Resolve undefined name unicode in Python 3

Resolve undefined name unicode in Python 3

moviepy/compat.py

@@ -2,7 +2,12 @@
 import sys
 PY3=sys.version_info.major >= 3
 
-if PY3:
-   from subprocess import DEVNULL  # py3k
-else:
-   DEVNULL = open(os.devnull, 'wb')
+try:
+    string_types = (str, unicode)     # Python 2
+except NameError:
+    string_types = (str)              # Python 3
+
+try:
+    from subprocess import DEVNULL    # Python 3
+except ImportError:
+    DEVNULL = open(os.devnull, 'wb')  # Python 2

moviepy/video/VideoClip.py

@@ -14,7 +14,7 @@
 from tqdm import tqdm
 
 from ..Clip import Clip
-from ..compat import DEVNULL, PY3
+from ..compat import DEVNULL, string_types
 from ..config import get_setting
 from ..decorators import (add_mask_if_none, apply_to_mask,
                           convert_masks_to_RGB, convert_to_seconds, outplace,
@@ -896,12 +896,8 @@ def __init__(self, img, ismask=False, transparent=True,
                  fromalpha=False, duration=None):
         VideoClip.__init__(self, ismask=ismask, duration=duration)
 
-        if PY3:
-            if isinstance(img, str):
-                img = imread(img)
-        else:
-            if isinstance(img, (str, unicode)):
-                img = imread(img)
+        if isinstance(img, string_types):
+            img = imread(img)
 
         if len(img.shape) == 3:  # img is (now) a RGB(a) numpy array