title: error installing argon2 using npm install in node js (node-gyp) error
body: <p>I tried to install argon 2 on node js using <code>npm install argon2 --save</code>.
  I think there is a problem with python (not sure why) or with node-gyp.</p>
  
  <pre><code>PS C:\angular\backend&gt; npm install argon2 --save
  
  &gt; argon2@0.21.0 install C:\angular\backend\node_modules\argon2
  &gt; node-gyp rebuild
  
  
  C:\angular\backend\node_modules\argon2&gt;if not defined npm_config_node_gyp (node "C:\Users\matan\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\matan\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:\Users\matan\Anaconda3\python.EXE -c import sys; print "%s.%s.%s" % sys.version_info[:3];
  gyp ERR! stack   File "&lt;string&gt;", 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:276:12)
  gyp ERR! stack     at emitTwo (events.js:126:13)
  gyp ERR! stack     at ChildProcess.emit (events.js:214:7)
  gyp ERR! stack     at maybeClose (internal/child_process.js:915:16)
  gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
  gyp ERR! System Windows_NT 10.0.17134
  gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\matan\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
  gyp ERR! cwd C:\angular\backend\node_modules\argon2
  gyp ERR! node -v v8.12.0
  gyp ERR! node-gyp -v v3.8.0
  gyp ERR! not ok
  npm WARN enoent ENOENT: no such file or directory, open 'C:\angular\backend\package.json'
  npm WARN backend No description
  npm WARN backend No repository field.
  npm WARN backend No README data
  npm WARN backend No license field.
  
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! argon2@0.21.0 install: `node-gyp rebuild`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the argon2@0.21.0 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\matan\AppData\Roaming\npm-cache\_logs\2019-04-30T13_02_07_305Z-debug.log
  PS C:\angular\backend&gt;
  
  
  </code></pre>
  
  <p>expected argon2 to be installed to later be used for hashing.</p>