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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_request(request_url, request_headers=dict()):
 """Execute http get request on given request_url with optional headers """

    request = Request(request_url)
    for key, val in request_headers.items():
        request.add_header(key, val)

    try:
        response = urlopen(request, timeout=_REQUEST_TIMEOUT)
        response_content = response.read()
    except (HTTPError, URLError, socket.timeout):
        response_content = None

    return response_content