From 2b577fcd5c15c579db36dfc461172113a2a85157 Mon Sep 17 00:00:00 2001
From: Dave Halter <davidhalter88@gmail.com>
Date: Wed, 17 Jan 2018 19:24:08 +0100
Subject: [PATCH] Clarity

---
 jedi/api/__init__.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/jedi/api/__init__.py b/jedi/api/__init__.py
index 2989d7e6..18b98959 100644
--- a/jedi/api/__init__.py
+++ b/jedi/api/__init__.py
@@ -117,7 +117,8 @@ class Script(object):
         # Load the Python grammar of the current interpreter.
         project = get_default_project()
         # TODO deprecate and remove sys_path from the Script API.
-        project._sys_path = sys_path
+        if sys_path is not None:
+            project._sys_path = sys_path
         self._evaluator = Evaluator(project, environment=environment, script_path=path)
         self._project = project
         debug.speed('init')