all Python 3cmathfunction

cmath.polar()

polar coordinates

Converts a complex number to polar coordinates: returns a (modulus, angle) tuple of two floats.

Syntax

r, phi = cmath.polar(z)

It returns plain floats, not complex: polar(z) is (abs(z), phase(z)). The angle is in radians and in the range (-π, π], so a round trip through rect may give a different angle back: rect(1, 3π/2) turns into an angle of about -π/2. Use math.degrees for degrees.

Examples

import cmath
print(cmath.polar(1 + 1j))  # → (1.4142135623730951, 0.7853981633974483)
print(cmath.polar(-2))  # → (2.0, 3.141592653589793)

import cmath
import math
r, phi = cmath.polar(cmath.rect(1, 3 * math.pi / 2))
print(round(math.degrees(phi)))  # → -90

cmath.polar()

Syntax

Examples

See also