Cannot install web3 npm install web3 fails

[chaitanya5]

web3 was working fine. But I don't know why web3 doesn't install anymore from today. I could use web3 1.2.1 previously in my other projects but it simply doesn't work anymore.Tried all solutions but still couldn't figure out.

`E:\Godfather\Smart Contracts\demo>npm install -g web3

sha3@1.2.3 install C:\Users\Godfather\AppData\Roaming\npm\node_modules\web3\node_modules\sha3
node-gyp rebuild

C:\Users\Godfather\AppData\Roaming\npm\node_modules\web3\node_modules\sha3>if not defined npm_config_node_gyp (node "C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin\....\node_modules\node-gyp\bin\node-gyp.js" rebuild ) else (node "C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js" rebuild )
gyp ERR! configure error
gyp ERR! stack Error: Command failed: C:\Users\Godfather\AppData\Local\Programs\Python\Python37\python.EXE -c import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack File "", 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:295:12)
gyp ERR! stack at ChildProcess.emit (events.js:203:13)
gyp ERR! stack at maybeClose (internal/child_process.js:1021:16)
gyp ERR! stack at Socket. (internal/child_process.js:430:11)
gyp ERR! stack at Socket.emit (events.js:203:13)
gyp ERR! stack at Pipe. (net.js:588:12)
gyp ERR! System Windows_NT 6.1.7601
gyp ERR! command "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js" "rebuild"
gyp ERR! cwd C:\Users\Godfather\AppData\Roaming\npm\node_modules\web3\node_modules\sha3
gyp ERR! node -v v12.7.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! sha3@1.2.3 install: node-gyp rebuild
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the sha3@1.2.3 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\Godfather\AppData\Roaming\npm-cache_logs\2019-09-13T17_42_53_292Z-debug.log`

[davalapar]

Have you got the things required for node-gyp environment

• Python
• MSBuild Tools
• Visual C++ Build Tools core features
• Windows 8.1 SDK
• Windows 10 SDK (10.0.x.x)

[chaitanya5]

It worked before though.I never showed the error. And now it works again after 2 days. Strange !!
I don't know how that worked again but thanks anyway .

[nivida]

Closed because all of the required tools, packages, and also python have been listed from @davalapar.