如何在 ubuntu 20.04 上安装 python3-pip

Question

我在 PC 上安装了 Ubuntu 20.04。然后我尝试开始并为python3安装pip。然而，似乎没有任何效果。这是我迄今为止尝试过的：

sudo apt install python3-pip

这是我得到的错误：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package python3-pip is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'python3-pip' has no installation candidate

我已经尝试了 Carlos Sanchez JR 提出的解决方案： How to install Python package installer PIP on Ubuntu 20.04 Linux

按照上面链接中给出的建议后，我在执行sudo apt update以下操作时遇到此错误：

Ign:1 cdrom://Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423) focal InRelease
Hit:2 cdrom://Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423) focal Release
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease              
Hit:6 http://archive.ubuntu.com/ubuntu focal InRelease                        
Get:5 http://kali.download/kali kali-rolling InRelease [30.5 kB]
Hit:7 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Err:5 http://kali.download/kali kali-rolling InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
Get:8 http://kali.cs.nctu.edu.tw/kali kali-rolling InRelease [30.5 kB]
Err:8 http://kali.cs.nctu.edu.tw/kali kali-rolling InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
Reading package lists... Done
W: GPG error: http://kali.download/kali kali-rolling InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
E: The repository 'http://http.kali.org/kali kali-rolling InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://kali.cs.nctu.edu.tw/kali kali-rolling InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6
E: The repository 'http://kali.cs.nctu.edu.tw/kali kali-rolling InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

sudo apt install python3-pip在这一点上尝试只会给我E: Package 'python3-pip' has no installation candidate和以前一样的错误。

我没有找到解决这个问题的其他方法。

Answer 1

试试这个命令

sudo apt-get install python3-pip

注意：如果您是全新安装，则需要在尝试上述命令之前先执行此操作。

sudo apt-get update

Answer 2

这意味着您进行了全新安装。

尝试这个：

sudo apt-get update 

然后只需使用下面的命令，就可以正常工作了。

sudo apt-get install python3-setuptools
sudo python3 -m easy_install install pip
python3 -m pip --version

Answer 3

尝试以下命令：

sudo apt-get install python3-setuptools
sudo python3 -m easy_install install pip
python3 -m pip --version

Answer 4

您需要启用 Universe 存储库才能安装官方包。

$ sudo add-apt-repository universe
$ sudo apt-get install python3-pip