def replace_dict_values(d, replace_keys):
    """Returns a dictionnary with replaced values
    replace_keys is a dictionary
    replace_keys = {'key': 'value_to_display'}"""
    d_hidden = d.copy()
    for key, replace_value in replace_keys.items():
        if key in d_hidden.keys():
            d_hidden[key] = replace_value
    return d_hidden