def download_file(url, dest=None, chunk_size=1024, replace="ask",
                  label="Downloading {dest_basename} ({size:.2f}MB)",
                  expected_extension=None):
    """Download a file from a given URL and display progress.

    :param dest: If the destination exists and is a directory, the filename
        will be guessed from the Content-Disposition header. If the destination
        is an existing file, the user will either be prompted to overwrite, or
        the file will be replaced (depending on the value of **replace**). If
        the destination does not exist, it will be used as the filename.
    :param int chunk_size: bytes read in at a time.
    :param replace: If `False`, an existing destination file will not be
        overwritten.
    :param label: a string which is formatted and displayed as the progress bar
        label. Variables provided include *dest_basename*, *dest*, and *size*.
    :param expected_extension: if set, the filename will be sanitized to ensure
        it has the given extension. The extension should not start with a dot
        (`.`).
    """
    dest = Path(dest or url.split("/")[-1])
    response = get(url, stream=True)
    if (dest.exists()
            and dest.is_dir()
            and "Content-Disposition" in response.headers):
        content_disposition = rfc6266.parse_requests_response(response)
        if expected_extension is not None:
            filename = content_disposition.filename_sanitized(
                expected_extension)
        filename = secure_filename(filename)
        dest = dest / filename
    if dest.exists() and not dest.is_dir():
        if (replace is False
                or replace == "ask"
                and not click.confirm("Replace {}?".format(dest))):
            return str(dest)
    size = int(response.headers.get("content-length", 0))
    label = label.format(dest=dest, dest_basename=dest.name,
                         size=size/1024.0/1024)
    with click.open_file(str(dest), "wb") as f:
        content_iter = response.iter_content(chunk_size=chunk_size)
        with click.progressbar(content_iter, length=size/1024,
                               label=label) as bar:
            for chunk in bar:
                if chunk:
                    f.write(chunk)
                    f.flush()
    return str(dest)
def _match_notequal_to(search_base, attribute, value, candidates):
        matches = list()
        match_using_regex = False

        if "*" in value:
            match_using_regex = True
            #regex = check_escape(value)
            regex = value.replace('*', '.*')
            regex = "^{0}$".format(regex)

        for entry in candidates:
            found = False
            dn = entry.get("dn")

            if not dn.endswith(search_base):
                continue

            values_from_directory = entry.get("attributes").get(attribute)
            if isinstance(values_from_directory, list):
                for item in values_from_directory:
                    if attribute == "objectGUID":
                        item = _convert_objectGUID(item)

                    if match_using_regex:
                        m = re.match(regex, str(item), re.I)
                        if m:
                            found = True
                    else:
                        if item == value:
                            found = True
                if found is False:
                    entry["type"] = "searchResEntry"
                    matches.append(entry)
            else:
                if attribute == "objectGUID":
                    values_from_directory = _convert_objectGUID(values_from_directory)

                if match_using_regex:
                    m = re.match(regex, str(values_from_directory), re.I)
                    if not m:
                        entry["type"] = "searchResEntry"
                        matches.append(entry)
                else:
                    if str(value) != str(values_from_directory):
                        entry["type"] = "searchResEntry"
                        matches.append(entry)

        return matches