Pyramid mongodb scaffold failing on Python 3 due to Paste

问题

Environment:

Python 3.2.3 (using virtualenv)
Pyramid 1.4
pyramid_mongodb scaffold

After installing myproject using pyramid_mongodb scaffold I ran python setup.py test -q and it's failing with below errors.

running build_ext
Traceback (most recent call last):
  File "setup.py", line 33, in <module>
    """,
  File "/usr/lib/python3.2/distutils/core.py", line 148, in setup
    dist.run_commands()
  File "/usr/lib/python3.2/distutils/dist.py", line 917, in run_commands
    self.run_command(cmd)
  File "/usr/lib/python3.2/distutils/dist.py", line 936, in run_command
    cmd_obj.run()
  File "/root/App/Big3/lib/python3.2/site-packages/distribute-0.6.24-py3.2.egg/setuptools    /command/test.py", line 137, in run
    self.with_project_on_sys_path(self.run_tests)
  File "/root/App/Big3/lib/python3.2/site-packages/distribute-0.6.24-py3.2.egg/setuptools    /command/test.py", line 117, in with_project_on_sys_path
    func()
  File "/root/App/Big3/lib/python3.2/site-packages/distribute-0.6.24-py3.2.egg/setuptools    /command/test.py", line 146, in run_tests
    testLoader = loader_class()
  File "/usr/lib/python3.2/unittest/main.py", line 123, in __init__
    self.parseArgs(argv)
  File "/usr/lib/python3.2/unittest/main.py", line 191, in parseArgs
    self.createTests()
  File "/usr/lib/python3.2/unittest/main.py", line 198, in createTests
    self.module)
  File "/usr/lib/python3.2/unittest/loader.py", line 132, in loadTestsFromNames
    suites = [self.loadTestsFromName(name, module) for name in names]
  File "/usr/lib/python3.2/unittest/loader.py", line 132, in <listcomp>
    suites = [self.loadTestsFromName(name, module) for name in names]
  File "/usr/lib/python3.2/unittest/loader.py", line 91, in loadTestsFromName
    module = __import__('.'.join(parts_copy))
  File "/root/App/Big3/Lime/lime/__init__.py", line 1, in <module>
    from pyramid.config import Configurator
  File "/root/App/Big3/lib/python3.2/site-packages/pyramid-1.4.1-py3.2.egg/pyramid/config    /__init__.py", line 10, in <module>
    from webob.exc import WSGIHTTPException as WebobWSGIHTTPException
  File "/root/App/Big3/lib/python3.2/site-packages/WebOb-1.2.3-py3.2.egg/webob/exc.py",         line 1115, in <module>
    from paste import httpexceptions
  File "/root/App/Big3/lib/python3.2/site-packages/Paste-1.7.5.1-py3.2.egg/paste                /httpexceptions.py", line 634
        except HTTPException, exc:
                        ^
    SyntaxError: invalid syntax

I understand the error, that Paste is not python3 compatible. I also know how to fix it but that would essentially mean porting Paste to python3 (which is something I don't want to do), so can anyone tell what I can do?

From the error stack I see that webob/exc.py is doing from paste import httpexceptions but when I checked the code I see that the import is under a try except block (without raising any error in except), so I even tried the test after removing paste from the lib but then when I run the test, I see that the setup.py is installing paste again

running test
Checking .pth file support in .
/root/App/Big3/bin/python -E -c pass
Searching for Paste>=1.7.1

I checked .pth files and removed reference to paste and then started re-installation of project but somehow it still sees paste as required

Installed /root/App/Big3/Myproject
Processing dependencies for Myproject==0.0
Searching for Paste>=1.7.1
Reading http://pypi.python.org/simple/Paste/

My setup.py file is same as this Can someone tell me where is this paste dependency coming into my project.

回答1:

I didn't intend to answer my own question but since I have made changes which are working for me, I thought I will share it here (assuming that there would be other folks wanting to have pyramid_mongodb scaffold work on python3)

Changes in development. ini

Removed

[pipeline:main]
pipeline =
    egg:WebError#evalerror
    {{project}}

Changed

[app:{{project}}] to [app:main]

Added (optional)

pyramid.includes =
    pyramid_debugtoolbar

Changed server (from paste to waitress)

[server:main]
use = egg:waitress#main
host = 0.0.0.0
port = 6543

Changes in Setup.py changed requires from

requires = ['pyramid', 'WebError', 'pymongo']

requires = ['pyramid', 'pyramid_debugtoolbar', 'pymongo', 'uwsgi', 'waitress']

It's important to remove webError

The application is now working...

来源：https://stackoverflow.com/questions/16312788/pyramid-mongodb-scaffold-failing-on-python-3-due-to-paste

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pyramid