PEP8: Fix formatting

* Remove redundant backslash between brackets
* Fix multiple statements on one line
* Fix missing/excess whitespace
* Fix comments not starting with a single # and a space
* Convert tabs to spaces
* Use triple-quoted docstring

core/utorrent/upload.py

@@ -1,5 +1,5 @@
 # coding=utf-8
-#code copied from http://www.doughellmann.com/PyMOTW/urllib2/
+# code copied from http://www.doughellmann.com/PyMOTW/urllib2/
 
 import itertools
 import mimetools
@@ -14,7 +14,7 @@ class MultiPartForm(object):
         self.files = []
         self.boundary = mimetools.choose_boundary()
         return
-    
+
     def get_content_type(self):
         return 'multipart/form-data; boundary=%s' % self.boundary
 
@@ -30,7 +30,7 @@ class MultiPartForm(object):
             mimetype = mimetypes.guess_type(filename)[0] or 'application/octet-stream'
         self.files.append((fieldname, filename, mimetype, body))
         return
-    
+
     def __str__(self):
         """Return a string representing the form data, including attached files."""
         # Build a list of lists, each containing "lines" of the
@@ -39,29 +39,28 @@ class MultiPartForm(object):
         # line is separated by '\r\n'.  
         parts = []
         part_boundary = '--' + self.boundary
-        
+
         # Add the form fields
         parts.extend(
-            [ part_boundary,
-              'Content-Disposition: form-data; name="%s"' % name,
-              '',
-              value,
-            ]
+            [part_boundary,
+             'Content-Disposition: form-data; name="%s"' % name,
+             '',
+             value,
+             ]
             for name, value in self.form_fields
-            )
-        
+        )
+
         # Add the files to upload
         parts.extend(
-            [ part_boundary,
-              'Content-Disposition: file; name="%s"; filename="%s"' % \
-                 (field_name, filename),
-              'Content-Type: %s' % content_type,
-              '',
-              body,
-            ]
+            [part_boundary,
+             'Content-Disposition: file; name="%s"; filename="%s"' % (field_name, filename),
+             'Content-Type: %s' % content_type,
+             '',
+             body,
+             ]
             for field_name, filename, content_type, body in self.files
-            )
-        
+        )
+
         # Flatten the list and add closing boundary marker,
         # then return CR+LF separated data
         flattened = list(itertools.chain(*parts))