Update seed feature (#44)

synthtiger/__init__.py

@@ -6,14 +6,24 @@
 
 from synthtiger import components, layers, templates, utils
 from synthtiger._version import __version__
-from synthtiger.gen import generator, read_config, read_template
+from synthtiger.gen import (
+    generator,
+    get_global_random_states,
+    read_config,
+    read_template,
+    set_global_random_seed,
+    set_global_random_states,
+)
 
 __all__ = [
     "components",
     "layers",
     "templates",
     "utils",
     "generator",
+    "get_global_random_states",
     "read_config",
     "read_template",
+    "set_global_random_seed",
+    "set_global_random_states",
 ]

synthtiger/gen.py

@@ -62,6 +62,27 @@ def generator(path, name, config=None, count=None, worker=0, seed=None, verbose=
             yield task_idx, data
 
 
+def get_global_random_states():
+    states = {
+        "random": random.getstate(),
+        "numpy": np.random.get_state(),
+        "imgaug": imgaug.random.get_global_rng().state,
+    }
+    return states
+
+
+def set_global_random_states(states):
+    random.setstate(states["random"])
+    np.random.set_state(states["numpy"])
+    imgaug.random.get_global_rng().state = states["imgaug"]
+
+
+def set_global_random_seed(seed):
+    random.seed(seed)
+    np.random.set_state(np.random.RandomState(np.random.MT19937(seed)).get_state())
+    imgaug.seed(seed)
+
+
 def _run(func, args):
     proc = Process(target=func, args=args)
     proc.daemon = True
@@ -89,13 +110,8 @@ def _worker(path, name, config, task_queue, data_queue, verbose):
 
 
 def _generate(template, seed, verbose):
-    temp_state = random.getstate()
-    temp_np_state = np.random.get_state()
-    temp_imgaug_state = imgaug.random.get_global_rng().state
-
-    random.seed(seed)
-    np.random.set_state(np.random.RandomState(np.random.MT19937(seed)).get_state())
-    imgaug.seed(seed)
+    states = get_global_random_states()
+    set_global_random_seed(seed)
 
     while True:
         try:
@@ -106,8 +122,5 @@ def _generate(template, seed, verbose):
             continue
         break
 
-    random.setstate(temp_state)
-    np.random.set_state(temp_np_state)
-    imgaug.random.get_global_rng().state = temp_imgaug_state
-
+    set_global_random_states(states)
     return data

synthtiger/main.py

@@ -17,6 +17,7 @@ def run(args):
 
     pprint.pprint(config)
 
+    synthtiger.set_global_random_seed(args.seed)
     template = synthtiger.read_template(args.script, args.name, config)
     generator = synthtiger.generator(
         args.script,