https://luvris2.tistory.com/119
์ค์น๋ ์ ๋ธ๋ก๊ทธ๋ฅผ ์ฐธ์กฐํ๋ค
# ๊ทธ๋ํ์ ํ๊ธ ๋์ค๊ฒ ํ๋ ์ฝ๋
import platform
import matplotlib.pyplot as plt
from matplotlib import font_manager, rc
plt.rcParams['axes.unicode_minus'] = False
if platform.system() == 'Linux':
rc('font', family='NanumGothic')