Create a numpay array from key of the following dictionary t =["a" : 23 ,"b" : 72]

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You asked:

“How to create numpy array from the following list of
list ([2,7,2,90] ,[23,4,56,7,65,34])”

>>> import numpy as np
>>> a = np.array(([2,7,2,90] ,[23,4,56,7,65,34]))
>>> print(a)
[list([2, 7, 2, 90]) list([23, 4, 56, 7, 65, 34])]

Is that what you want? If not, you should show us what result you are
expecting.