python - 为什么我不能使用 python 虽然它告诉我 python3 已经是最新版本 (3.5.1-3)

Question

我想在我的 ubuntu 中使用 python。当我使用 python 命令时，它告诉我:

dc2-user@10-254-6-144:~$ python
The program 'python' can be found in the following packages:
* python-minimal
* python3
Ask your administrator to install one of them

然后我尝试安装它:

dc2-user@10-254-6-144:~$ sudo apt-get install python3
Reading package lists... Done
Building dependency tree       
Reading state information... Done
python3 is already the newest version (3.5.1-3).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

但是如你所见，我好像已经安装了python3.5然后我卸载它并安装它，通过

sudo apt-get remove python3.5
sudo apt-get install python3.5

但仍然无法使用 python 命令。
一般情况下，我可以在安装后使用python命令。我不知道发生了什么，下一步应该做什么？

Answer 1

Ubuntu 只安装 Python 3，不会添加从 /usr/bin/python3 到 /usr/bin/python 的链接

所以你被迫:

• 使用python3

或

• 自己添加链接或别名或其他基于 shell 的解决方案

引用:

• https://wiki.ubuntu.com/Python/3

引用:

• Python 3 will be the only Python version installed by default.
• Python 3 will be the only Python version in any installation media (i.e. image ISOs)
• Only Python 3 will be allowed on the Ubuntu touch images.
• All upstream libraries that support Python 3 will have their Python 3 version available in the archive.
• All applications that run under Python 3 will use Python 3 by default.
• All system scripts in the archive will use Python 3.

和

• /usr/bin/python will point to Python 3. No, this is not going to happen (unless PEP 394 advocates otherwise, which is doubtful for the foreseeable future). /usr/bin/python and /usr/bin/python2 will point to Python 2.7 and /usr/bin/python3 will point to the latest supported Python 3 version.