How to install npm package from python script?

Question

How to install npm package from python script?

When I use subprocess.Popen(["node", "app.js"]) , it is OK .
When I use subprocess.Popen(["npm", "install", "open"]) , it throws an error .

Sorry, Google and DuckDuckGo are not my friends today (

The main problem is automatic local installation requires packages for my small utility, because global packages do not work on Windows.

PS. I need to ask this question because I'm trying to develop a plugin for Sublime Text 2.

This is the error in the Sublime python console :

 Reloading plugin …\stsync.py Traceback (most recent call last): File ".\sublime_plugin.py", line 103, in create_application_commands cmds.append(class_()) File ".\stsync.py", line 16, in __init__ File ".\subprocess.py", line 633, in __init__ File ".\subprocess.py", line 842, in _execute_child WindowsError: [Error 2] 

line 16: subprocess.Popen(["node", "npm", "install", "open"])

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If I change 16 lines to the .Popen subprocess (["node", "npm", "install", "open"]) then the python script will successfully call the nodejs terminal, but then the nodejs terminal will fail:
cannot find npm module

Answer 1

set shell argument to True

 subprocess.Popen(["node", "npm", "install", "open"], shell=True)