Command "python --verson" using "awk" extract version number

Question

I know following command can show version of python

$ python --version

Result:

Python 3.7.4

I want to extract 3.7.4 only.

So, I attempt to following command using awk

$ python --version | awk '{print $2}'

But result still same as command python --version :

Python 3.7.4

I also try to specify delimiter space:

$ python --version | awk -F' ' '{print $2}'

Result still same as python --version :

Python 3.7.4

How do I do?

Thanks @hek2mgl 's reply. But I've read link which you provide, but I don't understand those link relationship with my question. — curlywei, Sep 22 '19 at 08:40
did this command work for you? echo `python --version` | awk '{print $2}' what is your bash version? bash --version — MMParvin, Sep 22 '19 at 08:40

score 3 · Answer 1 · answered Sep 22 '19 at 08:57

3

 python -c 'import platform; print(platform.python_version())'

Output (e.g.):

2.7.1

answered Sep 22 '19 at 08:57

Cyrus

score 2 · Accepted Answer · answered Sep 22 '19 at 08:41

2

the reason is that python prints the output on stderr rather than stdout. Solution e.g.:

python --version 2>&1 | awk '{print $2}'

answered Sep 22 '19 at 08:41

user829755

2 Answers2