Add backward support for urllib

* wqflask/base/trait.py: Remove unused imports
* wqflask/db/call.py (Bench): Add urllib2 fallback for python2

2 files changed, 10 insertions, 4 deletions

diff --git a/wqflask/base/trait.py b/wqflask/base/trait.py
index 05b272c3..a19b66f7 100644
--- a/wqflask/base/trait.py
+++ b/wqflask/base/trait.py
@@ -6,7 +6,6 @@ import resource
 import codecs
 import requests
 import random
-import urllib.request, urllib.parse, urllib.error
 
 from base import webqtlConfig
 from base.webqtlCaseData import webqtlCaseData
@@ -607,4 +606,4 @@ def retrieve_trait_info(trait, dataset, get_qtl_info=False):
     else:
         raise KeyError(repr(trait.name)+' information is not found in the database.')
         
-    return trait
\ No newline at end of file
+    return trait
diff --git a/wqflask/db/call.py b/wqflask/db/call.py
index 3b8f782e..0971d2a2 100644
--- a/wqflask/db/call.py
+++ b/wqflask/db/call.py
@@ -3,7 +3,10 @@
 from flask import g
 
 import string
-import urllib.request, urllib.error, urllib.parse
+try:  # Python2 support
+    import urllib.request, urllib.error, urllib.parse
+except:
+    import urllib2
 import json
 from utility.tools import USE_GN_SERVER, LOG_SQL, GN_SERVER_URL
 from utility.benchmark import Bench
@@ -59,7 +62,11 @@ def gn_server(path):
 
     """
     with Bench("GN_SERVER", LOG_SQL):
-        res = urllib.request.urlopen(GN_SERVER_URL+path)
+        res = ()
+        try:
+            res = urllib.request.urlopen(GN_SERVER_URL+path)
+        except:
+            res = urllib2.urlopen(GN_SERVER_URL+path)
         rest = res.read()
         res2 = json.loads(rest)
         logger.debug(res2)