def get_username_for_svn_txn(repo_path, txn_id):
 return subproc_check_output(['svnlook', 'author', repo_path, '-t', txn_id]).strip()

def get_username_for_svn_txn ( repo_path , txn_id ) : return subproc_check_output ( [ 'svnlook' , 'author' , repo_path , '-t' , txn_id ] ) . strip ( )
returns username for an svn transaction .