readme: change python version in README.md instructions to python3

Ubuntu still maps python and python-dev to Python 2, so the explicit python3 is needed.

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rdb 2020-06-25 18:47:41 +02:00
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@ -100,7 +100,7 @@ for you to install, depending on your distribution).
The following command illustrates how to build Panda3D with some common The following command illustrates how to build Panda3D with some common
options: options:
```bash ```bash
python makepanda/makepanda.py --everything --installer --no-egl --no-gles --no-gles2 --no-opencv python3 makepanda/makepanda.py --everything --installer --no-egl --no-gles --no-gles2 --no-opencv
``` ```
You will probably see some warnings saying that it's unable to find several You will probably see some warnings saying that it's unable to find several
@ -113,7 +113,7 @@ If you are on Ubuntu, this command should cover the most frequently
used third-party packages: used third-party packages:
```bash ```bash
sudo apt-get install build-essential pkg-config fakeroot python-dev libpng-dev libjpeg-dev libtiff-dev zlib1g-dev libssl-dev libx11-dev libgl1-mesa-dev libxrandr-dev libxxf86dga-dev libxcursor-dev bison flex libfreetype6-dev libvorbis-dev libeigen3-dev libopenal-dev libode-dev libbullet-dev nvidia-cg-toolkit libgtk2.0-dev libassimp-dev libopenexr-dev sudo apt-get install build-essential pkg-config fakeroot python3-dev libpng-dev libjpeg-dev libtiff-dev zlib1g-dev libssl-dev libx11-dev libgl1-mesa-dev libxrandr-dev libxxf86dga-dev libxcursor-dev bison flex libfreetype6-dev libvorbis-dev libeigen3-dev libopenal-dev libode-dev libbullet-dev nvidia-cg-toolkit libgtk2.0-dev libassimp-dev libopenexr-dev
``` ```
Once Panda3D has built, you can either install the .deb or .rpm package that Once Panda3D has built, you can either install the .deb or .rpm package that