use str for zone id in _synthesize_grid()

- to be consistent with commit cce76e6.

Author: jdlph

path4gmns/__init__.py

@@ -6,7 +6,7 @@
 from .zonesyn import *
 
 
-__version__ = '0.9.6'
+__version__ = '0.9.7'
 
 
 # print out the current version

path4gmns/classes.py

@@ -291,7 +291,7 @@ class Zone:
 
     def __init__(self, zone_id, bin_index=0):
         self.no = -1
-        self.id = zone_id
+        self.id = str(zone_id)
         self.bin_id = bin_index
         self.production = 0
         self.centroid = None

path4gmns/zonesyn.py

@@ -139,7 +139,7 @@ def _synthesize_grid(ui, grid_dim, max_bin):
 
         (i, j) = _get_grid_id(x, y, res)
         if (i, j) not in grids.keys():
-            grids[(i, j)] = k
+            grids[(i, j)] = str(k)
             z = Zone(k)
             # boundaries (roughly)
             L_ = i * res
@@ -150,7 +150,7 @@ def _synthesize_grid(ui, grid_dim, max_bin):
             cx = (2 * x + L_ + R_) / 4
             cy = (2 * y + U_ + D_) / 4
             z.setup_geo(U_, D_, L_, R_, cx, cy)
-            zones[k] = z
+            zones[str(k)] = z
             k += 1
 
         zones[grids[(i, j)]].add_activity_node(node.get_node_id())

setup.py

@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name="path4gmns",
-    version="0.9.6",
+    version="0.9.7",
     author="Dr. Xuesong Zhou, Dr. Peiheng Li",
     author_email="xzhou74@asu.edu, jdlph@hotmail.com",
     description="An open-source, cross-platform, lightweight, and fast Python\