学python遇到的错误

catNames=[]while True:    print ('enter the name of cat '+str(len(catNames)+1)+ '(Or enter nothing to stop.):')    name=input()    if name=='':        break    catNames=catNames+[name]print ('The cat names are:')for name in catNames:    print (''+name)这段代码运行的时候会出现enter the name of cat 1(Or enter nothing to stop.):TomTraceback (most recent call last):  File "F:/PyCharmProject/Helloworld.py", line 4, in <module>    name=input()  File "<string>", line 1, in <module>NameError: name 'Tom' is not defined这种错误，是因为name=input()这句话，input()只能用于输入数字，改成raw_input()就可以了。