shell里执行 os.popen('pip show pyqmix').read() 的结果与 cmd 中执行 pip show pyqmix 的结果不符，只能部分输出
尝试使用过subprocess.Popen替代os.popen，也只能部分输出
py原装shell输出：
'Name: pyqmix\nVersion: 2021.1.2\n
Summary: A wrapper for the Cetoni Qmix SDK.\n
Home-page: https://pyqmix.readthedocs.io/\n'
cmd输出：
Name: pyqmix
Version: 2021.1.2
Summary: A wrapper for the Cetoni Qmix SDK.
Home-page: https://pyqmix.readthedocs.io/
Author: Lorenzo Alfine <lorenzo.alfine@gmail.com>, Richard Höchenberger <richard.hoechenberger@gmail.com>, Camilla Arndal Andersen <camilla@arndalandersen.dk>
Author-email: richard.hoechenberger@gmail.com
License: GPL v3
Location: e:\python 3.8.2\lib\site-packages
Requires: appdirs, cffi, pywin32, ruamel.yaml
Required-by: PsychoPy
