删除pip安装的所有软件包的最简单方法是什么？

本文翻译自：What is the easiest way to remove all packages installed by pip?

I'm trying to fix up one of my virtualenvs - I'd like to reset all of the installed libraries back to the ones that match production. 我正在尝试修复我的一个virtualenvs-我想将所有已安装的库重置为与生产版本匹配的库。

Is there a quick and easy way to do this with pip? 有没有一种快速简便的方法来使用pip？

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#1楼

参考：https://stackoom.com/question/lC8X/删除pip安装的所有软件包的最简单方法是什么

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#2楼

The quickest way is to remake the virtualenv completely. 最快的方法是完全重新制作virtualenv。 I'm assuming you have a requirements.txt file that matches production, if not: 我假设您有一个匹配生产的requirements.txt文件，如果不匹配：

# On production:
pip freeze > reqs.txt

# On your machine:
rm $VIRTUALENV_DIRECTORY
mkdir $VIRTUALENV_DIRECTORY
pip install -r reqs.txt

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#3楼

I've found this snippet as an alternative solution. 我已找到此代码段作为替代解决方案。 It's a more graceful removal of libraries than remaking the virtualenv: 与重建virtualenv相比，这是对库的更优雅的删除：

pip freeze | xargs pip uninstall -y

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In case you have packages installed via VCS, you need to exclude those lines and remove the packages manually (elevated from the comments below): 如果您通过VCS安装了软件包，则需要排除这些行并手动删除软件包（从下面的注释中升高）：

pip freeze | grep -v "^-e" | xargs pip uninstall -y

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#4楼

This works with the latest 这适用于最新

virtualenv --clear MYENV

But usually I just delete and recreate the virtualenv since immutability rules! 但是通常由于不变性规则，我只是删除并重新创建virtualenv！

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#5楼

Cross-platform support by using only pip : 仅使用pip跨平台支持：

#!/usr/bin/env python

from sys import stderr
from pip.commands.uninstall import UninstallCommand
from pip import get_installed_distributions

pip_uninstall = UninstallCommand()
options, args = pip_uninstall.parse_args([
    package.project_name
    for package in
    get_installed_distributions()
    if not package.location.endswith('dist-packages')
])

options.yes = True  # Don't confirm before uninstall
# set `options.require_venv` to True for virtualenv restriction

try:
    print pip_uninstall.run(options, args)
except OSError as e:
    if e.errno != 13:
        raise e
    print >> stderr, "You lack permissions to uninstall this package.
                      Perhaps run with sudo? Exiting."
    exit(13)
# Plenty of other exceptions can be thrown, e.g.: `InstallationError`
# handle them if you want to.

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#6楼

On Windows if your path is configured correctly, you can use: 在Windows上，如果您的path配置正确，则可以使用：

pip freeze > unins && pip uninstall -y -r unins && del unins

It should be a similar case for Unix-like systems: 对于类似Unix的系统，情况应该类似：

pip freeze > unins && pip uninstall -y -r unins && rm unins

Just a warning that this isn't completely solid as you may run into issues such as 'File not found' but it may work in some cases nonetheless 只是警告说这并不完全可靠，因为您可能会遇到诸如“找不到文件”之类的问题，但在某些情况下仍然可以使用

EDIT: For clarity: unins is an arbitrary file which has data written out to it when this command executes: pip freeze > unins 编辑：为清楚起见： unins是一个任意文件，当执行此命令时，数据已写入其中： pip freeze > unins

That file that it written in turn is then used to uninstall the aforementioned packages with implied consent/prior approval via pip uninstall -y -r unins 然后将其依次写入的文件用于通过pip uninstall -y -r unins隐含同意/事先批准的情况下卸载上述软件包。

The file is finally deleted upon completion. 该文件最终在完成后被删除。