how to convert 2d list to 2d native python array not numpy array?

Question

I want to convert python 2d list,

[[1,2,3],[4,5,6]]  

to

python3 array.array type,

[ [1 2 3]

[4 5 6] ]

The most important challenge is I wont import numpy . So I cant use np.asarray() .

I have also used array.fromlist() and array.extend() . Both methods are creating an array of single dimension. But I want to convert multi dimension list to multi dimension array. Is there any way?

Answer 1

What you're asking is not possible. From the array docs :

This module defines an object type which can compactly represent an array of basic values: characters, integers, floating point numbers ... The type is specified at object creation time by using a type code

The only supported types are as follows (notice the absence of list ):

Type code            C Type        Python Type
    'b'         signed char                int
    'B'       unsigned char                int
    'u'          Py_UNICODE  Unicode character
    'h'        signed short                int
    'H'      unsigned short                int
    'i'          signed int                int
    'I'        unsigned int                int
    'l'         signed long                int
    'L'       unsigned long                int
    'q'    signed long long                int
    'Q'  unsigned long long                int
    'f'               float              float
    'd'              double              float 

It seems like you might be confusing the array module, with a native implementation of numpy arrays. This is not the case .