# OS X PyFR origin/develop branch: documention make failure

**URL:** <https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59>\
**Category:** General\
**Created:** [9 March 2015 18:02 UTC](https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59 "2015-03-09T18:02:41Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![Zach\_Davis](https://avatars.discourse-cdn.com/v4/letter/z/ed655f/32.png) [@Zach\_Davis](https://pyfr.discourse.group/u/Zach_Davis)\
**Post date:** [9 March 2015 18:02 UTC](https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59/1 "2015-03-09T18:02:41Z")

</div>

Peter, Freddie, et. al.,

I’m getting an error when attempting to make the documentation or run the pyfr/main.py scripts. I believe it may be due to the new python 3.3 dependency, but I wasn’t certain. If I have both python and python3 executables installed on my system pointing to 2.7.9 and 3.4.2; respectively, how do I ensure that PyFR uses python3 instead of python? The stack trace for the error I’m seeing is as follows:

```auto
Traceback (most recent call last):
File "/Users/zdavis/Applications/PyFR/pyfr/scripts/pyfr", line 6, in <module>
import pyfr.scripts.mesh
File "/Users/zdavis/Applications/PyFR/pyfr/scripts/mesh.py", line 10, in <module>
from pyfr.readers import BaseReader, get_reader_by_name, get_reader_by_extn
File "/Users/zdavis/Applications/PyFR/pyfr/readers/ __init__.py", line 3, in <module>
from pyfr.readers.base import BaseReader
File "/Users/zdavis/Applications/PyFR/pyfr/readers/base.py", line 10
class BaseReader(object, metaclass=ABCMeta):
^
SyntaxError: invalid syntax

```

Best Regards,

Zach Davis

---

<div class="post-metadata">

**Author:** ![p.vincent](https://yyz2.discourse-cdn.com/free1/user_avatar/pyfr.discourse.group/p.vincent/32/225_2.png) [@p.vincent](https://pyfr.discourse.group/u/p.vincent)\
**Post date:** [9 March 2015 18:28 UTC](https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59/2 "2015-03-09T18:28:19Z")

</div>

Hi Zach,

To avoid conflicts between different version of python and other dependencies I would suggest using virtualenv:

[http://docs.python-guide.org/en/latest/dev/virtualenvs/](http://docs.python-guide.org/en/latest/dev/virtualenvs/)

I am planning to add something to the User Guide in the near future suggesting the use of virtualenvs.

Cheers

Peter

---

<div class="post-metadata">

**Author:** ![Zach\_Davis](https://avatars.discourse-cdn.com/v4/letter/z/ed655f/32.png) [@Zach\_Davis](https://pyfr.discourse.group/u/Zach_Davis)\
**Post date:** [9 March 2015 22:51 UTC](https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59/3 "2015-03-09T22:51:32Z")

</div>

Hi Peter,

That seems to have resolved my earlier issue—thanks! I’ve got another one with regards to generating the documentation:

`(venv)[zdavis@Minerva doc]$ make latexpdf`

```auto
sphinx-build -b latex -d build/doctrees src build/latex
Making output directory...
Running Sphinx v1.2.3
Exception occurred:
File "/Users/zdavis/Applications/PyFR/venv/lib/python3.4/site-packages/sphinx/application.py", line 333, in setup_extension
mod = __import__ (extension, None, None, ['setup'])
File "/Users/zdavis/Applications/PyFR/doc/ext/tikz.py", line 166
except OSError, err:
^
SyntaxError: invalid syntax
The full traceback has been saved in /var/folders/x1/5xnw6dh50s78d6hcc234g8vh0000gn/T/sphinx-err-w21_0s8_.log, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
A bug report can be filed in the tracker at <[https://bitbucket.org/birkenfeld/sphinx/issues/](https://bitbucket.org/birkenfeld/sphinx/issues/)>. Thanks!
make: *** [latexpdf] Error 1

```

Best Regards,

Zach Davis

---

<div class="post-metadata">

**Author:** ![p.vincent](https://yyz2.discourse-cdn.com/free1/user_avatar/pyfr.discourse.group/p.vincent/32/225_2.png) [@p.vincent](https://pyfr.discourse.group/u/p.vincent)\
**Post date:** [9 March 2015 22:59 UTC](https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59/4 "2015-03-09T22:59:15Z")

</div>

Hi Zach,

Can you try with Sphinx 1.3b3 and see if that fixes things?

Cheers

Peter

---

<div class="post-metadata">

**Author:** ![fdw](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@fdw](https://pyfr.discourse.group/u/fdw)\
**Post date:** [9 March 2015 22:59 UTC](https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59/5 "2015-03-09T22:59:48Z")

</div>

Hi Zach,

Looks as if 2to3 never found its way into the doc/ext directory. Can  
you try running:

2to3 doc/ext \> changes.patch && patch -p0 \< changes.patch

and try again?

Regards, Freddie.

---

<div class="post-metadata">

**Author:** ![Zach\_Davis](https://avatars.discourse-cdn.com/v4/letter/z/ed655f/32.png) [@Zach\_Davis](https://pyfr.discourse.group/u/Zach_Davis)\
**Post date:** [9 March 2015 23:03 UTC](https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59/6 "2015-03-09T23:03:47Z")

</div>

Hi Freddie,

Here’s the output I get from your instructions:

`(venv)[zdavis@Minerva doc]$ 2to3 doc/ext > changes.patch && patch -p0 < changes.patch`

```auto
RefactoringTool: Skipping implicit fixer: buffer
RefactoringTool: Skipping implicit fixer: idioms
RefactoringTool: Skipping implicit fixer: set_literal
RefactoringTool: Skipping implicit fixer: ws_comma
RefactoringTool: Can't open doc/ext: [Errno 2] No such file or directory: 'doc/ext'
RefactoringTool: No files need to be modified.
RefactoringTool: There was 1 error:
RefactoringTool: Can't open doc/ext: [Errno 2] No such file or directory: 'doc/ext’

```

Peter,

I’m looking for that specific version in the pip repository. I’ll let you know what happens once I locate it.

Best Regards,

Zach Davis

---

<div class="post-metadata">

**Author:** ![fdw](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@fdw](https://pyfr.discourse.group/u/fdw)\
**Post date:** [9 March 2015 23:04 UTC](https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59/7 "2015-03-09T23:04:51Z")

</div>

Hi Zach,

Can you try running it from the root PyFR directory?

Regards, Freddie.

---

<div class="post-metadata">

**Author:** ![Zach\_Davis](https://avatars.discourse-cdn.com/v4/letter/z/ed655f/32.png) [@Zach\_Davis](https://pyfr.discourse.group/u/Zach_Davis)\
**Post date:** [9 March 2015 23:07 UTC](https://pyfr.discourse.group/t/os-x-pyfr-origin-develop-branch-documention-make-failure/59/8 "2015-03-09T23:07:00Z")

</div>

Hi Freddie,

My bad…that worked. Thanks!

Best Regards,

Zach Davis