From aaf0705ce90aa7c59680ef3f5ce57a362ede4086 Mon Sep 17 00:00:00 2001
From: Kouhei Maeda <mkouhei@palmtb.net>
Date: Sat, 19 Sep 2020 14:33:25 +0900
Subject: [PATCH] Fixes raise-missing-from violation.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
---
 bootstrap_py/pypi.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bootstrap_py/pypi.py b/bootstrap_py/pypi.py
index 7e7833a..749d16d 100644
--- a/bootstrap_py/pypi.py
+++ b/bootstrap_py/pypi.py
@@ -30,4 +30,4 @@ def package_existent(name):
             Timeout,
             ConnectionError,
             HTTPError) as exc:
-        raise BackendFailure(exc)
+        raise BackendFailure(exc) from exc