查看下python版本

macosdeMacBook:Versions macos$ cd /System/Library/Frameworks/Python.framework/Versions/

macosdeMacBook:Versions macos$ ls

2.32.52.62.7Current

macosdeMacBook:Versions macos$ python -version

Unknown option: -e

usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...

Try `python -h' for more information.

macosdeMacBook:Versions macos$ python --version

Python 2.7.16

macosdeMacBook:Versions macos$ python -V

Python 2.7.16

macosdeMacBook:Versions macos$

==========================================================================

下载：https://www.python.org/downloads/mac-osx/

==========================================================================

macosdeMacBook:Versions macos$ python3

Python 3.9.1 (v3.9.1:1e5d33e9b9, Dec  7 2020, 12:10:52)

[Clang 6.0 (clang-600.0.57)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>> exit()

macosdeMacBook:Versions macos$ python -V

Python 2.7.16

macosdeMacBook:Versions macos$

==========================================================================

macosdeMacBook:~ macos$ pip3 install numpy

Collecting numpy

Downloading numpy-1.19.4-cp39-cp39-macosx_10_9_x86_64.whl (15.4 MB)

|████████████████████████████████| 15.4 MB 19 kB/s

Installing collected packages: numpy

Successfully installed numpy-1.19.4

WARNING: You are using pip version 20.2.3; however, version 20.3.3 is available.

You should consider upgrading via the '/Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9 -m pip install --upgrade pip' command.

macosdeMacBook:~ macos$