is_nan() Return

add(x, y) Return the sum of x and y.

class decimal.DecimalException Base class for other signals and a subclass of

math.gcd(a, b) Return the greatest common divisor of the integers a and b. If either a or b

from_decimal(dec) This class method constructs a Fraction representing the exact value of dec, which must

cmath.tan(x) Return the tangent of x.

abs(x) Returns the absolute value of x.

cmath.acos(x) Return the arc cosine of x. There are two branch cuts: One extends right from 1 along the real axis to

math.log(x[, base]) With one argument, return the natural logarithm of x (to base e). With

class numbers.Integral Subtypes Rational and adds a conversion to