Explicit Imports (#498)

* expand imports

* optimize

* miss

* fix

hubconf.py

@@ -6,13 +6,12 @@ Usage:
 """
 
 dependencies = ['torch', 'yaml']
-
 import os
 
 import torch
 
 from models.yolo import Model
-from utils import google_utils
+from utils.google_utils import attempt_download
 
 
 def create(name, pretrained, channels, classes):
@@ -32,7 +31,7 @@ def create(name, pretrained, channels, classes):
         model = Model(config, channels, classes)
         if pretrained:
             ckpt = '%s.pt' % name  # checkpoint filename
-            google_utils.attempt_download(ckpt)  # download if not found locally
+            attempt_download(ckpt)  # download if not found locally
             state_dict = torch.load(ckpt, map_location=torch.device('cpu'))['model'].float().state_dict()  # to FP32
             state_dict = {k: v for k, v in state_dict.items() if model.state_dict()[k].shape == v.shape}  # filter
             model.load_state_dict(state_dict, strict=False)  # load