I can't compile "benchmark.py"

[ynntech]

I can't compile "benchmark.py".
When I try following command, I got some error.
$python benchmark.py

File "benchmark.py", line 2, in <module> import matplotlib.pyplot as plt File "~/.pyenv/versions/3.7.0/lib/python3.7/site-packages/matplotlib/pyplot.py", line 2374, in <module> switch_backend(rcParams["backend"]) File "~/.pyenv/versions/3.7.0/lib/python3.7/site-packages/matplotlib/pyplot.py", line 207, in switch_backend backend_mod = importlib.import_module(backend_name) File "~/.pyenv/versions/3.7.0/lib/python3.7/importlib/__init__.py", line 127, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "~/.pyenv/versions/3.7.0/lib/python3.7/site-packages/matplotlib/backends/backend_macosx.py", line 14, in <module> from matplotlib.backends import _macosx ImportError: Python is not installed as a framework. The Mac OS X backend will not be able to function correctly if Python is not installed as a framework. See the Python documentation for more information on installing Python as a framework on Mac OS X. Please either reinstall Python as a framework, or try one of the other backends. If you are using (Ana)Conda please install python.app and replace the use of 'python' with 'pythonw'. See 'Working with Matplotlib on OSX' in the Matplotlib FAQ for more information.

[ynntech]

I solved this problem.
First, you can check the directory by following cmd.
$ python -c "import matplotlib;print(matplotlib.matplotlib_fname())"

move to the directry(using $cd ~).
then,
edit "matplotlibrc" file like below.
backend : macosx -> backend : Tkagg

Finally, I can compile benchmark.py .