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法律研究判断 Python 中的某个类是否为第二个类的子类
若要在 Python 中判断某个类是否为第二个类的子类，请使用 numpy.issubclass_() 方法。第 1 个参数是输入类。如果 arg1 是 arg2 的子类，则返回 True。第 2 个参数是输入类。如果是类元组，则当 arg1 是其中任何元组元素的子类时返回 True。issubclass_ 等效于 Python 内置 issubclass，不同之处在于，如果任何参数不是类，它则返回 False，而不引发 TypeError。
步骤
首先，导入必要的库 -
import numpy as np
在 Numpy 中使用 issubclass_() 方法。检查某个类是否为第二个类的子类 -
print("Result...",np.issubclass_(np.float16, np.float32))
print("Result...",np.issubclass_(np.int32, np.signedinteger))
print("Result...",np.issubclass_('i4', np.signedinteger))
print("Result...",np.issubclass_(np.int64, int))
print("Result...",np.issubclass_(np.float64, float))
print("Result...",np.issubclass_('S8', str))
print("Result...",np.issubclass_(np.int16, float))
print("Result...",np.issubclass_(np.array([45, 89]), int))
print("Result...",np.issubclass_(np.int32, np.integer))示例
import numpy as np
# To determine if a class is a subclass of a second class, use the numpy.issubclass_() method in Python numpy
# The 1st argument is the input class. True is returned if arg1 is a subclass of arg2.
# The 2nd argument is the input class. If a tuple of classes, True is returned if arg1 is a subclass of any of the tuple elements.
# The issubclass_ is equivalent to the Python built-in issubclass,
# except that it returns False instead of raising a TypeError if one of the arguments is not a class.
print("Using the issubclass_() method in Numpy\n")
# Checking whether a class is a subclass of a second class
print("Result...",np.issubclass_(np.float16, np.float32))
print("Result...",np.issubclass_(np.int32, np.signedinteger))
print("Result...",np.issubclass_('i4', np.signedinteger))
print("Result...",np.issubclass_(np.int64, int))
print("Result...",np.issubclass_(np.float64, float))
print("Result...",np.issubclass_('S8', str))
print("Result...",np.issubclass_(np.int16, float))
print("Result...",np.issubclass_(np.array([45, 89]), int))
print("Result...",np.issubclass_(np.int32, np.integer))输出
Using the issubclass_() method in Numpy Result... False Result... True Result... False Result... False Result... True Result... False Result... False Result... False Result... True
更新于： 2022 年 2 月 25 日
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