From: Ole Streicher <olebole@debian.org>
Date: Sat, 5 Nov 2016 21:08:41 +0100
Subject: Set a default path for PYSYN_CDBS

In Debian, the data files are installed in /usr/share/synphot on
default. So, the environment variable needs to be set only if
different files are used.
---
 pysynphot/locations.py | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/pysynphot/locations.py b/pysynphot/locations.py
index 84e5d07..c22e6ce 100644
--- a/pysynphot/locations.py
+++ b/pysynphot/locations.py
@@ -40,12 +40,7 @@ import warnings
 from astropy.io import fits as pyfits
 from bs4 import BeautifulSoup
 
-try:
-    rootdir = os.environ['PYSYN_CDBS']
-except KeyError:
-    warnings.warn("PYSYN_CDBS is undefined; functionality will be SEVERELY "
-                  "crippled.")
-    rootdir = ''
+rootdir = os.environ.get('PYSYN_CDBS', '/usr/share/synphot')
 
 ftp_rootdir = 'https://ssb.stsci.edu/trds'