which version of wxWidgets is used?

I download, build and install wxPhoenix_dev with a pip-command like
this on Ubuntu-like GNU/Linux:

    sudo pip3 install -U --pre \
        -f http://wxpython.org/Phoenix/snapshot-builds/ \
        wxPython_Phoenix

The question is, which version of wxWidgets is used here? Does it
download a compiled binary or does it compile it itself? Where does it
get the sources (github)? Which version is used?

Is there a way to ask with Python, which version of wxWidgets is used?

    python -c "import wx;print(wx.version())"

This command only shows me the version of wxPython/wxPhoenix but not
the unerlying wxWidgets version.
How can I get that?

···

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And where is wxWidgets on my Ubuntu-system after that
build-install-process with pip?

I can find wx.h but no libwxbase with 'locate'.
Shouldn't it somewhere on my system?

I want to use the by-wxPhoenix-used wxWidgets version for my own C++
applications. I don't want to install Ubuntu-packages for that with a
different wx-version.

···

On 2015-11-01 21:35 <c.buhtz@posteo.jp> wrote:

    sudo pip3 install -U --pre \
        -f Index of /Phoenix/snapshot-builds \
        wxPython_Phoenix

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