From c2f7a62dbc0fbcb6f9676313adcd37db20af1840 2020-12-25 07:02:58
From: farisachugthai <farischugthai@gmail.com>
Date: 2020-12-25 07:02:58
Subject: [PATCH] BUG: Don't index args unless we know we can

Otherwise we get an `IndexError` on any command that didn't require
more arguments. For example running a bare `%conda` raises currently.

In addition, `%conda list` raises as there aren't enough args for
-        args = args[1:]

---

diff --git a/IPython/core/magics/packaging.py b/IPython/core/magics/packaging.py
index 9f76088..e5e6877 100644
--- a/IPython/core/magics/packaging.py
+++ b/IPython/core/magics/packaging.py
@@ -82,8 +82,9 @@ class PackagingMagics(Magics):
 
         conda = _get_conda_executable()
         args = shlex.split(line)
-        command = args[0]
-        args = args[1:]
+        command = args[0] if len(args) > 0 else ""
+        args = args[1:] if len(args) > 1 else [""]
+
         extra_args = []
 
         # When the subprocess does not allow us to respond "yes" during the installation,