def wd(): w=input('请输入一个摄氏温度或者一个华氏温度,如,34c/C or 34f/F:') if w[-1] in ['c','C']: w=float(w[:-1]) hs=1.8*w+32 print('华氏温度:{:.2f}F'.format(hs)) elif w[-1] in ['f',' F']: w=float(w[:-1]) ss=(w-32)/1.8 print ('摄氏温度:{:.2f}C'.format(ss)) wd()