我正在跟随一个关于在Ubuntu 20.04上安装torch的教程，其中一行需要设置
pyenv，类似于Python的virtualenv，这样我就可以运行多个Python版本。这有点不必要，但这是一个学习过程，也是一个学习另一个新工具的好机会，以后可能会用到。所以，在成功设置pyenv之后，这个命令失败了。sam@sam:~/torch$ pyenv virtualenv 3.8.2 torch
pyenv: no such command `virtualenv'
为了涵盖我的基础知识，我已经安装了virtualenv，如下所示
sam@sam:~/torch$ virtualenv
usage: virtualenv [--version] [--with-traceback] [-v | -q] [--app-data APP_DATA] [--clear-app-data] [--discovery {builtin}] [-p py] [--creator {builtin,cpython3-posix,venv}] [--seeder {app-data,pip}] [--no-seed]
[--activators comma_sep_list] [--clear] [--system-site-packages] [--symlinks | --copies] [--download | --no-download] [--extra-search-dir d [d ...]] [--progress version] [--retrying version] [--urllib3 version]
[--pep517 version] [--colorama version] [--CacheControl version] [--certifi version] [--requests version] [--contextlib2 version] [--appdirs version] [--chardet version] [--pytoml version] [--html5lib version]
[--lockfile version] [--six version] [--webencodings version] [--pyparsing version] [--setuptools version] [--packaging version] [--wheel version] [--ipaddr version] [--idna version] [--pip version] [--distro version]
[--pkg_resources version] [--distlib version] [--msgpack version] [--no-progress] [--no-retrying] [--no-urllib3] [--no-pep517] [--no-colorama] [--no-CacheControl] [--no-certifi] [--no-requests] [--no-contextlib2]
[--no-appdirs] [--no-chardet] [--no-pytoml] [--no-html5lib] [--no-lockfile] [--no-six] [--no-webencodings] [--no-pyparsing] [--no-setuptools] [--no-packaging] [--no-wheel] [--no-ipaddr] [--no-idna] [--no-pip] [--no-distro]
[--no-pkg_resources] [--no-distlib] [--no-msgpack] [--symlink-app-data] [--prompt prompt] [-h]
dest
virtualenv: error: the following arguments are required: dest
并且按照此处所示安装了pyenv
sam@sam:~/torch$ pyenv
pyenv 1.2.19-1-gece59ca8
Usage: pyenv <command> [<args>]
Some useful pyenv commands are:
commands List all available pyenv commands
exec Run an executable with the selected Python version
global Set or show the global Python version(s)
help Display help for a command
hooks List hook scripts for a given pyenv command
init Configure the shell environment for pyenv
install Install a Python version using python-build
local Set or show the local application-specific Python version(s)
prefix Display prefix for a Python version
rehash Rehash pyenv shims (run this after installing executables)
root Display the root directory where versions and shims are kept
shell Set or show the shell-specific Python version
shims List existing pyenv shims
uninstall Uninstall a specific Python version
--version Display the version of pyenv
version Show the current Python version(s) and its origin
version-file Detect the file that sets the current pyenv version
version-name Show the current Python version
version-origin Explain how the current Python version is set
versions List all Python versions available to pyenv
whence List all Python versions that contain the given executable
which Display the full path to an executable
See `pyenv help <command>' for information on a specific command.
For full documentation, see: https://github.com/pyenv/pyenv#readme
pyenv-virtualenv。仅当您安装了pyenv-virtualenv时，pyenv virtualenv命令才会生效。请参考https://github.com/pyenv/pyenv-virtualenv。 - Vishal Singhpyenv但忘记安装另一个依赖项pyenv-virtualenv。投票关闭此问题，因为它是微不足道的。第三方软件包virtualenv是不必要和无关紧要的。 - tripleeepip install pyenv-virtualenv给我返回了以下错误：`ERROR: Could not find a version that satisfies the requirement pyenv-virtualenv ERROR: No matching distribution found for pyenv-virtualenv`使用 Python 3.8.7 和 pip 21.0.1。 - SimpleJ