Question

我已经使用python2.6在系统上安装了virtualenv。

我将系统python升级到2.7，但virtualenv仍然具有python2.6的亲和力。

我尝试了easy_install --upgrade virtualenv，但这没有改变任何东西。

有谁知道如何更新系统安装的virtualenv以在系统上使用新的python2.7？

Answer 1

pip，easy_install和virtualenv命令安装在 per python版本（python 2.6,2.7等）。

您必须为您的python版本安装easy_install的新副本（请参阅setuptools installation instructions，或对installing it directly pip执行相同操作。

然后，您可以使用与python 2.7绑定的新安装来安装virtualenv。

新命令可能已安装为pip-2.7或easy_install-2.7;请参阅setuptools documentation on multiple python versions，pip和easy_install本身可能是其2.6版本的符号链接。尝试并运行pip-2.7 install virtualenv或easy_install-2.7 virtualenv。

如果这对您不起作用，您可以随时使用-m开关：

python2.7 -m easy_install virtualenv

Answer 2

您可以在虚拟环境中尝试pip install -U python，不确定它会破坏什么。

您还可以更改指向旧Python的符号链接，但不确定会产生哪些副作用。

我会推荐最安全的路径，即首先pip freeze > installed.txt，然后使用新的Python和pip install -r installed.txt重新创建你的virtualenv。

Answer 3

我创建了一个脚本来重新生成你的virtualenv：https://gist.github.com/WoLpH/fb98f7dc6ba6f05da2b8

如果要更新许多内容，可以使用此脚本使用GNU Parallel并行化它：https://gist.github.com/WoLpH/fb98f7dc6ba6f05da2b8#file-recreate_virtualenvs-sh

#!/bin/zsh -e

export PATH="/usr/local/bin:$PATH"
. $(which virtualenvwrapper.sh)

envs=$(find ~/envs -mindepth 1 -maxdepth 1 -type d -print -or -name '*.sparseimage' -print | sed -e 's/.*\///' | sed 's/.sparseimage$//' | sort -u)
echo "$envs" | parallel -v --no-notice ~/scripts/recreate_virtualenv.sh {}

只需将其复制到文件（上面的可下载链接）并执行如下：zsh -e recreate_virtualenvs.sh <project_name>

#!/bin/zsh -e

if [ ! -d "$PROJECT_HOME" ]; then
    echo 'Your $PROJECT_HOME needs to be defined'
    echo 'http://virtualenvwrapper.readthedocs.org/en/latest/install.html#location-of-project-directories'
    exit 1
fi

if [ "" = "$1" ]; then
    echo "Usage: $0 <project_name>"
    exit 1
fi

env="$1"
project_dir="$PROJECT_HOME/$1"
env_dir="$HOME/envs/$1"

function command_exists(){
    type $1 2>/dev/null | grep -vq ' not found'
}

if command_exists workon; then
    echo 'Getting virtualenvwrapper from environment'
    # Workon exists, nothing to do :)

elif [ -x ~/bin/mount_workon ]; then
    echo 'Using mount workon'
    # Optional support for packaged project directories and virtualenvs using
    # https://github.com/WoLpH/dotfiles/blob/master/bin/mount_workon
    . ~/bin/mount_workon
    mount_file "$project_dir"
    mount_file "$env_dir"

elif command_exists virtualenvwrapper.sh; then
    echo 'Using virtualenvwrapper'
    . $(which virtualenvwrapper.sh)
fi

if ! command_exists workon; then
    echo 'Virtualenvwrapper not found, please install it'
    exit 1
fi

rmvirtualenv $env || true

echo "Recreating $env"
mkvirtualenv $env || true
workon "$env" || true
pip install virtualenv{,wrapper}

cd $project_dir
setvirtualenvproject 

if [ -f setup.py ]; then
    echo "Installing local package"
    pip install -e .
fi

function install_requirements(){
    # Installing requirements from given file, if it exists
    if [ -f "$1" ]; then
        echo "Installing requirements from $1"
        pip install -r "$1"
    fi
}

install_requirements requirements_test.txt
install_requirements requirements-test.txt
install_requirements requirements.txt
install_requirements test_requirements.txt
install_requirements test-requirements.txt

if [ -d docs ]; then
    echo "Found docs, installing sphinx"
    pip install sphinx{,-pypi-upload} py
fi

echo "Installing ipython"
pip install ipython

if [ -f tox.ini ]; then
    deps=$(python -c "
parser=__import__('ConfigParser').ConfigParser();
parser.read('tox.ini');
print parser.get('testenv', 'deps').strip().replace('{toxinidir}/', '')")
    echo "Found deps from tox.ini: $deps"
    echo $deps | parallel -v --no-notice pip install {}
fi

if [ -f .travis.yml ]; then
    echo "Found deps from travis:"
    installs=$(grep 'pip install' .travis.yml | grep -v '\$' | sed -e 's/.*pip install/pip install/' | grep -v 'pip install . --use-mirrors' | sed -e 's/$/;/')
    echo $installs
    eval $installs
fi

deactivate

如何升级virtualenv以使用新的系统python？

3 个答案: