--- /home/ben/.emacs.d/elpa/python-mode-20160901.1048/python-mode.el~	2016-09-10 16:46:35.330124356 +0100
+++ /home/ben/.emacs.d/elpa/python-mode-20160901.1048/python-mode.el	2016-09-11 15:32:19.990935299 +0100
@@ -4411,7 +4411,8 @@
 If optional INDENT is given, use it"
   (interactive "*")
   (beginning-of-line)
-  (fixup-whitespace)
+  (unless (eq major-mode 'py-python-shell-mode)
+    (fixup-whitespace))
   (indent-to (or indent (py-compute-indentation)))
   (if (eobp)
       (newline-and-indent)