python version check command fail

[hotleave]

Start to install - step 3

python -v

where -v means verbose, but -V means version. Here is part of python --help:

-v     : verbose (trace import statements); also PYTHONVERBOSE=x
-V     : print the Python version number and exit (also --version)

[Gabirel]

It's my mistake. Fix later.
You should use -V instead