#範例2-6：圓餅圖（plt.pie）顯示春夏秋冬四季的業績%
import matplotlib.pyplot as plt
mydata = [25000,50000,35000,20000]
mylabel = ['spring','summer','fall','winter']
myexplode = [0, 0.1, 0, 0]
mycolor = ['green','red','yellow','lightblue']
plt.pie(mydata,explode=myexplode,labels=mylabel,colors=mycolor,autopct='%3.1f%%', pctdistance=0.6, shadow = True, labeldistance= 1.1)
plt.axis('equal')
plt.legend()
plt.show()

#說明：
# 指定圓餅圖的顏色：colors = mycolor,           
# 分類的標記：labels = mylabels,	
# 四捨五入至小數點後面位數：autopct = "%3.1f%%",      
# 設定分隔的區塊項目是否凸出（不凸出為0）：explode = myexplode,      
# 數值顯示位置與圓餅圖的圓心距離：pctdistance = 0.6,      
# 圓餅圖的半徑，預設是1：radius = 0.7,     
# 圓餅圖的圓心座標：center = (-10,0), 
# 是否使用陰影：shadow = True     
#項目標題與圓心的距離是半徑的幾倍：labeldistance= 1.1