#!/usr/bin/env python3

# -*- coding: utf-8 -*-

import math

def my_abs(x):

? ? if not isinstance(x, (int, float)):

? ? ? ? raise TypeError('bad operand type')

? ? if x >= 0:

? ? ? ? return x

? ? else:

? ? ? ? return -x

def move(x, y, step, angle=0):

? ? nx = x + step * math.cos(angle)

? ? ny = y - step * math.sin(angle)

? ? return nx, ny

n = my_abs(-20)

print(n)

x, y = move(100, 100, 60, math.pi / 6)

print(x, y)

# TypeError: bad operand type:

my_abs('123')