Explain IPython kernel check

Author: MilesCranmer

pysrc/juliacall/__init__.py

@@ -252,8 +252,12 @@ def jlstr(x):
     CONFIG['autoload_extensions'] = choice('autoload_extensions', ['yes', 'no'])[0]
     if CONFIG['autoload_extensions'] in {'yes', None}:
         try:
+            # Get IPython `InteractiveShell` instance
             get_ipython = sys.modules['IPython'].get_ipython
 
+            # This line is a check for the IPython kernel being loaded to the
+            # interactive shell, so that we don't activate for other types of
+            # interactive shells).
             if 'IPKernelApp' not in get_ipython().config:
                 raise ImportError('console')