Crash on the correct Python 3 script with Syntax error

[pepr]

Hi and thanks for the filter. I have started the asciidoc porting to Python 3, and I have used Doxygen to get a big picture. The script was converted with 2to3. The syntax error is reported for the print(line, file=f) (which is not what is normally used, in my opinion, anyway):

Generating code for file asciidoc3.py...
Traceback (most recent call last):
  File "C:\Python27\lib\runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "C:\Python27\lib\runpy.py", line 72, in _run_code
    exec code in run_globals
  File "C:\Python27\lib\site-packages\doxypypy-0.8.8.6-py2.7.egg\doxypypy\doxypy
py.py", line 836, in <module>
    main()
  File "C:\Python27\lib\site-packages\doxypypy-0.8.8.6-py2.7.egg\doxypypy\doxypy
py.py", line 830, in main
    astWalker.parseLines()
  File "C:\Python27\lib\site-packages\doxypypy-0.8.8.6-py2.7.egg\doxypypy\doxypy
py.py", line 741, in parseLines
    inAst = parse(''.join(self.lines), self.inFilename)
  File "C:\Python27\lib\ast.py", line 37, in parse
    return compile(source, filename, mode, PyCF_ONLY_AST)
  File "D:/Software/asciidoc/asciidoc3.py", line 6061
    print(line, file=f)
                    ^
SyntaxError: invalid syntax

The problem can be manifested at the sources from https://github.com/pepr/asciidoc/tree/py3dev, commit point a1799470619. The last official Doxygen and graphviz were installed. When the line is replaced by f.write(line + '\n'), the filter works fine -- see commit d64db2f9bed.

[Feneric]

It looks like you were running doxypypy under Python 2 for Python 3 code. Please try it again running doxypypy under Python 3. Just use your favorite Python package manager to install it for Python 3 and tell Doxygen to use that version.

Since doxypypy uses the Python interpreter to figure out Python code, running it under Python 2 for Python 3 code isn't supported.

[pepr]

You are right. I am using it on Windows (that is clear from the error message). When installing doxypypy (and using the Python Launcher for Windows), I just typed setup install. Because of the #!/usr/bin/env python inside, Python 2 was lauched and it was installed (in my case) into C:\Python27. My second mistake was to use to use py -m doxypypy.doxypypy -a -c %1 in my doxypy_filter.bat. This way, the launcher also calls Python 2 by default.

So, I did install doxypypy via py -3 setup.py install (it went to my C:\Python35 directory), and later also via py -3.4 setup.py install (it went to my older C:\Python34 directory).

Then, when changing the doxypy_filter.bat to py -3 -m doxypypy.doxypypy -a -c %1, Python 3 is used and everything works perfectly. It works perfectly also for py -3.4 -m doxypypy.doxypypy -a -c %1.

To summarize, I can confirm it works fine on Windows for Python 2.7 (32 bit), Python 3.4 (32 bit), and also for Python 3.5 (64 bit).

Thanks a lot,
Petr

[Feneric]

Excellent news, thank you. It's probably something we should add to the documentation. It's important to run doxypypy with the version of Python used by the source being analyzed.