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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_submissions_for_student_item(request, course_id, student_id, item_id):
 """Retrieve all submissions associated with the given student item. Developer utility for accessing all the submissions associated with a student item. The student item is specified by the unique combination of course, student, and item. Args: request (dict):
 The request. course_id (str):
 The course id for this student item. student_id (str):
 The student id for this student item. item_id (str):
 The item id for this student item. Returns: HttpResponse: The response object for this request. Renders a simple development page with all the submissions related to the specified student item. """

    student_item_dict = dict(
        course_id=course_id,
        student_id=student_id,
        item_id=item_id,
    )
    context = dict(**student_item_dict)
    try:
        submissions = get_submissions(student_item_dict)
        context["submissions"] = submissions
    except SubmissionRequestError:
        context["error"] = "The specified student item was not found."

    return render_to_response('submissions.html', context)