我是Matploblib和Numpy的新手，在尝试提取数据时遇到过问题。以下代码将导致IndexError：布尔索引与沿着维度0的索引数组不匹配;维度是32，但对应的布尔维度是112。请指教！！
使用的数据集：https://data.gov.sg/dataset/monthly-motor-vehicle-population-by-type-of-fuel-used

import numpy as np
import matplotlib.pyplot as plt
title = "motor-vehicle-population-statistics-by-type-of-fuel-used."
titlelen = len(title)
print("{:*^{titlelen}}".format(title, titlelen=titlelen+6))
print()
data = np.genfromtxt("data/motor-vehicle-population-statistics-by-type-of-fuel-used.csv",
                      dtype=("datetime64[Y]","U100","U110",int),
                      delimiter=",",
                      names=True)

years = np.unique(data["month"])
category = np.unique(data['category'])
type = np.unique(data['type'])

cars = data[data["category"]=="Cars"]["number"]
carspetrol = cars[data["type"]=="Petrol"]["number"]
# print(cars)
print(carspetrol)

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