中秋节到了，祝大家中秋节快乐！用 Python 画个月饼，给大家助助兴。

效果图

依赖项

pip install numpy
pip install matplotlib

源代码

需要下载字体文件 Alibaba-PuHuiTi-Medium.ttf，回复「月饼」获取。

from numpy import sin, cos, pi
import matplotlib.pyplot as pltfrom matplotlib.patches import Arc, Circle, Wedge
from matplotlib.font_manager import FontPropertieslength = 20
R = 3**0.5*length/(3**0.5*cos(pi/12)-sin(pi/12))
r = 2*sin(pi/12)*R/3**0.5arc1 = Arc([0, length], width=2*r, height=2*r,angle=0, theta1=30, theta2=150, ec='orange', linewidth=4)  ##ec为线条颜色，可以自由替换arc2 = Arc([-length/2, length/2*3**0.5], width=2*r, height=2*r,angle=0, theta1=60, theta2=180, ec='orange', linewidth=4)
arc3 = Arc([-length/2*3**0.5, length/2], width=2*r, height=2*r,angle=0, theta1=90, theta2=210, ec='orange', linewidth=4)
arc4 = Arc([-length, 0], width=2*r, height=2*r, angle=0, theta1=120, theta2=240, ec='orange', linewidth=4)
arc5 = Arc([-length/2*3**0.5, -length/2], width=2*r, height=2*r,angle=0, theta1=150, theta2=270, ec='orange', linewidth=4)
arc6 = Arc([-length/2, -length/2*3**0.5], width=2*r, height=2*r,angle=0, theta1=180, theta2=300, ec='orange', linewidth=4)
arc7 = Arc([0, -length], width=2*r, height=2*r, angle=0, theta1=210, theta2=330, ec='orange', linewidth=4)
arc8 = Arc([length/2, -length/2*3**0.5], width=2*r, height=2*r,angle=0, theta1=240, theta2=360, ec='orange', linewidth=4)
arc9 = Arc([length/2*3**0.5, -length/2], width=2*r, height=2*r,angle=0, theta1=270, theta2=390, ec='orange', linewidth=4)
arc10 = Arc([length, 0], width=2*r, height=2*r, angle=0, theta1=300, theta2=420, ec='orange', linewidth=4)
arc11 = Arc([length/2*3**0.5, length/2], width=2*r, height=2*r,angle=0, theta1=330, theta2=450, ec='orange', linewidth=4)
arc12 = Arc([length/2, length/2*3**0.5], width=2*r, height=2*r,angle=0, theta1=0, theta2=120, ec='orange', linewidth=4)circle = Circle((0,0), R, ec='orange', fc='white', linewidth=4) ##ec为线条颜色，fc为填充颜色,可以自由替换wedge1 = Wedge([-2, 2], R-5, 90, 180,ec='orange', fc=r'white', linewidth=4) ##ec为线条颜色，fc为填充颜色,可以自由替换wedge2 = Wedge([-5, 5], R-12, 90, 180, ec='orange',fc=r'white', linewidth=4)
wedge3 = Wedge([-2, -2], R-5, 180, 270, ec='orange',fc=r'white', linewidth=4)
wedge4 = Wedge([-5, -5], R-12, 180, 270, ec='orange',fc=r'white', linewidth=4)
wedge5 = Wedge([2, -2], R-5, 270, 360, ec='orange',fc=r'white', linewidth=4)
wedge6 = Wedge([5, -5], R-12, 270, 360, ec='orange',fc=r'white', linewidth=4)
wedge7 = Wedge([2, 2], R-5, 0, 90, ec='orange',fc=r'white', linewidth=4)
wedge8 = Wedge([5, 5], R-12, 0, 90, ec='orange',fc=r'white', linewidth=4)art_list = [arc1, arc2, arc3, arc4, arc5, arc6, arc7, arc8, arc9, arc10, arc11, arc12]
art_list.extend([circle, wedge1, wedge2, wedge3, wedge4, wedge5, wedge6, wedge7, wedge8])
fig, ax = plt.subplots(figsize=(8, 8))
ax.set_aspect('equal')
for a in art_list:ax.add_patch(a)plt.axis('off')
font_set = FontProperties(fname=r"Alibaba-PuHuiTi-Medium.ttf", size=12)  ##可以自由下载字体使用
plt.text(-15.5, -2.5, '中秋快乐', bbox=dict(boxstyle='square', fc="w", ec='orange', linewidth=4), fontproperties=font_set,fontsize=50,color='orange')  ##ec为线条颜色，color为字体颜色,可以自由替换
plt.text(-25, -33, '但愿人长久，千里共婵娟', fontproperties=font_set, fontsize=30, color='#aa4a30')
plt.ylim([-35, 35])
plt.xlim([-35, 35])plt.show()

最后

画图其实就是各种数学计算、圆形曲线的计算。如果想看更多月饼的画法，公众号「Python七号」回复「月饼」。