Simplify autoreload IPython script

* Avoids try...except statement, just use if clause
* Create an instance with `get_ipython()`
* Set autoreload 2 to load a module when it has been changed

Author: tomschr

.ipython/profile_default/startup/10-autoreload.py

@@ -1,7 +1,9 @@
-#
-try:
-    get_ipython().run_line_magic("load_ext", "autoreload")
-    get_ipython().run_line_magic("autoreload", "-p", "1")
+from IPython.core.getipython import get_ipython
+
+ipython = get_ipython()
+
+if ipython is not None:
+    ipython.run_line_magic("load_ext", "autoreload")
+    ipython.run_line_magic("autoreload", "2")
+
     print(" Automatically enabled autoreload")
-except Exception:
-    pass  # Not running inside IPython