Set up shortcut for python compiler -- .bashrc

It's sometimes annoying when you use python compiler.  Especially you went to some spicily complier.

I used to use python3.4 for my code. but it's not quite fast to type the whole name.

My default python version is Python 2.7.10

[check]

                                                                       
$ python --version                                     
                                                                         

ps: python2.7 是官方認可的最後版本，也是version 2中最終版本。基本上mac系統中都已經內建python系統。

Although use aliases for changing is helpful, once you close terminal or environment , the aliases before you set up will be gone.

More information about 'alias" please check 指令別名設定 -- BASH

So add alias in file-- .bashrc is a key to change environment that you don't need to set up every time at first time opening terminal.

[1. First ]

Find the location and See what python binary executables you have.

                                                                 
$ ls /usr/local/bin/python*                
                                                                  

choose and copy the the complier which you want

[2. Second]

open (or create) the .bashrc file

here i already have this file, so just need to open it.

                                                                                           
$ vi ~/.bashrc                                                                  
                                                                                            

Add new alias to change your default python executable:

                                                                                            
alias = py3='python3.4'                                                
                                                                                            

leave the file and source the file:

                                                                                            

$ . ~/.bashrc                                                                    

                                                                                            

check the version:

Reference: How to change from default to alternative Python version on Debian Linux

波比謬思

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然而，這個人人稱羨的減肥“成功“對他來說卻是一個噩耗。
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對他來說卻一點也不成功。

人生僅不是如此，


當你的減肥不是出於自願時，何不大步地享受輕盈的跳躍。
當你面對突如期來的失敗時，何不當下享受一道美味的一餐，拋開減肥時無法安心咀嚼障礙呢。

指令別名設定 -- BASH

參考文獻：鳥哥 10.3.1  alias, unalias

I learn Python programming recently. There are many complier i can use for.

I used to use python3.4 but i found this way is too annoying. So, to be speed up coding, i need to typing less words.

Usually, i compile my code like this way:

>> python3.4 xxx.py
--------------------------------------------------------------------

now simplified complier "python3.4" as "Py3":

>>$ alias Py3='python3.4'

--------------------------------------------------------------------

if change back:

>> $ unalias Py3

---------------------------------------------------------------------

check all the simplification

>> alias

===========[學習紀錄]================

ps: 若要改變路徑，參考path 相關文章