Develop Reference

Using brain.js in nodejs server but getting error gpu.js not present

I'm using brain.js library for creating Nural network.
Package installed perfectly, but when I ran the server then I get this error.
Cannot find module gpu.js
Then I installed "npm i gpu.js"
Then I got this error - This below error says that install visual studio 2022 latest version and run this in that. I did but didnt worked.
code part
npm WARN deprecated uuid#3.4.0: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details.
npm WARN deprecated request#2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm ERR! code 1
npm ERR! path C:\Users\priya\JSAIML\ytHelper\node_modules\gl
npm ERR! command failed
npm ERR! command C:\Windows\system32\cmd.exe /d /s /c prebuild-install || node-gyp rebuild
npm ERR! gyp info it worked if it ends with ok
npm ERR! gyp info using node-gyp#7.1.2
npm ERR! gyp info using node#18.8.0 | win32 | x64
npm ERR! gyp info find Python using Python version 3.10.3 found at "C:\Users\priya\AppData\Local\Programs\Python\Python310\python.exe"
npm ERR! gyp ERR! find VS
npm ERR! gyp ERR! find VS msvs_version not set from command line or npm config
npm ERR! gyp ERR! find VS VCINSTALLDIR not set, not running in VS Command Prompt
npm ERR! gyp ERR! find VS could not use PowerShell to find Visual Studio 2017 or newer, try re-running with '--loglevel silly' for more details
npm ERR! gyp ERR! find VS looking for Visual Studio 2015
npm ERR! gyp ERR! find VS - not found
npm ERR! gyp ERR! find VS not looking for VS2013 as it is only supported up to Node.js 8
npm ERR! gyp ERR! find VS
npm ERR! gyp ERR! find VS **************************************************************
npm ERR! gyp ERR! find VS You need to install the latest version of Visual Studio
npm ERR! gyp ERR! find VS including the "Desktop development with C++" workload.
npm ERR! gyp ERR! find VS For more information consult the documentation at:
npm ERR! gyp ERR! find VS https://github.com/nodejs/node-gyp#on-windows
npm ERR! gyp ERR! find VS **************************************************************
npm ERR! gyp ERR! find VS
npm ERR! gyp ERR! configure error
npm ERR! gyp ERR! stack Error: Could not find any Visual Studio installation to use
npm ERR! gyp ERR! stack at VisualStudioFinder.fail (C:\Users\priya\JSAIML\ytHelper\node_modules\node-gyp\lib\find-visualstudio.js:121:47)
npm ERR! gyp ERR! stack at C:\Users\priya\JSAIML\ytHelper\node_modules\node-gyp\lib\find-visualstudio.js:74:16
npm ERR! gyp ERR! stack at VisualStudioFinder.findVisualStudio2013 (C:\Users\priya\JSAIML\ytHelper\node_modules\node-gyp\lib\find-visualstudio.js:351:14)
npm ERR! gyp ERR! stack at C:\Users\priya\JSAIML\ytHelper\node_modules\node-gyp\lib\find-visualstudio.js:70:14
npm ERR! gyp ERR! stack at C:\Users\priya\JSAIML\ytHelper\node_modules\node-gyp\lib\find-visualstudio.js:372:16
npm ERR! gyp ERR! stack at C:\Users\priya\JSAIML\ytHelper\node_modules\node-gyp\lib\util.js:54:7
npm ERR! gyp ERR! stack at C:\Users\priya\JSAIML\ytHelper\node_modules\node-gyp\lib\util.js:33:16npm ERR! gyp ERR! stack at ChildProcess.exithandler (node:child_process:420:5)
npm ERR! gyp ERR! stack at ChildProcess.emit (node:events:513:28)
npm ERR! gyp ERR! stack at maybeClose (node:internal/child_process:1091:16)
npm ERR! gyp ERR! System Windows_NT 10.0.22000
npm ERR! gyp ERR! command "C:\\Users\\priya\\.nvm\\versions\\node\\v18.8.0\\bin\\node.exe" "C:\\Users\\priya\\JSAIML\\ytHelper\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
npm ERR! gyp ERR! cwd C:\Users\priya\JSAIML\ytHelper\node_modules\gl
npm ERR! gyp ERR! node -v v18.8.0
npm ERR! gyp ERR! node-gyp -v v7.1.2
npm ERR! gyp ERR! not ok
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\priya\AppData\Local\npm-cache\_logs\2023-01-08T17_34_38_565Z-debug-0.log```
this is how my code looks like
code ->
import express from 'express';
import * as brain from 'brain.js/dist/index.js';
import dotenv from 'dotenv'
import ytData from './md/data.js';
dotenv.config()
const app = express()
const PORT = process.env.PORT || 8000
const network = new brain.recurrent.LSTM();
const trainingData = ytData.map((item,i)=>({
input : item.title,
output : item.views,
}))
network.train(trainingData,{iterations : 2000});
const outputData = network.run("Simple Machine Learning With JavaScript - Brain.js")
app.get('/',(req,res)=>{
// res.json({message : `On this title you will probably get around ${outputData} views`})
res.send("hello")
})
app.listen(PORT, ()=>{
console.log(`Running up the hill at ${PORT}km/hr`)
})
**Any help will be appreciated.**

`npm install` fails on node-gyp rebuild with `env: python: No such file or directory` on mac pro m1

I am trying to do npm install and I am getting the error in my application
System details:
macOS Monterey : version 12.5
chip Apple M1 pro
node version: 14.19.3
node-gyp version: 9.1.0
python version:3.8.9
> snappy#6.3.5 install /Users/sanhp/client-access-portal/node_modules/snappy
> prebuild-install || node-gyp rebuild
prebuild-install WARN install No prebuilt binaries found (target=14.19.3 runtime=node arch=arm64 libc= platform=darwin)
CXX(target) Release/obj.target/snappy/deps/snappy/snappy-1.1.7/snappy-sinksource.o
CXX(target) Release/obj.target/snappy/deps/snappy/snappy-1.1.7/snappy-stubs-internal.o
CXX(target) Release/obj.target/snappy/deps/snappy/snappy-1.1.7/snappy.o
LIBTOOL-STATIC Release/snappy.a
env: python: No such file or directory
make: *** [Release/snappy.a] Error 127
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/Users/sanhp/.nvm/versions/node/v14.19.3/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:194:23)
gyp ERR! stack at ChildProcess.emit (events.js:400:28)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:285:12)
gyp ERR! System Darwin 21.6.0
gyp ERR! command "/Users/sanhp/.nvm/versions/node/v14.19.3/bin/node" "/Users/sanhp/.nvm/versions/node/v14.19.3/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/sanhp/client-access-portal/node_modules/snappy
gyp ERR! node -v v14.19.3
gyp ERR! node-gyp -v v5.1.0
gyp ERR! not ok

The issue is the missing default python in macos 12. Npm actually tells you
env: python: No such file or directory
To fix this you need to create a python symlink like so:
For homebrew installed python3:
ln -s "$(brew --prefix)/bin/python"{3,}
For any python3:
ln -s "$(which python3)"{3,}
For more information see: https://namespaceit.com/blog/env-python-no-such-file-or-directory-when-building-app-with-xcode

npm install is complaining that it cannot find python in the environment. To confirm that is the case run the following command
python --version
You should get a command not found exception. To resolve install python after which running the above command will tell you the version of python installed. Some versions of python have a slightly different binary name for example python3 so I recommend you install pyenv which can be used to manage multiple versions of python. Follow the instructions in the README to install pyenv and python. Once the previous command returns the python version you can then try 'npm install' again.

Strange npm error when running npm install brain.js

When trying to install brain.js, a strange error occurs and I can't understand what the problem is and where does the python come in since this is the installation of a library through npm. I didn't find similar situations in Google (I don’t even understand how to google this).
G:\firststep\BR>npm i brain.js
> gl#4.3.3 install G:\firststep\BR\node_modules\gl
> prebuild-install || node-gyp rebuild
prebuild-install WARN install No prebuilt binaries found (target=10.14.2 runtime=node arch=x64 libc= platform=win32)
G:\firststep\BR\node_modules\gl>if not defined npm_config_node_gyp (node "C:\Users\rafae\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin\\..\..\node_modules\node-gyp\bin\node-gyp.js" rebuild ) else (node "C:\Users\rafae\AppData\Roaming
\npm\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js" rebuild )
gyp ERR! find Python
gyp ERR! find Python Python is not set from command line or npm configuration
gyp ERR! find Python Python is not set from environment variable PYTHON
gyp ERR! find Python checking if "python" can be used
gyp ERR! find Python - "python" is not in PATH or produced an error
gyp ERR! find Python checking if "python2" can be used
gyp ERR! find Python - "python2" is not in PATH or produced an error
gyp ERR! find Python checking if the py launcher can be used to find Python 2
gyp ERR! find Python - "py.exe" is not in PATH or produced an error
gyp ERR! find Python checking if Python is C:\Python27\python.exe
gyp ERR! find Python - "C:\Python27\python.exe" could not be run
gyp ERR! find Python checking if Python is C:\Python37\python.exe
gyp ERR! find Python - "C:\Python37\python.exe" could not be run
gyp ERR! find Python
gyp ERR! find Python **********************************************************
gyp ERR! find Python You need to install the latest version of Python 2.7.
gyp ERR! find Python Node-gyp should be able to find and use Python. If not,
gyp ERR! find Python you can try one of the following options:
gyp ERR! find Python - Use the switch --python="C:\Path\To\python.exe"
gyp ERR! find Python (accepted by both node-gyp and npm)
gyp ERR! find Python - Set the environment variable PYTHON
gyp ERR! find Python - Set the npm configuration variable python:
gyp ERR! find Python npm config set python "C:\Path\To\python.exe"
gyp ERR! find Python For more information consult the documentation at:
gyp ERR! find Python https://github.com/nodejs/node-gyp#installation
gyp ERR! find Python **********************************************************
gyp ERR! find Python
gyp ERR! configure error
gyp ERR! stack Error: Could not find any Python installation to use
gyp ERR! stack at PythonFinder.fail (C:\Users\rafae\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\find-python.js:303:47)
gyp ERR! stack at PythonFinder.runChecks (C:\Users\rafae\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\find-python.js:132:21)
gyp ERR! stack at PythonFinder.<anonymous> (C:\Users\rafae\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\find-python.js:221:16)
gyp ERR! stack at PythonFinder.execFileCallback (C:\Users\rafae\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\find-python.js:267:16)
gyp ERR! stack at exithandler (child_process.js:301:5)
gyp ERR! stack at ChildProcess.errorhandler (child_process.js:313:5)
gyp ERR! stack at ChildProcess.emit (events.js:182:13)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:238:12)
gyp ERR! stack at onErrorNT (internal/child_process.js:407:16)
gyp ERR! stack at process._tickCallback (internal/process/next_tick.js:63:19)
gyp ERR! System Windows_NT 10.0.17763
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\rafae\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
gyp ERR! cwd G:\firststep\BR\node_modules\gl
gyp ERR! node -v v10.14.2
gyp ERR! node-gyp -v v5.0.3
gyp ERR! not ok
npm WARN enoent ENOENT: no such file or directory, open 'G:\firststep\BR\package.json'
npm WARN BR No description
npm WARN BR No repository field.
npm WARN BR No README data
npm WARN BR No license field.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! gl#4.3.3 install: `prebuild-install || node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the gl#4.3.3 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\rafae\AppData\Roaming\npm-cache\_logs\2019-08-14T18_48_29_640Z-debug.log
There is not a word about this problem in the documentation for brain.js. Everything is simple there - run npm install brain.js and that's it.
UPDATE 16.08.2019
This instruction marked option 2 helped me
https://github.com/nodejs/node-gyp#on-windows

Make sure the Path and Env variables are set for the Python installed. Also, I found something similar here.. hope it helps!!

Use the command without dot:
npm install brainjs

Blockstack App Fails on npm install ERR! configure error

I am trying to learn how to use blockstack https://docs.blockstack.org/browser/hello-blockstack.html which is a react.js type of application.
When I build the app and run npm install this is the error I receive:
C:\Users\Davidb.TC\Desktop\blockstack\hello-world-tutorial\node_modules\tiny-secp256k1>if not defined npm_config_node_gyp (node "C:\Users\Davidb.TC\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin\\..\..\node_modules\node-gyp\bin\node-gyp.js" rebuild ) else (node "C:\Users\Davidb.TC\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js" rebuild )
gyp ERR! configure error
gyp ERR! stack Error: Command failed: C:\Python37\python.EXE -c import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack File "<string>", line 1
gyp ERR! stack import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack ^
gyp ERR! stack SyntaxError: invalid syntax
gyp ERR! stack
gyp ERR! stack at ChildProcess.exithandler (child_process.js:294:12)
gyp ERR! stack at ChildProcess.emit (events.js:189:13)
gyp ERR! stack at maybeClose (internal/child_process.js:970:16)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:259:5)
gyp ERR! System Windows_NT 10.0.16299
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\Davidb.TC\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
gyp ERR! cwd C:\Users\Davidb.TC\Desktop\blockstack\hello-world-tutorial\node_modules\tiny-secp256k1
gyp ERR! node -v v10.15.3
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! tiny-secp256k1#1.0.1 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the tiny-secp256k1#1.0.1 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Davidb.TC\AppData\Roaming\npm-cache\_logs\2019-04-11T20_16_40_788Z-debug.log
Does anyone know what I must do to fix this error?

These types of node-gyp errors can be caused when Python 3 is installed on the system and it is expecting Python2.7. The node-gyp contributors claim Python3 support is not perfect at the moment and recommend Python2.7 if you encounter any problems.
It may not be necessary though to change Python versions in your case just yet, since it looks like you are on a Windows machine and it's failing on the node-gyp rebuild step. It's probably worth trying the following command first (make sure you are either in CMD or Powershell in Administrator mode:
npm install -g windows-build-tools
The windows-build-tools package is required for node-gyp to work properly on Windows, as stated here. After this, try running npm install again.
Still fails?
If the problem persist or another error related to node-gyp occurs, you might have to install Python2.7 and set npm to use Python2.7
npm config set python /path/to/executable/python2.7
You can read more about possible node-gyp issues and how to resolve them on the node-gyp github page.

Cannot install node-steam for node.js

I try to install node-steam from ... and got a big error
How can I fix that, is this my fault?
node-steam: https://github.com/seishun/node-steam
...
gyp ERR! configure error
gyp ERR! stack Error: Can't find Python executable "python", you can set the PYT
HON env variable.
gyp ERR! stack at failNoPython (C:\Program Files\nodejs\node_modules\npm\nod
e_modules\node-gyp\lib\configure.js:101:14)
gyp ERR! stack at C:\Program Files\nodejs\node_modules\npm\node_modules\node
-gyp\lib\configure.js:64:11
gyp ERR! stack at Object.oncomplete (fs.js:107:15)
gyp ERR! System Windows_NT 6.2.9200
gyp ERR! command "node" "C:\\Program Files\\nodejs\\node_modules\\npm\\node_modu
les\\node-gyp\\bin\\node-gyp.js" "configure" "build"
gyp ERR! cwd C:\Users\FongZooZ\Desktop\project\test\node_modules\steam\node_modu
les\ursa
gyp ERR! node -v v0.10.26
gyp ERR! node-gyp -v v0.12.2
gyp ERR! not ok
...
Please help me!

Go to Google and find Python 2.6 for your system. (https://www.python.org/download/releases/2.6/)
Download and install the python binaries.
Assuming you're using Windows, since you didn't tell us your OS, It's installed by default in C:\python26\python.exe.
Now open an empty CMD execute set PYTHON=C:\python26\python.exe, then run npm install node-steam and it should work.
Note: If you don't add the PYTHON to your PATH variable, you should type set PYTHON=C:\python26\python.exe before each installation that requires Python.
You can find a Linux binaries in their official site too.