[python list和array 的区别]
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[python list和array 的区别]
本质上是在探讨两种数据类型的不同
- 在计算机里数据结构是怎么存储的,譬如在C++中int x=3,和vector<int> x
两者之间计算机进行了什么处理? - Python 中数据存储的过程和c++中的一样吗?python 中x=np.array([2,1,2])中和c++中声明的一样吗?
- 在学习两种类型转换的方法时,应该多考虑在什么时候和背景下用到转换?
- list:中保存的是数据的存放的地址,即指针,并非数据。
array() 是 numpy 包中的一个函数,所以才会有np.array()这种写法,array 里的元素都是同一类型。
x=np.array([[0,1,2,3],'abcd']) print(type(x)) ''' 输出 ''' [list([0, 1, 2, 3]) 'abcd'] <class 'numpy.ndarray'>
为什么还是可以执行成功,并且type(x)为numpy.ndarray,type(x[0])<class 'list'>,type(x[1])为<class 'str'>,说法存在问题。
转换
` a = np.array([2,3])
b = a.tolist()`` a = [2, 3]
b = np.array(a)`
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