图例只需调用一次，否则将显示7个不同的图例。我在下面展示了一个例子。请注意，您必须将自己的数据替换为ax.pie()：data1 = (10,90) # some data to be plotted

data2 = (40,50)

data3 = (70,30)

labels = ['Sending Data', 'Not Sending Data'] #legend labels to be plotted

colors = ['green', 'red']

fig = plt.figure(figsize=(16,8))

ax1 = plt.subplot2grid((2,4),(0,0))

ax1.pie(data1, colors=colors, startangle=90)

plt.title('LOGS1')

ax2 = plt.subplot2grid((2, 4), (0, 1))

ax2.pie(data2, colors=colors, startangle=90)

plt.title('LOGS2')

ax3 = plt.subplot2grid((2, 4), (0, 2))

ax3.pie(data3, colors=colors, startangle=90)

plt.title('LOGS3')

ax4 = plt.subplot2grid((2, 4), (0, 3))

ax4.pie(data1, colors=colors, startangle=90)

plt.title('LOGS4')

ax5 = plt.subplot2grid((2, 4), (1, 0))

ax5.pie(data2, colors=colors, startangle=90)

plt.title('LOGS5')

ax6 = plt.subplot2grid((2, 4), (1, 1))

ax6.pie(data3, colors=colors, startangle=90)

plt.title('LOGS6')

ax7 = plt.subplot2grid((2, 4), (1, 2))

patches, texts = ax7.pie(data1, colors=colors, startangle=90) #use this plot to show the legend

plt.title('LOGS7')

plt.legend(patches, labels, bbox_to_anchor=(2.3, 2), prop={'size':14}) #show the legend defined in labels

#change values of 'bbox_to_anchor' to move the legend to the desired location

plt.axis('equal') # Set aspect ratio to be equal so that pie is drawn as a circle.

plt.tight_layout()

plt.subplots_adjust(right=0.94) #adjust the spacing on right to see legend clearly

plt.show()

这将生成以下图形：