python畫圓運(yùn)用了matplotlb庫的figure()和Circle()函數(shù)；其中，figure()函數(shù)用于確定畫布大小，而Circle()函數(shù)用于配置圓的相關(guān)信息，進(jìn)而畫圓。

本教程操作環(huán)境：windows7系統(tǒng)、Python3版、Dell G3電腦。

python畫圓代碼

from matplotlib.patches import Ellipse, Circle import matplotlib.pyplot as plt   def plot_cicle():     fig = plt.figure()     ax = fig.add_subplot(111)       cir1 = Circle(xy = (0.0, 0.0), radius=2, alpha=0.5)     ax.add_patch(cir1)       x, y = 0, 0     ax.plot(x, y, 'ro')       plt.axis('scaled')     plt.axis('equal')   #changes limits of x or y axis so that equal increments of x and y have the same length       plt.show()    plot_cicle()