Windows上的Python STDOUT

Question

Python on Windows does not use normal STDOUT, so what is going on here?

python --version
Python 2.7.15

shows a version! But I can't capture it!

python --version > temp.txt
Python 2.7.15
type temp.txt

NOTHING!

The issue is, I need to do logic depending on the Python version (from JavaScript) and it's been pretty hopeless so far.

Answer 1

在将stdout重定向到文件的同时，尝试将stderr重定向到stdout：

python --version 1>temp.txt 2>&1

Answer 2

You can use a Python command to print the version info to stdout:

> python -c "import sys;print(sys.version)" > temp.txt

After this command, temp.txt will contain the version information.

> type temp.txt
2.7.15 |Anaconda, Inc.| (default, May  1 2018, 18:37:09) [MSC v.1500 64 bit (AMD64)]

If you wanted to get fancier, you could use sys.version_info to extract only specific part of the version, like the major number as explained in https://stackoverflow.com/a/9079062/7517724 . Using the following line will store only the major version number in temp.txt :

> python -c "import sys;print(sys.version_info[0])" > temp.txt
> type temp.txt
2