(轉)Linux下運行python

原文： http://blog.csdn.net/jackywgw/article/details/48847187

在linux命令行下運行python，可以直接輸出hello world

jackywgw@jackywgw-A8F:~/python_learning$ python
Python 3.3.6 (default, Apr 17 2015, 00:20:01)
[GCC 4.9.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> print('hello world')
hello world
>>>

如果將print ('hello world')寫入first_helloworld.py中，通過python first_helloworld.py可以輸出hello world.

如果想直接運行./first_helloworld.py，則先要chmod u+x first_helloworld,然后還要在first_helloworld.py最前面加入#!/usr/bin/python3

#!/usr/bin/python3
print('hello world')

#!/usr/bin/python3 這個為python的可執行路徑，可以通過which python3/ which python來獲取。

jackywgw@jackywgw-A8F:~/python_learning$ which python3
/usr/bin/python3
jackywgw@jackywgw-A8F:~/python_learning$ which python
/usr/bin/python
jackywgw@jackywgw-A8F:~/python_learning$

這樣就可以直接運行./first_helloworld.py輸出hello world了。