to_integral_exact(rounding=None, context=None) Round to the nearest integer, signaling Inexact or Rounded

ln(x) Returns the natural (base e) logarithm of x.

logical_xor(other, context=None) logical_xor() is a logical operation which takes two logical operands

copy_sign(other, context=None) Return a copy of the first operand with the sign set to be the same as the sign of the second

class decimal.Subnormal Exponent was lower than Emin prior to rounding. Occurs

decimal.getcontext() Return the current context for the active thread.

random.normalvariate(mu, sigma) Normal distribution. mu is the mean, and sigma is the standard deviation.

class decimal.ExtendedContext This is a standard context defined by the General Decimal Arithmetic Specification. Precision

rotate(other, context=None) Return the result of rotating the digits of the first operand by an amount specified by the second

is_qnan(x) Returns True if x is a quiet NaN; otherwise returns False.