Add Python3 compatibility

src/config/__init__.py

@@ -1 +1,4 @@
-from kitti_squeezeSeg_config import kitti_squeezeSeg_config
+try:
+  from kitti_squeezeSeg_config import kitti_squeezeSeg_config
+except:
+  from config.kitti_squeezeSeg_config import kitti_squeezeSeg_config

src/config/kitti_squeezeSeg_config.py

@@ -4,7 +4,11 @@
 
 import numpy as np
 
-from config import base_model_config
+try:
+  from config import base_model_config
+except:
+  from config.config import base_model_config
+
 
 def kitti_squeezeSeg_config():
   """Specify the parameters to tune below."""

src/imdb/__init__.py

@@ -1 +1,4 @@
-from kitti import kitti
+try:
+  from kitti import kitti
+except:
+  from imdb.kitti import kitti

src/imdb/kitti.py

@@ -6,7 +6,10 @@
 import numpy as np
 import subprocess
 
-from imdb import imdb
+try:
+  from imdb import imdb
+except:
+  from imdb.imdb import imdb
 
 class kitti(imdb):
   def __init__(self, image_set, data_path, mc):

src/nets/__init__.py

@@ -1 +1,4 @@
-from squeezeSeg import SqueezeSeg
+try:
+  from squeezeSeg import SqueezeSeg
+except:
+  from nets.squeezeSeg import SqueezeSeg