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65d4da6 May 15, 2015
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executable file 27 lines (20 sloc) 466 Bytes
#!/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')