class random.SystemRandom([seed]) Class that uses the

to_eng_string(x) Convert to a string, using engineering notation if an exponent is needed. Engineering

math.expm1(x) Return e**x - 1. For small floats x, the subtraction in exp(x) - 1 can result

math.isinf(x) Return True if x is a positive or negative infinity, and False otherwise.

random.setstate(state) state should have been obtained from a previous call to getstate(), and setstate()

statistics.pvariance(data, mu=None) Return the population variance of data, a non-empty iterable of real-valued numbers

clear_flags() Resets all of the flags to 0.

statistics.variance(data, xbar=None) Return the sample variance of data, an iterable of at least two real-valued numbers

math.frexp(x) Return the mantissa and exponent of x as the pair (m, e). m is a float and e

math.degrees(x) Convert angle x from radians to degrees.