and does not return a new
    tag.

    :param Tag: BeautifulSoup tag

    """
    # Use list comprehension instead of dict comprehension for 2.6 support
    tag.attrs = dict([
        (key.lower(), value)
        for key, value in iteritems(tag.attrs)
    ])