Fix iterable in py3 uploader

Author: jhodges10

frameioclient/py3_uploader.py

@@ -23,7 +23,7 @@ def _get_session(self):
     return thread_local.session
 
   def _upload_chunk(self, task, i, total):
-    print(f"Starting chunk upload {i}/{total}")
+    print(f"Beginning chunk upload {i}/{total}")
     url = task[0]
     chunk = task[1]
     session = self._get_session()
@@ -33,7 +33,7 @@ def _upload_chunk(self, task, i, total):
       'x-amz-acl': 'private'
     })
 
-    print(f"Completed chunk {i}/{total}")
+    print(f"Completed chunk upload {i}/{total}")
 
   def upload(self):
     total_size = self.asset['filesize']
@@ -43,4 +43,4 @@ def upload(self):
     with concurrent.futures.ThreadPoolExecutor(max_workers=5) as executor:
       for i, chunk in enumerate(self._read_chunk(self.file, size)):
         task = (upload_urls[i], chunk)
-        executor.submit(self._upload_chunk, task, i, len(upload_urls))
+        executor.submit(self._upload_chunk, task, i+1, len(upload_urls))