Python3-venv没有安装ubuntu 14.04

全新安装ubuntu gnome 14.04,然后进行dist-upgrade

我尝试做的第一件事就是为python创建虚拟环境

python3 -m venv flask 

给我

 The virtual environment was not created successfully because ensurepip is not available. On Debian/Ubuntu systems, you need to install the python3-venv package using the following command. apt-get install python3-venv You may need to use sudo with that command. After installing the python3-venv package, recreate your virtual environment. 

这很奇怪,因为我认为默认安装了venv,但无论如何

 sudo apt-get install python3-venv 

给我

 E: Unable to locate package python3-venv 

我错过了什么吗? 我的python安装有问题吗? 我试图谷歌是否有一个回购或我需要的东西,但我找不到。

做:

 sudo apt-get install python3.4-venv 

然后你可以轻松地做到:

 python3 -m venv flask 

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