我正在研究Python及其matplotlib庫，如何創建以下圖表，以便第一個切片從頂部開始并向右(順時針)而不是向左(逆時針)移動：

代碼：import matplotlib.pyplot as plt

import re

import math

# The slices will be ordered and plotted counter-clockwise if startangle=90.

sizes = [175, 50, 25, 50]

total = sum(sizes)

print('TOTAL:')

print(total)

print('')

percentages = list(map(lambda x: str((x/(total * 1.00)) * 100) + '%', sizes))

print('PERCENTAGES:')

print(percentages)

backToFloat = list(map(lambda x: float(re.sub("%$", "", x)), percentages))

print('')

print('PERCENTAGES BACK TO FLOAT:')

print(backToFloat)

print('')

print('SUM OF PERCENTAGES')

print(str(sum(backToFloat)))

print('')

labels = percentages

colors = ['blue', 'red', 'green', 'orange']

patches, texts = plt.pie(sizes, colors=colors, startangle=-270)

plt.legend(patches, labels, loc="best")

# Set aspect ratio to be equal so that pie is drawn as a circle.

plt.axis('equal')

plt.tight_layout()

plt.show()

總結

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