Safely escape a URL that has a hash fragment.

fragment_safe_url_escape.py

    def escape(self, url):
        # We don't want to escape the hash, if it exists.
        if '#' in url:
            url, fragment = url.split('#', 1)
        else:
            fragment = ''

        # Escape the body of the URL and fragment
        def _escape(url):
            return '/'.join(
                urllib.quote_plus(
                    self.spaces_cp.sub('+', u).replace(':', '.')) 
                for u in url.split('/')
                )

        url = _escape(url)
        if fragment:
            fragment = _escape(fragment)

        # Re-join the fragment, if it exists.
        if fragment:
            url = '%s#%s' % (url, fragment)
            
        return url