Hi,

Great! Glad you were able to get up and running. The dtests can be tricky if 
you aren't already somewhat familiar with Python.

Ariel

On Mon, Mar 26, 2018, at 9:10 PM, Murukesh Mohanan wrote:
> On Tue, Mar 27, 2018 at 6:47 Ariel Weisberg <ar...@weisberg.ws> wrote:
> 
> > Hi,
> >
> > Are you deleting the venv before creating it? You shouldn't really need to
> > use sudo for the virtualenv. That is going to make things potentially
> > wonky. Naming it cassandra-dtest might also do something wonky if you have
> > a cassandra-dtest directory already. I usually name it just venv and place
> > it in the same subdir as the requirements file.
> >
> > Also running sudo is going to create a new shell and then exit the shell
> > immediately so when you install the requirements it might be doing it not
> > in the venv, but in whatever is going on inside the sudo shell.
> 
> 
> Yep, looking at the logs, that's probably the issue. When activating a venv
> (with `source .../bin/activate`), it sets environment variables (`PATH`,
> `PYTHONHOME` etc.) so that the virtualenv's Python, pip are used instead of
> the system Python and pip. sudo defaults to using a clean PATH and
> resetting most of the user's environment, so the effects of the venv are
> lost when running in sudo.
> 
> 
> The advantage of virtualenv is not needing to mess with system packages at
> > all so sudo is inadvisable when creating, activating, and pip installing
> > things.
> >
> > You might need to use pip3 instead of pip, but I suspect that in a correct
> > venv pip is going to point to pip3.
> >
> > Ariel
> >
> > On Mon, Mar 26, 2018, at 5:31 PM, Tyagi, Preetika wrote:
> > > Yes, that's correct. I followed README and ran all below steps to create
> > > virtualenv. Attached is the output of all commands I ran successfully
> > > except the last one i.e. pytest.
> > >
> > > Could you please let me know if you see anything wrong or missing?
> > >
> > > Thanks,
> > > Preetika
> > >
> > > -----Original Message-----
> > > From: Ariel Weisberg [mailto:ar...@weisberg.ws]
> > > Sent: Monday, March 26, 2018 9:32 AM
> > > To: dev@cassandra.apache.org
> > > Subject: Re: question on running cassandra-dtests
> > >
> > > Hi,
> > >
> > > Your environment is python 2.7 when it should be python 3.
> > > See:
> > > >   File "/usr/local/lib/python2.7/dist-packages/_pytest/assertion/
> > > > rewrite.py", line 213, in load_module
> > >
> > > Are you using virtualenv to create a python 3 environment to use with
> > the tests?
> > >
> > > From README.md:
> > >
> > > **Note**: While virtualenv isn't strictly required, using virtualenv is
> > > almost always the quickest path to success as it provides common base
> > > setup across various configurations.
> > >
> > > 1. Install virtualenv: ``pip install virtualenv`` 2. Create a new
> > > virtualenv: ``virtualenv --python=python3 --no-site-packages ~/dtest``
> > > 3. Switch/Activate the new virtualenv: ``source ~/dtest/bin/activate``
> > > 4. Install remaining DTest Python dependencies: ``pip install -r /path/
> > > to/cassandra-dtest/requirements.txt``
> > >
> > > Regards,
> > > Ariel
> > >
> > > On Mon, Mar 26, 2018, at 11:13 AM, Tyagi, Preetika wrote:
> > > > I was able to run requirements.txt with success. Below is the error I
> > get:
> > > >
> > > > Traceback (most recent call last):
> > > >   File "/usr/local/lib/python2.7/dist-packages/_pytest/config.py",
> > > > line 371, in _importconftest
> > > >     mod = conftestpath.pyimport()
> > > >   File "/usr/local/lib/python2.7/dist-packages/py/_path/local.py",
> > > > line 668, in pyimport
> > > >     __import__(modname)
> > > >   File "/usr/local/lib/python2.7/dist-packages/_pytest/assertion/
> > > > rewrite.py", line 213, in load_module
> > > >     py.builtin.exec_(co, mod.__dict__)
> > > >   File "/usr/local/lib/python2.7/dist-packages/py/_builtin.py", line
> > > > 221, in exec_
> > > >     exec2(obj, globals, locals)
> > > >   File "<string>", line 7, in exec2
> > > >   File "/home/<path to conftest.py>/conftest.py", line 11, in <module>
> > > >     from itertools import zip_longest
> > > > ImportError: cannot import name zip_longest
> > > > ERROR: could not load /home/<path to conftest.py>/conftest.py
> > > >
> > > > Thanks,
> > > > Preetika
> > > >
> > > > -----Original Message-----
> > > > From: Murukesh Mohanan [mailto:murukesh.moha...@gmail.com]
> > > > Sent: Sunday, March 25, 2018 10:48 PM
> > > > To: dev@cassandra.apache.org
> > > > Subject: Re: question on running cassandra-dtests
> > > >
> > > > The complete error is needed. I get something similar if I hadn't run
> > > > `pip3 install -r requirements.txt`:
> > > >
> > > > Traceback (most recent call last):
> > > >   File "/usr/local/lib/python3.6/site-packages/_pytest/config.py",
> > > > line 328, in _getconftestmodules
> > > >     return self._path2confmods[path]
> > > > KeyError: local('/home/muru/dev/cassandra-dtest')
> > > >
> > > > During handling of the above exception, another exception occurred:
> > > > Traceback (most recent call last):
> > > >   File "/usr/local/lib/python3.6/site-packages/_pytest/config.py",
> > > > line 359, in _importconftest
> > > >     return self._conftestpath2mod[conftestpath]
> > > > KeyError: local('/home/muru/dev/cassandra-dtest/conftest.py')
> > > >
> > > > During handling of the above exception, another exception occurred:
> > > > Traceback (most recent call last):
> > > >   File "/usr/local/lib/python3.6/site-packages/_pytest/config.py",
> > > > line 365, in _importconftest
> > > >     mod = conftestpath.pyimport()
> > > >   File "/usr/local/lib/python3.6/site-packages/py/_path/local.py",
> > > > line 668, in pyimport
> > > >     __import__(modname)
> > > >   File "/usr/local/lib/python3.6/site-packages/_pytest/assertion/
> > > > rewrite.py", line 212, in load_module
> > > >     py.builtin.exec_(co, mod.__dict__)
> > > >   File "/home/muru/dev/cassandra-dtest/conftest.py", line 13, in
> > > > <module>
> > > >     from dtest import running_in_docker,
> > > > cleanup_docker_environment_before_test_execution
> > > >   File "/home/muru/dev/cassandra-dtest/dtest.py", line 12, in <module>
> > > >     import cassandra
> > > > ModuleNotFoundError: No module named 'cassandra'
> > > > ERROR: could not load /home/muru/dev/cassandra-dtest/conftest.py
> > > >
> > > > Of course, `pip3 install -r requirements.txt` creates an `src`
> > > > directory with appropriate branches of ccm and cassandra-driver
> > checked out.
> > > >
> > > > If you have run `pip3 install -r requirements.txt`, then something
> > > > else is wrong and we need the complete error log.
> > > >
> > > > On 2018/03/23 20:22:47, "Tyagi, Preetika" <preetika.ty...@intel.com>
> > wrote:
> > > > > Hi All,
> > > > >
> > > > > I am trying to setup and run Cassandra-dtests so that I can write
> > some tests for a JIRA ticket I have been working on.
> > > > > This is the repo I am using:
> > > > > https://github.com/apache/cassandra-dtest
> > > > > I followed all the instructions and installed dependencies.
> > > > >
> > > > > However, when I run "pytest -cassandra-dir=<path to Cassandra source
> > > > > root directory>
> > > > >
> > > > > It throws the error "could not load <some path>/conftest.py.
> > > > >
> > > > > I checked that this file (conftest.py) exists in Cassandra-dtest
> > source root and I'm not sure why it cannot find it. Does anyone have any
> > idea what might be going wrong here?
> > > > >
> > > > > I haven't used dtests before so I wonder if I'm missing something
> > here.
> > > > >
> > > > > Thanks,
> > > > > Preetika
> > > > >
> > > > >
> > > >
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> > > >
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> > >
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> > > Email had 1 attachment:
> > > + dtests_logs.txt
> > >   9k (text/plain)
> >
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> >
> > --
> 
> Murukesh Mohanan,
> Yahoo! Japan

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