
    Create a system that identifies subjects where a student has demonstrated sufficient mastery by filtering their academic performance record to show only the subjects where they've met or exceeded the required competency threshold. The function should accept a student's performance record (containing subject-score pairs) and a minimum mastery threshold, returning only the subjects where the student has achieved scores at or above this threshold.
    

    
def dict_filter(dict, n):
    """
    Create a system that identifies subjects where a student has demonstrated sufficient mastery by filtering their academic performance record to show only the subjects where they've met or exceeded the required competency threshold. The function should accept a student's performance record (containing subject-score pairs) and a minimum mastery threshold, returning only the subjects where the student has achieved scores at or above this threshold.
    

    """
def dict_filter(dict, n):
    """
    Create a system that identifies subjects where a student has demonstrated sufficient mastery by filtering their academic performance record to show only the subjects where they've met or exceeded the required competency threshold. The function should accept a student's performance record (containing subject-score pairs) and a minimum mastery threshold, returning only the subjects where the student has achieved scores at or above this threshold.
    

    """
    result = {key: value for (key, value) in dict.items() if value >= n}
    return result