Update gridsearch.py (#84)

Fix Unittest of cifar download

mim/commands/gridsearch.py

@@ -278,7 +278,7 @@ def gridsearch(
     for arg in search_args_dict:
         try:
             arg_value = get_config(cfg, arg)
-            if arg_value and not isinstance(arg_value, str):
+            if arg_value is not None and not isinstance(arg_value, str):
                 search_args_dict[arg] = [
                     eval(x) for x in search_args_dict[arg]
                 ]

tests/test_download.py

@@ -42,10 +42,10 @@ def test_download():
 
     # mim download mmcls --config resnet18_b16x8_cifar10
     checkpoints = download('mmcls', ['resnet18_b16x8_cifar10'])
-    assert checkpoints == ['resnet18_b16x8_cifar10_20200823-f906fa4e.pth']
+    assert checkpoints == ['resnet18_b16x8_cifar10_20210528-bd6371c8.pth']
     checkpoints = download('mmcls', ['resnet18_b16x8_cifar10'])
 
     # mim download mmcls --config resnet18_b16x8_cifar10 --dest temp_root
     with tempfile.TemporaryDirectory() as temp_root:
         checkpoints = download('mmcls', ['resnet18_b16x8_cifar10'], temp_root)
-        assert checkpoints == ['resnet18_b16x8_cifar10_20200823-f906fa4e.pth']
+        assert checkpoints == ['resnet18_b16x8_cifar10_20210528-bd6371c8.pth']