Package pygeodesy :: Module constants

Module constants

Single-instance float and int constants across pygeodesy modules and related functions pygeodesy.float_, pygeodesy.isclose, pygeodesy.isfinite, pygeodesy.isinf, pygeodesy.isint0, pygeodesy.isnan, pygeodesy.isnear0, pygeodesy.isnear1, pygeodesy.isnear90, pygeodesy.isneg0, pygeodesy.isninf, pygeodesy.isnon0 and pygeodesy.remainder.

Version: 24.04.23

Functions

bool

isinf(x)
Check if float x is infinite (positive or negative).

bool

isnan(x)
Check if float x is not a number (NaN).

float_(*fs, **sets)
Get scalars as float or intern'ed float.

float0_(*xs)
Yield xs as a non-NEG0 float.

isclose(a, b, rel_tol=1e-12, abs_tol=4.930380657631324e-32)
Like math.isclose, but with defaults such that isclose(0, EPS0) is True by default.

isfinite(obj)
Check a finite scalar or complex value.

isint0(obj, both=False)
Check for INT0 or int(0) value.

isnear0(x, eps0=4.930380657631324e-32)
Is x near zero within a tolerance?

isnear1(x, eps1=4.930380657631324e-32)
Is x near one within a tolerance?

isnear90(x, eps90=4.930380657631324e-32)
Is x near 90 within a tolerance?

isneg0(x)
Check for NEG0, negative 0.0.

isninf(x)
Check for NINF, negative INF.

isnon0(x, eps0=4.930380657631324e-32)
Is x non-zero with a tolerance?

remainder(x, y)
Mimick Python 3.7+ math.remainder.

Variables
	__all__ = `_ALL_LAZY.constants`
	DIG = `15`
	EPS = `2.220446049250313e-16`
	MANT_DIG = `53`
	MAX = `1.7976931348623157e+308`
	MAX_EXP = `1024`
	MIN = `2.2250738585072014e-308`
	MIN_EXP = `-1021`
	EPS0 = `4.930380657631324e-32`
	EPS02 = `2.4308653429145085e-63`
	EPS_2 = `1.1102230246251565e-16`
	EPS1 = `0.9999999999999998`
	EPS2 = `4.440892098500626e-16`
	EPS4 = `8.881784197001252e-16`
	INF = `inf`
	INT0 = `0`
	NAN = `nan`
	NEG0 = `-0.0`
	NINF = `-inf`
	PI = `3.141592653589793`
	PI2 = `6.283185307179586`
	PI_2 = `1.5707963267948966`
	PI3 = `9.42477796076938`
	PI3_2 = `4.71238898038469`
	PI_3 = `1.0471975511965976`
	PI4 = `12.566370614359172`
	PI_4 = `0.7853981633974483`
	R_MA = `6378137.0`
	R_MB = `6356752.3`
	R_M = `6371008.771415`
	R_KM = `6371.0087714149995`
	R_NM = `3440.06953100162`
	R_SM = `3958.7613160486508`
	R_FM = `6371000.0`
	R_GM = `6371230.0`
	R_QM = `6372797.560856`
	R_VM = `6366707.0194937`

Function Details

float_ (*fs, **sets)

Get scalars as float or intern'ed float.

Arguments:

fs - One more values (scalar), all positional.
sets - Use sets=True to intern each fs, otherwise don't intern.

Returns:

A single float if only one fs is given, otherwise a tuple of floats.

Raises:

TypeError - Some fs is not scalar.

isfinite (obj)

Check a finite scalar or complex value.

Arguments:

obj - Value (scalar or complex).

Returns:

False if obj is INF, NINF or NAN, True otherwise.

Raises:

TypeError - Non-scalar and non-complex obj.

isint0 (obj, both=False)

Check for INT0 or int(0) value.

Arguments:

obj - The object (any type).
both - If true, also check float(0) (bool).

Returns:

True if obj is INT0, int(0) or float(0), False otherwise.

isnear0 (x, eps0=4.930380657631324e-32)

Is x near zero within a tolerance?

Arguments:

x - Value (scalar).
eps0 - Near-zero tolerance (EPS0).

Returns:

True if abs(x) < eps0, False otherwise.

See Also: Function isnon0.

isnear1 (x, eps1=4.930380657631324e-32)

Is x near one within a tolerance?

Arguments:

x - Value (scalar).
eps1 - Near-one tolerance (EPS0).

Returns:

isnear0(x - 1, eps0=eps1).

See Also: Function isnear0.

isnear90 (x, eps90=4.930380657631324e-32)

Is x near 90 within a tolerance?

Arguments:

x - Value (scalar).
eps90 - Near-90 tolerance (EPS0).

Returns:

isnear0(x - 90, eps0=eps90).

See Also: Function isnear0.

isneg0 (x)

Check for NEG0, negative 0.0.

Arguments:

x - Value (scalar).

Returns:

True if x is NEG0 or -0.0, False otherwise.

isninf (x)

Check for NINF, negative INF.

Arguments:

x - Value (scalar).

Returns:

True if x is NINF or -inf, False otherwise.

isnon0 (x, eps0=4.930380657631324e-32)

Is x non-zero with a tolerance?

Arguments:

x - Value (scalar).
eps0 - Non-zero tolerance (EPS0).

Returns:

True if abs(x) > eps0, False otherwise.

See Also: Function isnear0.