matplotlib 실행 시 한글 깨짐 오류 메시지---------------------------------------------------------------------------------------------------------------------------------findfont: Font family ['san-serif'] not found. Falling back to DejaVu Sans./home/user/.local/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 51064 missing from current font.font.set_text(s, 0.0, flag..