yarn install failing import sys; print "%s.%s.%s" % sys.version_info[:3] invalid syntax

Question

When doing yarn install i get this error, but no issues one other projects, also used Brew to install node. Note sure what else should i try, any suggestions?

error */node_modules/node-sass: Command failed.
Exit code: 1
Command: node scripts/build.js
Arguments: 
Directory: */node_modules/node-sass
Output:
Building: /opt/homebrew/Cellar/node@14/14.18.1/bin/node */node_modules/node-gyp/bin/node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
gyp info it worked if it ends with ok
gyp verb cli [
gyp verb cli   '/opt/homebrew/Cellar/node@14/14.18.1/bin/node',
gyp verb cli   '*/node_modules/node-gyp/bin/node-gyp.js',
gyp verb cli   'rebuild',
gyp verb cli   '--verbose',
gyp verb cli   '--libsass_ext=',
gyp verb cli   '--libsass_cflags=',
gyp verb cli   '--libsass_ldflags=',
gyp verb cli   '--libsass_library='
gyp verb cli ]
gyp info using [email protected]
gyp info using [email protected] | darwin | arm64
gyp verb command rebuild []
gyp verb command clean []
gyp verb clean removing "build" directory
gyp verb command configure []
gyp verb check python checking for Python executable "/opt/homebrew/opt/[email protected]/bin/python3" in the PATH
gyp verb `which` succeeded /opt/homebrew/opt/[email protected]/bin/python3 /opt/homebrew/opt/[email protected]/bin/python3
gyp ERR! configure error 
gyp ERR! stack Error: Command failed: /opt/homebrew/opt/[email protected]/bin/python3 -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:383:12)
gyp ERR! stack     at ChildProcess.emit (events.js:400:28)
gyp ERR! stack     at maybeClose (internal/child_process.js:1058:16)
gyp ERR! stack     at Socket.<anonymous> (internal/child_process.js:443:11)
gyp ERR! stack     at Socket.emit (events.js:400:28)
gyp ERR! stack     at Pipe.<anonymous> (net.js:686:12)
gyp ERR! System Darwin 21.1.0
gyp ERR! command "/opt/homebrew/Cellar/node@14/14.18.1/bin/node" "*/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd */node_modules/node-sass
gyp ERR! node -v v14.18.1

• MacBook Pro M1 Max
• Node v16.13.0
• Npm 6.14.15

Answer 1

Fixed by upping the node-sass version

Answer 2

After updating MacOS to Monterey, this problem appeared. Simply reinstall and relink node version, and everything fixed.

Changed version to node@14 and fixed it. What i've done:

brew install node@14
brew unlink node
brew link --overwrite node@14

Here is an article with commands I've used https://medium.com/@georgeenathomas/3-step-process-to-downgrade-node-version-using-homebrew-bc0b0a72ae27

Answer 3

I'm getting this error while building the Vue.js and adding the Buefy to it:

File "<string>", line 1
gyp ERR! stack     import sys; print "%s.%s.%s" % sys.version_info[:3];

It seems that in my case the problem was that the version of node was not compatible with the version of node-sass in the package.json.

So the solution is to find a node-sass version compatible with the version of node installed on your machine.

Since I'm working on a fresh project to fix I could simply update my node the the last version and then use the node-sass compatible with it. Check this list to find out what's compatible

In my case this I did the following

1 | I updated the NODE to the last version (v16 in my case)

npm cache clean -f
npm install -g n
n stable

2 | I changed my node-sass version to the one compatible with node v16 in the package.json which is "node-sass": "~6.0",

Now, if I run yarn install it works like a charm

Answer 4

I removed my brew setup :

brew remove yarn
brew remove node
brew remove node@14

Then reinstalled everything without brew, this link helped me a lot : https://www.jurnalanas.com/node-js-mac-m1/

Finally reinstalled yarn :

rm -rf ~/.yarn
curl -o- -L https://yarnpkg.com/install.sh | bash

Answer 5

gyp ERR! stack   
import sys; print "%s.%s.%s" % sys.version_info[:3];
Invalid syntax 

This error occur due to python3 is used for executing the python2-only command line. I have tried executing the command with python2 and it work fine.

So the solution is temporarily removing python3 and replace python3's path with python2's path in your windows Environment Variables. Then run the npm line again!

This work for me so I hope it help you guys too

Answer 6

For me it was enough to remove yarn.lock and run yarn install again.

Answer 7

At the time of writing this answer, the current version of Node was 18 and the recommended version was 16. When trying to install a slightly older project, I was getting a request to install node-gyp. The specified error has appeared. I followed bdn's suggestion and installed 14. Now, not only that it didn't require node-gyp, it also installed smoothly.

nvm install 14
nvm exec 14 npm install

Answer 8

Fixed (mac os x catalina) by downgrading node@14.

Answer 9

I resolved similar issue by changing node-sass version in package.json to "node-sass": "4.14.1".

My "node --version" = "v14.18.0" and "npm --version" = "6.14.15"