3 files changed, 3 insertions, 12 deletions
diff --git a/youtube_dl/downloader/common.py b/youtube_dl/downloader/common.py
index e9c9b4473..10143d56a 100644
--- a/youtube_dl/downloader/common.py
+++ b/youtube_dl/downloader/common.py
@@ -1,7 +1,5 @@
-import math
 import os
 import re
-import subprocess
 import sys
 import time
 
@@ -175,7 +173,7 @@ class FileDownloader(object):
                 return
             os.rename(encodeFilename(old_filename), encodeFilename(new_filename))
         except (IOError, OSError) as err:
-            self.report_error(u'unable to rename file')
+            self.report_error(u'unable to rename file: %s' % str(err))
 
     def try_utime(self, filename, last_modified_hdr):
         """Try to set the last-modified time of the given file."""
@@ -279,8 +277,6 @@ class FileDownloader(object):
         """Download to a filename using the info from info_dict
         Return True on success and False otherwise
         """
-        url = info_dict['url']
-
         # Check file already present
         if self.params.get('continuedl', False) and os.path.isfile(encodeFilename(filename)) and not self.params.get('nopart', False):
             self.report_file_already_downloaded(filename)
@@ -290,8 +286,8 @@ class FileDownloader(object):
                 'total_bytes': os.path.getsize(encodeFilename(filename)),
             })
             return True
-        else:
-            return self.real_download(filename, info_dict)
+
+        return self.real_download(filename, info_dict)
 
     def real_download(self, filename, info_dict):
         """Real download process. Redefine in subclasses."""
diff --git a/youtube_dl/downloader/http.py b/youtube_dl/downloader/http.py
index dbc5af3ca..14b88efd3 100644
--- a/youtube_dl/downloader/http.py
+++ b/youtube_dl/downloader/http.py
@@ -1,7 +1,4 @@
 import os
-import re
-import subprocess
-import sys
 import time
 
 from .common import FileDownloader
diff --git a/youtube_dl/extractor/bliptv.py b/youtube_dl/extractor/bliptv.py
index a32891c17..c7e0a53c1 100644
--- a/youtube_dl/extractor/bliptv.py
+++ b/youtube_dl/extractor/bliptv.py
@@ -1,6 +1,5 @@
 import datetime
 import json
-import os
 import re
 import socket
 
@@ -66,7 +65,6 @@ class BlipTVIE(InfoExtractor):
         request = compat_urllib_request.Request(json_url)
         request.add_header('User-Agent', 'iTunes/10.6.1')
         self.report_extraction(mobj.group(1))
-        info = None
         urlh = self._request_webpage(request, None, False,
             u'unable to download video info webpage')