random.expovariate(lambd) Exponential distribution. lambd is 1.0 divided by the desired mean. It should be nonzero

class numbers.Real To Complex, Real adds the operations that work on real numbers.

math.factorial(x) Return x factorial. Raises

is_finite() Return

is_signed(x) Returns True if x is negative; otherwise returns False.

random.seed(a=None, version=2) Initialize the random number generator. If a is omitted

class decimal.Context(prec=None, rounding=None, Emin=None, Emax=None, capitals=None, clamp=None, flags=None, traps=None) Creates

class fractions.Fraction(numerator=0, denominator=1) class fractions.Fraction(other_fraction) class fractions

math.atan(x) Return the arc tangent of x, in radians.

math.sin(x) Return the sine of x radians.