statistics.stdev(data, xbar=None) Return the sample standard deviation (the square root of the sample variance). See variance()

imag Abstract. Retrieves the imaginary component of this number.

to_integral_value(rounding=None, context=None) Round to the nearest integer without signaling Inexact or Rounded

__ceil__() Returns the least

log10(context=None) Return the base ten logarithm of the operand. The result is correctly rounded using the ROUND_HALF_EVEN

next_minus(x) Returns the largest representable number smaller than x.

cmath.e The mathematical constant e, as a float.

min_mag(other, context=None) Similar to the min() method, but the comparison is done using the absolute values

math.fabs(x) Return the absolute value of x.

math.log10(x) Return the base-10 logarithm of x. This is usually more accurate than log(x, 10).