Added caching for generated images

testfile cartopy.py

@@ -65,14 +65,22 @@ def get_radar_frames(site, datetime_t, num_frames):
     closest_datetime = _nearestDate(datetimes, datetime_t)
     index = datetimes.index(closest_datetime)
 
-    radarFrames = [0] * num_frames
+    #radarFrames = [0] * num_frames
+    radarFrames = {}
     i = index
     printdebug('Pulling all the radar images requested')
     while i > (index - num_frames) and i >= 0:
-        radarFrames[num_frames - ((index - i) + 1)] = get_radar_from_aws(keys[i].Object())
+        #radarFrames[num_frames - ((index - i) + 1)] = get_radar_from_aws(keys[i].Object())
+        filename = keys[i].key.replace('/', '_')
+        radarFrames[filename] = get_radar_from_aws(keys[i].Object())
         i = i - 1
     
-    return radarFrames
+    sortedIndices = sorted(radarFrames)
+    sortedRadarFrames = {}
+    for key in sortedIndices:
+        sortedRadarFrames[key] = radarFrames[key]
+
+    return sortedRadarFrames
 
 def get_radar_from_aws(aws_object):
     """
@@ -150,7 +158,7 @@ def generate_radar_image(radar_data, tiler, mercator):
     ax.add_image(tiler, 6)
     printdebug('Plotting!')
     display.plot_ppi_map('reflectivity', sweep = 0, resolution='10m',
-                        vmin = 10, vmax = 64,
+                        vmin = -8, vmax = 64,
                         cmap = "ChaseSpectral",
                         min_lat = min_lat, min_lon = min_lon,
                         max_lat = max_lat, max_lon = max_lon,
@@ -165,22 +173,33 @@ def generate_radar_image(radar_data, tiler, mercator):
 
 fmt = '%Y%m%d_%H%M%S' 
 currentDatetime = datetime.now(timezone.utc)
-num_frames = 10
+num_frames = 20
 secondary_frames = [0] * (num_frames - 1)
 
 radar = get_radar_frames('KVNX', currentDatetime, num_frames=num_frames)
+print(list(radar.keys()))
 
 tiler = OSM(cache=True)
 mercator = tiler.crs
 
-firstFrameFig = generate_radar_image(radar[0], tiler, mercator)
-firstFrame = convert_fig_to_img(firstFrameFig)
+radarKeys = list(radar.keys())
+
+if not os.path.isfile(f'cache/radarimages/{radarKeys[0]}.png'):    
+    firstFrameFig = generate_radar_image(radar[radarKeys[0]], tiler, mercator)
+    firstFrame = convert_fig_to_img(firstFrameFig)
+    firstFrame.save(f'cache/radarimages/{radarKeys[0]}.png')
+else:
+    firstFrame = Image.open(f'cache/radarimages/{radarKeys[0]}.png')
+
 i = 0
 for i in range(num_frames - 1):
-    fig = generate_radar_image(radar[i + 1], tiler, mercator)
-    secondary_frames[i] = convert_fig_to_img(fig)
-    # filename = aws_object.key.replace('/', '_')
+    if not os.path.isfile(f'cache/radarimages/{radarKeys[i + 1]}.png'):
+        fig = generate_radar_image(radar[radarKeys[i + 1]], tiler, mercator)
+        secondary_frames[i] = convert_fig_to_img(fig)
+        secondary_frames[i].save(f'cache/radarimages/{radarKeys[i + 1]}.png')
+    else:
+        secondary_frames[i] = Image.open(f'cache/radarimages/{radarKeys[i + 1]}.png')
 
 datetimeString = datetime.strftime(currentDatetime, fmt)
 
-firstFrame.save(f'testradar_{datetimeString}.gif', append_images=secondary_frames, duration=200)
+firstFrame.save(f'testradar_{datetimeString}.webp', append_images=secondary_frames, duration=200)