判断三角形类型

import argparse


def parser():
    ap = argparse.ArgumentParser()
    ap.add_argument("-a", "--a", required=True, help="边a的边长")
    ap.add_argument("-b", "--b", required=True, help="边b的边长")
    ap.add_argument("-c", "--c", required=True, help="边c的边长")
    return ap.parse_args()


def main():
    opt = parser()
    a = float(opt.a)
    b = float(opt.b)
    c = float(opt.c)
    # a=input("边长a:")
    # b = inut("边长b：")
    if a+b>c and a+c>b and b+c>a:
        print ("a=%s, b=%s, c=%s 可以构成三角形" % (a, b, c))
        if a == b == c:
            print ("a=%s, b=%s, c=%s 构成等边三角形" % (a, b, c))
        elif a == b or b == c or a == c:
            print ("a=%s, b=%s, c=%s 构成等腰三角形" % (a, b, c))
            if max([a, b, c]) ** 2 == min([a, b, c]) ** 2 * 2:
                print ("a=%s, b=%s, c=%s 构成直角三角形" % (a, b, c))
            elif max([a, b, c]) ** 2 > min([a, b, c]) ** 2 * 2:
                print ("a=%s, b=%s, c=%s 构成钝角三角形" % (a, b, c))
            elif max([a, b, c]) ** 2 < min([a, b, c]) ** 2 * 2:
                print ("a=%s, b=%s, c=%s 构成锐角三角形" % (a, b, c))
        else:
            max_v = max([a, b, c])
            min_v = min([a, b, c])
            mid_v = list(set([a,b,c])-set([max(a,b,c),min([a,b,c])]))[0]
            if max_v**2 == min_v**2 + mid_v**2:
                print ("a=%s, b=%s, c=%s 构成直角三角形" % (a, b, c))
            elif max_v**2 > min_v**2 + mid_v**2:
                print ("a=%s, b=%s, c=%s 构成钝角三角形" % (a, b, c))
            else:
                print ("a=%s, b=%s, c=%s 构成锐角三角形" % (a, b, c))
    else:
        print ("a=%s, b=%s, c=%s 不可以构成三角形" % (a, b, c))
    return

main()