返回值范围0-360
import numpy as np
def angle(x1, y1, x2, y2):
if x1 == x2:
return 90
if y1 == y2:
return 180
k = -(y2 - y1) / (x2 - x1)
# 求反正切，再将得到的弧度转换为度
result = np.arctan(k) * 57.29577
# 234象限
if x1 > x2 and y1 > y2:
result += 180
elif x1 > x2 and y1 < y2:
result += 180
elif x1 < x2 and y1 < y2:
result += 360
print("直线倾斜角度为：" + str(result) + "度")
return result
if __name__ == '__main__':
x1, y1 = (306, 319)
x2, y2 = (205, 331)
angle(x1, y1, x2, y2)
