Error trying to install kivy on Python 3.8

Question

I'm trying to install kivy but everytime I attempt to install I end up with this massive error:

    WARNING: A problem occurred while running pkg-config --libs --cflags sdl2 SDL2_ttf SDL2_image SDL2_mixer (code 1)

    b"'pkg-config' is not recognized as an internal or external command,\r\noperable program or batch file.\r\n"

    ERROR: Dependency for context.pyx not resolved: config.pxi
    ERROR: Dependency for compiler.pyx not resolved: config.pxi
    ERROR: Dependency for context_instructions.pyx not resolved: config.pxi
    ERROR: Dependency for fbo.pyx not resolved: config.pxi
    ERROR: Dependency for gl_instructions.pyx not resolved: config.pxi
    ERROR: Dependency for instructions.pyx not resolved: config.pxi
    ERROR: Dependency for opengl.pyx not resolved: config.pxi
    ERROR: Dependency for opengl_utils.pyx not resolved: config.pxi
    ERROR: Dependency for shader.pyx not resolved: config.pxi
    ERROR: Dependency for stencil_instructions.pyx not resolved: config.pxi
    ERROR: Dependency for scissor_instructions.pyx not resolved: config.pxi
    ERROR: Dependency for texture.pyx not resolved: config.pxi
    ERROR: Dependency for vbo.pyx not resolved: config.pxi
    ERROR: Dependency for vertex.pyx not resolved: config.pxi
    ERROR: Dependency for vertex_instructions.pyx not resolved: config.pxi
    ERROR: Dependency for cgl.pyx not resolved: config.pxi
    ERROR: Dependency for cgl_mock.pyx not resolved: config.pxi
    ERROR: Dependency for cgl_gl.pyx not resolved: config.pxi
    ERROR: Dependency for cgl_glew.pyx not resolved: config.pxi
    ERROR: Dependency for cgl_sdl2.pyx not resolved: config.pxi
    ERROR: Dependency for svg.pyx not resolved: config.pxi
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

Answer 1

remove kivvy and try installing it using apt

pip uninstall kivy    
sudo apt install python3-kivy

other explanation can be found on kivy's documentation.

Answer 2

https://github.com/kivy/kivy/issues/6563#issuecomment-560039155

pip install kivy[base] kivy_examples --pre --extra-index-url https://kivy.org/downloads/simple/.