python 3 doesn't supported?

```
Traceback (most recent call last):
  File "./env/bin/md2pdf", line 7, in <module>
    from markdown2pdf import main
  File "/home/alp/wrk/visyond.com/repos/environment_root/util/checkbranch/env/lib/python3.6/site-packages/markdown2pdf/__init__.py", line 20
    print css_file
                 ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(print css_file)?
```