SyntaxError: invalid token in python 3.7

[KasperThystrup]

Hi, I'm uncertain whether this tool runs from python 2.7 or python 3.X - it is not stated from http://rnaeditor.uni-frankfurt.de/install.php

Description
When executing the RNAeditor script from python 3.+ runs into the following issue:
File "RNAEditor.py", line 59
os.makedirs(self.outdir, mode=0755)

Solution
For python3.+ the issue would be solved by replacing the 0755 values from the os commands to o0755. However if this tool runs on 2.7 I don't know whether this causes other issues.