python之操作读写文件

def Read_Txt():
    try:
        File=open(r"D:\pycharm workplace\test.txt","rb")# rb 以unicode的编码读取文件，
        print File.read().decode("gbk")                     #Unicode可以用decode转换为自己想要的编码
    finally:
        File.close()
def Write_Txt():
     with open(r"D:\pycharm workplace\test.txt","a") as File2:   # with  。。。。。open  as file 的打开文件方式 等同于 try 。。。。finally  file.close "a"追加的方式写入文件
        File2.write("nihao你好")

if __name__=="__main__":
    Read_Txt()
    Write_Txt()