QCombobox finData 方法总是 returns -1 with numpy array
QCombobox finData method always returns -1 with numpy array
当使用 numpy 数组添加项目时，我在尝试获取组合框中某些数据的索引时遇到问题，而如果我使用列表，则结果是预期的。
from PySide2 import QtWidgets
import numpy as np
app = QtWidgets.QApplication()
heights_list = [0.52, 1, 2, 3, 4, 12.57, 14.97]
heights_array = np.array([0.52, 1, 2, 3, 4, 12.57, 14.97])
combo_list = QtWidgets.QComboBox()
for height in heights_list:
combo_list.addItem(f"{height:.2f} m", height)
combo_array = QtWidgets.QComboBox()
for height in heights_array:
combo_array.addItem(f"{height:.2f} m", height)
print(combo_list.findData(14.97)) # Print 6
print(combo_array.findData(14.97)) # Print -1
存储指针的 findData() method uses the model's match() method, and the match method uses the QVariants for comparison. For its part PySide2(also PyQt5) to have compatibility does PyObject conversions (which is the representation of a python object in C/C++) to basic types such as int, float, etc. but it does not know how to convert a numpy object and then it only stores the pointer, and when comparing QVariant 它比较内存地址，但作为 2 个不同的对象，它总是 return 它们不是同一个对象。
当使用 numpy 数组添加项目时，我在尝试获取组合框中某些数据的索引时遇到问题，而如果我使用列表，则结果是预期的。
from PySide2 import QtWidgets
import numpy as np
app = QtWidgets.QApplication()
heights_list = [0.52, 1, 2, 3, 4, 12.57, 14.97]
heights_array = np.array([0.52, 1, 2, 3, 4, 12.57, 14.97])
combo_list = QtWidgets.QComboBox()
for height in heights_list:
combo_list.addItem(f"{height:.2f} m", height)
combo_array = QtWidgets.QComboBox()
for height in heights_array:
combo_array.addItem(f"{height:.2f} m", height)
print(combo_list.findData(14.97)) # Print 6
print(combo_array.findData(14.97)) # Print -1
存储指针的 findData() method uses the model's match() method, and the match method uses the QVariants for comparison. For its part PySide2(also PyQt5) to have compatibility does PyObject conversions (which is the representation of a python object in C/C++) to basic types such as int, float, etc. but it does not know how to convert a numpy object and then it only stores the pointer, and when comparing QVariant 它比较内存地址，但作为 2 个不同的对象，它总是 return 它们不是同一个对象。