安装pip3

Question

我按照这里的指示安装了pip3；我需要它来安装其他的python3包。我不记得我是否在很久以前安装了pip3。运行sudo apt install python3-pip后，我得到以下输出：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
python3-pip is already the newest version (8.1.1-2ubuntu0.4).
The following packages were automatically installed and are no longer required:
  gyp libavdevice-ffmpeg56 libjs-inherits libjs-node-uuid libuv1-dev
  linux-headers-4.13.0-37 linux-headers-4.13.0-37-generic
  linux-headers-4.13.0-38 linux-headers-4.13.0-38-generic
  linux-headers-4.13.0-39 linux-headers-4.13.0-39-generic
  linux-headers-4.13.0-41 linux-headers-4.13.0-41-generic
  linux-headers-4.13.0-43 linux-headers-4.13.0-43-generic
  linux-headers-4.13.0-45 linux-headers-4.13.0-45-generic
  linux-headers-4.15.0-29 linux-headers-4.15.0-29-generic
  linux-image-4.13.0-37-generic linux-image-4.13.0-38-generic
  linux-image-4.13.0-39-generic linux-image-4.13.0-41-generic
  linux-image-4.13.0-43-generic linux-image-4.13.0-45-generic
  linux-image-4.15.0-29-generic linux-image-extra-4.13.0-37-generic
  linux-image-extra-4.13.0-38-generic linux-image-extra-4.13.0-39-generic
  linux-image-extra-4.13.0-41-generic linux-image-extra-4.13.0-43-generic
  linux-image-extra-4.13.0-45-generic linux-modules-4.15.0-29-generic
  linux-modules-extra-4.15.0-30-generic linux-signed-image-4.13.0-37-generic
  linux-signed-image-4.13.0-38-generic linux-signed-image-4.13.0-39-generic
  linux-signed-image-4.13.0-41-generic linux-signed-image-4.13.0-43-generic
  linux-signed-image-4.13.0-45-generic
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 236 not upgraded.

但是，当我输入which pip3时，不会得到任何输出。同样，当我输入pip3 -V时，我会得到以下响应：

The program 'pip3' is currently not installed. You can install it by typing:
sudo apt install python3-pip

我尝试了dpkg -L python3-pip，得到了如下输出：

/.
/usr
/usr/lib
/usr/lib/python3
/usr/lib/python3/dist-packages
/usr/lib/python3/dist-packages/pip-8.1.1.egg-info
/usr/lib/python3/dist-packages/pip-8.1.1.egg-info/PKG-INFO
/usr/lib/python3/dist-packages/pip-8.1.1.egg-info/dependency_links.txt
/usr/lib/python3/dist-packages/pip-8.1.1.egg-info/not-zip-safe
/usr/lib/python3/dist-packages/pip-8.1.1.egg-info/requires.txt
/usr/lib/python3/dist-packages/pip-8.1.1.egg-info/entry_points.txt
/usr/lib/python3/dist-packages/pip-8.1.1.egg-info/top_level.txt
/usr/lib/python3/dist-packages/pip
/usr/lib/python3/dist-packages/pip/baseparser.py
/usr/lib/python3/dist-packages/pip/__main__.py
/usr/lib/python3/dist-packages/pip/req
/usr/lib/python3/dist-packages/pip/req/req_set.py
/usr/lib/python3/dist-packages/pip/req/req_install.py
/usr/lib/python3/dist-packages/pip/req/__init__.py
/usr/lib/python3/dist-packages/pip/req/req_file.py
/usr/lib/python3/dist-packages/pip/req/req_uninstall.py
/usr/lib/python3/dist-packages/pip/index.py
/usr/lib/python3/dist-packages/pip/status_codes.py
/usr/lib/python3/dist-packages/pip/utils
/usr/lib/python3/dist-packages/pip/utils/setuptools_build.py
/usr/lib/python3/dist-packages/pip/utils/appdirs.py
/usr/lib/python3/dist-packages/pip/utils/outdated.py
/usr/lib/python3/dist-packages/pip/utils/ui.py
/usr/lib/python3/dist-packages/pip/utils/logging.py
/usr/lib/python3/dist-packages/pip/utils/encoding.py
/usr/lib/python3/dist-packages/pip/utils/deprecation.py
/usr/lib/python3/dist-packages/pip/utils/__init__.py
/usr/lib/python3/dist-packages/pip/utils/filesystem.py
/usr/lib/python3/dist-packages/pip/utils/hashes.py
/usr/lib/python3/dist-packages/pip/utils/build.py
/usr/lib/python3/dist-packages/pip/compat
/usr/lib/python3/dist-packages/pip/compat/dictconfig.py
/usr/lib/python3/dist-packages/pip/compat/__init__.py
/usr/lib/python3/dist-packages/pip/compat/ordereddict.py
/usr/lib/python3/dist-packages/pip/models
/usr/lib/python3/dist-packages/pip/models/index.py
/usr/lib/python3/dist-packages/pip/models/__init__.py
/usr/lib/python3/dist-packages/pip/vcs
/usr/lib/python3/dist-packages/pip/vcs/bazaar.py
/usr/lib/python3/dist-packages/pip/vcs/subversion.py
/usr/lib/python3/dist-packages/pip/vcs/mercurial.py
/usr/lib/python3/dist-packages/pip/vcs/__init__.py
/usr/lib/python3/dist-packages/pip/vcs/git.py
/usr/lib/python3/dist-packages/pip/cmdoptions.py
/usr/lib/python3/dist-packages/pip/basecommand.py
/usr/lib/python3/dist-packages/pip/commands
/usr/lib/python3/dist-packages/pip/commands/completion.py
/usr/lib/python3/dist-packages/pip/commands/install.py
/usr/lib/python3/dist-packages/pip/commands/hash.py
/usr/lib/python3/dist-packages/pip/commands/uninstall.py
/usr/lib/python3/dist-packages/pip/commands/__init__.py
/usr/lib/python3/dist-packages/pip/commands/list.py
/usr/lib/python3/dist-packages/pip/commands/search.py
/usr/lib/python3/dist-packages/pip/commands/show.py
/usr/lib/python3/dist-packages/pip/commands/download.py
/usr/lib/python3/dist-packages/pip/commands/wheel.py
/usr/lib/python3/dist-packages/pip/commands/freeze.py
/usr/lib/python3/dist-packages/pip/commands/help.py
/usr/lib/python3/dist-packages/pip/_vendor
/usr/lib/python3/dist-packages/pip/_vendor/__init__.py
/usr/lib/python3/dist-packages/pip/operations
/usr/lib/python3/dist-packages/pip/operations/__init__.py
/usr/lib/python3/dist-packages/pip/operations/freeze.py
/usr/lib/python3/dist-packages/pip/__init__.py
/usr/lib/python3/dist-packages/pip/locations.py
/usr/lib/python3/dist-packages/pip/pep425tags.py
/usr/lib/python3/dist-packages/pip/exceptions.py
/usr/lib/python3/dist-packages/pip/download.py
/usr/lib/python3/dist-packages/pip/wheel.py
/usr/share
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/pip3.1.gz
/usr/share/doc
/usr/share/doc/python3-pip
/usr/share/doc/python3-pip/copyright
/usr/bin
/usr/bin/pip3
/usr/share/doc/python3-pip/changelog.Debian.gz

这意味着已经安装了pip3。

我如何解决这个问题？

更多细节:我在/usr/local/lib/中安装了python2.7和python 3。python 2.7有以下pip安装：

/usr/local/lib/python2.7/dist-packages/pip
/usr/local/lib/python2.7/dist-packages/pip-10.0.0.dist-info
/usr/local/lib/python2.7/dist-packages/pip-18.0.dist-info

而在/usr/local/lib/python3.5/中没有安装pip3。在python3中只有一个pip安装。

我如何解决这个问题？

Answer 1

试试python3 -m pip3 install pip。

您可能试图使用Python2来运行pip3，这也是您看到错误的原因。