Check if prefix is valid identifier before requesting completion

Author: lgeiger

lib/main.js

@@ -2,6 +2,10 @@ const cp = require("child_process");
 const { shell } = require("electron");
 const { AutoLanguageClient } = require("atom-languageclient");
 
+// Ref: https://github.com/nteract/hydrogen/blob/master/lib/autocomplete-provider.js#L33
+// adapted from http://stackoverflow.com/q/5474008
+const PYTHON_REGEX = /([^\d\W]|[\u00A0-\uFFFF])[\w.\u00A0-\uFFFF]*$/;
+
 class PythonLanguageClient extends AutoLanguageClient {
   getGrammarScopes() {
     return ["source.python"];
@@ -40,6 +44,11 @@ class PythonLanguageClient extends AutoLanguageClient {
     );
     return childProcess;
   }
+
+  async getSuggestions(request) {
+    if (!PYTHON_REGEX.test(request.prefix)) return null;
+    return super.getSuggestions(request);
+  }
 }
 
 module.exports = new PythonLanguageClient();