python - 在 python3 中使用 pip(或 pip3)安装包

Question

Ubuntu 14.04

我是 python 的新手，我在安装包时遇到了问题。我看过与我类似的问题，但很难判断它是否相关且是否最新。

我不确定我需要做什么才能让它发挥作用。

pip --version
The program 'pip' is currently not installed. You can install it by typing: 
sudo apt-get install python-pip


pip3 --version
pip 1.5.4 from /usr/lib/python3/dist-packages (python 3.4)

我有几个版本的 python，最新的；

python3
Python 3.4.3 (default, Oct 14 2015, 20:28:29) 
[GCC 4.8.4] on linux

当我尝试安装一个包时

pip3 install copy
Downloading/unpacking copy
Could not find any downloads that satisfy the requirement copy
Cleaning up...
No distributions at all found for copy
Storing debug log for failure in /home/ben/.pip/pip.log

我在类似的 stackoverflow 问题中看到，人们也去了日志并发布了它。

------------------------------------------------------------
/usr/bin/pip3 run on Thu Aug 18 20:25:27 2016
Downloading/unpacking copy
Getting page https://pypi.python.org/simple/copy/
Could not fetch URL https://pypi.python.org/simple/copy/: 404 Client             Error: Not Found
Will skip URL https://pypi.python.org/simple/copy/ when looking for    download links for copy
Getting page https://pypi.python.org/simple/
URLs to search for versions for copy:
* https://pypi.python.org/simple/copy/
Getting page https://pypi.python.org/simple/copy/
Could not fetch URL https://pypi.python.org/simple/copy/: 404 Client  Error: Not Found
Will skip URL https://pypi.python.org/simple/copy/ when looking for  download links for copy
Could not find any downloads that satisfy the requirement copy
Cleaning up...
Removing temporary dir /tmp/pip_build_ben...
No distributions at all found for copy
Exception information:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 122, in  main
status = self.run(options, args)
File "/usr/lib/python3/dist-packages/pip/commands/install.py", line  278, in run
requirement_set.prepare_files(finder, force_root_egg_info=self.bundle,   bundle=self.bundle)
File "/usr/lib/python3/dist-packages/pip/req.py", line 1178, in  prepare_files
url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
File "/usr/lib/python3/dist-packages/pip/index.py", line 277, in  find_requirement
raise DistributionNotFound('No distributions at all found for %s' % req)
pip.exceptions.DistributionNotFound: No distributions at all found for   copy

其他答案是这样说的 “您需要通过 HTTPS 而不是 HTTP 获取 pypi。”但我真的不明白，或者我需要做些什么来解决这个问题。

所以我的问题是；我需要做什么才能安装包的 python3 版本？我需要安装 pip 还是使用 pip3 更好？

Answer 1

如果您有多个版本的 python，请确保导航到您要使用的 python 版本的目录，转到“脚本”文件夹并在那里运行 pip 命令。希望这有效。