Update app.py

app.py

@@ -241,6 +241,11 @@ class Command:
         self.data = data
 
 def parallel(*pairs):
+    if len(pairs) == 0:
+        return
+    if len(pairs) == 1:
+        pairs = pairs[0]
+
     async def async_main(queue):
         while True:
             command = await queue.get()
@@ -362,10 +367,10 @@ def handle(*inp):
     inp[1] = array(inp[1])
     inp[2] = array(inp[2])
     inp[3] = array(inp[3])
-    
-    out_pipe = []
+
+    parargs = [[calc,*inp] for i in range(ln)]
+    out_pipe = parallel(parargs)
     for i in range(ln):
-        out_pipe[i] = calc(*inp)
         name = generate_random_string(12)+".png"
         export_to_gif(out_pipe[i].frames[0],name,fps=fps)
         out_pipe[i] = name