from urllib.request import (build_opener, getproxies, install_opener,
        HTTPBasicAuthHandler, HTTPCookieProcessor, HTTPDigestAuthHandler,
        url2pathname, urlopen, Request)
from urllib.parse import (parse_qs, quote, unquote as uq, quote_plus, urldefrag,
        urlencode, urljoin, urlparse, urlunparse, urlsplit, urlunsplit)
from urllib.error import HTTPError, URLError


def unquote(x, encoding='utf-8', errors='replace'):
    binary = isinstance(x, bytes)
    if binary:
        x = x.decode(encoding, errors)
    ans = uq(x, encoding, errors)
    if binary:
        ans = ans.encode(encoding, errors)
    return ans


def unquote_plus(x, encoding='utf-8', errors='replace'):
    q, repl = (b'+', b' ') if isinstance(x, bytes) else ('+', ' ')
    x = x.replace(q, repl)
    return unquote(x, encoding=encoding, errors=errors)