def get_file_for_svn_txn(repo_path, txn_id, filename):
 return subproc_check_output(['svnlook', 'cat', repo_path, '-t', txn_id, filename])

def get_file_for_svn_txn ( repo_path , txn_id , filename ) : return subproc_check_output ( [ 'svnlook' , 'cat' , repo_path , '-t' , txn_id , filename ] )
returns file in an svn transaction .