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+import pytest%0Afrom ogusa import utils%0Aimport numpy as np%0A%0A%0Adef test_rate_conversion():%0A    '''%0A    test of utils.rate_conversion%0A    '''%0A    expected_rate = 0.3%0A    annual_rate = 0.3%0A    start_age = 20%0A    end_age = 80%0A    s = 60%0A    test_rate = utils.rate_conversion(annual_rate, start_age, end_age, s)%0A    assert(np.allclose(expected_rate, test_rate))%0A

test of utils.py