Merge pull request #186 from openatx/fix-patch-1

fix patch 1

Author: codeskyblue

adbutils/_utils.py

@@ -184,7 +184,7 @@ def update(self, chunk: bytes):
 
             copysize = humanize(self.copied)
             totalsize = humanize(self.total)
-            if sys.stdout.isatty():
+            if hasattr(sys.stdout, 'isatty') and sys.stdout.isatty():
                 print("{:.1f}%\t{} [{}/{}]".format(percent, speed, copysize,
                                                    totalsize))