problems with python and virtualenvwrapper after u

问题:

I run python 2.7.6 with virtualenv, virtualenvwrapper under ubuntu 14.04. now i have installed python 2.7.9 from source. the new python interpreter is now located under /usr/local/bin but it seems the old interpreter is also located under /usr/bin.

if I run python shell it shows up python2.7.9. but if I use mkvirtualenv venv I am getting the following message.

New python executable in venv/bin/python
Installing setuptools, pip...done.
Blockquote /usr/local/bin/python: No module named virtualenvwrapper

old .bashrc (with working configuration using python 2.7.6 interpreter)

# virtualenv-wrappper path
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python
export VIRTUALENVWRAPPER_VIRTUALENV=/usr/local/bin/virtualenv
source /usr/local/bin/virtualenvwrapper.sh

new .bashrc (with failure configuration)

# virtualenv-wrappper path
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python
export VIRTUALENVWRAPPER_VIRTUALENV=/usr/local/bin/virtualenv
source /usr/local/bin/virtualenvwrapper.sh

with the new .baschrc I type in source .bashrc and get the following output.

/usr/local/bin/python: No module named virtualenvwrapper virtualenvwrapper.sh: There was a problem running the initialization hooks.

If Python could not import the module virtualenvwrapper.hook_loader, check that virtualenvwrapper has been installed for VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python and that PATH is set properly.

And I have also tried which -a python:

output:

/usr/local/bin/python
/usr/bin/python

I want to use python 2.7.9 with virtualenv and virtualenvwrapper. so what I have to do to get this running ?

回答1:

You need to install them under python 2.7.9 by specifying the path to correct version of pip to be used

/usr/local/bin/pip install virtualenv virtualenvwrapper

otherwise, when running pip install the sytem will use the default one (i.e. the one located at /usr/bin/pip)

回答2:

If you have modified your virtualenvwrapper to point to python3, like I do:

export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3

then make sure you install the virtualenv and virtualenvwrapper using:

sudo /usr/local/bin/pip3 install virtualenv virtualenvwrapper

回答3:

source /usr/local/bin/virtualenvwrapper_lazy.sh

---

when use pyenv:

export PYENV_ROOT="${HOME}/.pyenv"

if [ -d "${PYENV_ROOT}" ]; then
    export PATH="${PYENV_ROOT}/bin:${PATH}"
    eval "$(pyenv init -)"
fi
export PATH

export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_SCRIPT=/usr/local/bin/virtualenvwrapper.sh
#important
source /usr/local/bin/virtualenvwrapper_lazy.sh