def select_feature_vector(feature_freq_dict, selected_feature):
    """Given a list of selected most common keyword_list, Returns a dictionary of frequent word_list. Note that if a selected keyword is not present, 0 is returened as the key value.
        feature_freq_dict -- a dictionary of word frequency
        selected_feature -- a list of word_list to check against
    """
    word_freq_dict_selected = {}
    for key in selected_feature:
        value = 0
        if feature_freq_dict.get(key) is not None:
            value = feature_freq_dict.get(key)
        word_freq_dict_selected[key] = value
    return word_freq_dict_selected