在virtualenv中安装wx python

我的系统正在运行UbuntuMate 16.04

我已经安装了python2.7,并且正在virtualenv中运行python3.5

在这两种情况下,wx.version()返回

3.0.2.0 gtk2 (classic)

我想使用wx.adv.DatePickerCtrl,但无法导入wx.adv模块

我想我需要从经典升级到wx凤凰。不幸的是,我不明白怎么做。我已按照 here ,在virtualenv中使用以下命令

 pip install -U \
      -f https://extras.wxpython.org/wxPython4/extras/linux/gtk2/ubuntu-16.04 \
   wxPython

这会产生以下错误:

 Found existing installation: wxPython 3.0.2.0
 Cannot uninstall 'wxPython'. 
 It is a distutils installed project and thus we cannot 
 accurately determine which files belong to it which would 
 lead to only a partial uninstall.

我曾试图找到升级wxPython的方法,但这似乎是一个网络沉默的话题