通过 PIP 安装了 NPM，但获取"npm: command not found"

Question

我在OS X Yosemite 10.10.5上安装了Python 2.7。我想通过PIP安装NPM，并且命令显示成功，并且我在/Library/Python/2.7/site-packages/中有一个名为NPM的目录，但是对NPM进行任何操作都会产生"command not found"。

我是这样安装PIP和NPM的:

步骤1

sudo easy_install pip

给出如下输出:

Reading https://pypi.python.org/simple/pip/
Best match: pip 8.1.2
Downloading https://pypi.python.org/packages/e7/a8/7556133689add8d1a54c0b14aeff0acb03c64707ce100ecd53934da1aa13/pip-8.1.2.tar.gz#md5=87083c0b9867963b29f7aba3613e8f4a
Processing pip-8.1.2.tar.gz
Writing /tmp/easy_install-v4g_ZO/pip-8.1.2/setup.cfg
Running pip-8.1.2/setup.py -q bdist_egg --dist-dir /tmp/easy_install-v4g_ZO/pip-8.1.2/egg-dist-tmp-5Ku7Ds
warning: no previously-included files found matching '.coveragerc'
warning: no previously-included files found matching '.mailmap'
warning: no previously-included files found matching '.travis.yml'
warning: no previously-included files found matching '.landscape.yml'
warning: no previously-included files found matching 'pip/_vendor/Makefile'
warning: no previously-included files found matching 'tox.ini'
warning: no previously-included files found matching 'dev-requirements.txt'
warning: no previously-included files found matching 'appveyor.yml'
no previously-included directories found matching '.github'
no previously-included directories found matching '.travis'
no previously-included directories found matching 'docs/_build'
no previously-included directories found matching 'contrib'
no previously-included directories found matching 'tasks'
no previously-included directories found matching 'tests'
Adding pip 8.1.2 to easy-install.pth file
Installing pip script to /usr/local/bin
Installing pip2.7 script to /usr/local/bin
Installing pip2 script to /usr/local/bin
Installed /Library/Python/2.7/site-packages/pip-8.1.2-py2.7.egg
Processing dependencies for pip
Finished processing dependencies for pip

步骤2:

sudo -H pip install npm

给出如下输出:

Collecting npm
  Using cached npm-0.1.1.tar.gz
Requirement already satisfied (use --upgrade to upgrade): optional-django==0.1.0 in /Library/Python/2.7/site-packages (from npm)
Installing collected packages: npm
  Running setup.py install for npm ... done

步骤3:

npm -v

给出如下输出:

-bash: npm: command not found

下面是我的$PATH变量中的内容，但是为了便于阅读而分成了几行。值得注意的是，我从别人的机器上复制了这些，并且我的机器没有/usr/local/lib目录。

/usr/local/bin:
/usr/bin:
/bin:
/usr/sbin:
/sbin:
/opt/local/bin:
/opt/local/sbin:
/usr/local/lib/python2.7:
/usr/local/lib/python2.7/site-packages:
/usr/local/lib/node_modules:
/usr/bin/python2.7:
/Library/Python/2.7/site-packages/npm

我对Linux并不陌生，但我是OS X的新手，所以这可能是我忽视的一些明显的东西。

Answer 1

您在第2步中执行的操作

sudo -H pip install npm 

没有在您的计算机上安装NPM。这个命令只要求安装一个名为npm的python包。

软件包描述可用https://pypi.python.org/pypi/npm/0.1.1:)

正如developer github存储库中描述的那样，这个python包是为"python绑定和npm的utils"设计的。

这个包是unmaintenance .

如果你想安装NPM，你应该检查节点js的网站

Answer 2

如果你说的是npm (Node Package Manager)，你必须先安装Nodejs。NPM是Node自带的。

要通过Mac执行此操作，请使用http://brew.sh或https://www.macports.org。

brew update
brew install node

Answer 3

对于Python-3，要安装npm(1)命令(而不是npm bindings)，如下所示:

设${HOME}/pyvenv.d/为Python-3虚拟环境所在位置。然后:

user$ source ${HOME}/pyvenv.d/activate
(pyvenv.d) user$ pip install nodeenv  # Install a tool that can install a pre-build npm(1) version.
(pyvenv.d) user$ nodeenv -p           # Run tool to install npm(1) in current Python venv.
(pyvenv.d) user$ which npm
/home/user/pyvenv.d/bin/npm
(pyvenv.d) user$ npm --version
7.3.0
(pyvenv.d) user$ which node
/home/user/pyvenv.d/bin/node
(pyvenv.d) user$ node --version
v15.5.0

只要Python-3虚拟环境保持激活状态，现在就可以像往常一样发出npm(1)命令。例如:

(pyvenv.d) user$ npm install [-g] configurable-http-proxy