在OS X上安装Python 3.3之后出现“命令未找到”错误

I was using Python 2.7 as it was installed on my Mac by default. I tried to update it to python 3.4. In the process I deleted 2.7 via the command line. I installed python 3.4 using an installer but I am still getting following error:I was using Python 2.7 as it was installed on m