b=open('b.txt','w')a=open('a.txt')b.write(a.read())b.close()

（1）将一个a.txt文件复制为b.txt文件

a=open('a.txt')b=open('b.txt')c=open('c.txt','w')c.write(a.read())c.write(b.read())a.close()b.close()c.close()

（2）强a.txt和b.txt的内容合并取来再存入c.txt