<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set_cookie(response, name, value, expiry_seconds=None, secure=False):
 """ Set cookie wrapper that allows number of seconds to be given as the expiry time, and ensures values are correctly encoded. """

    if expiry_seconds is None:
        expiry_seconds = 90 * 24 * 60 * 60  # Default to 90 days.
    expires = datetime.strftime(datetime.utcnow() +
                                timedelta(seconds=expiry_seconds),
                                "%a, %d-%b-%Y %H:%M:%S GMT")
    # Django doesn't seem to support unicode cookie keys correctly on
    # Python 2. Work around by encoding it. See
    # https://code.djangoproject.com/ticket/19802
    try:
        response.set_cookie(name, value, expires=expires, secure=secure)
    except (KeyError, TypeError):
        response.set_cookie(name.encode('utf-8'), value, expires=expires,
                            secure=secure)