<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def add_cache_bypass(url):
 """ Adds the current time to the querystring of the URL to force a cache reload. Used for when a form post redirects back to a page that should display updated content, such as new comments or ratings. """

    if not cache_installed():
        return url
    hash_str = ""
    if "#" in url:
        url, hash_str = url.split("#", 1)
        hash_str = "#" + hash_str
    url += "?" if "?" not in url else "&"
    return url + "t=" + str(time()).replace(".", "") + hash_str