[Python] How to convert a pandas column that contains numpy arrays to nd array

I have the following dataframe :

df = pd.DataFrame(
{'a':[np.array([1,2,3]),np.array([4,5,6])]
}
)


i want to have a numpy array like following extracted from the a column:

array([[1., 2., 3.],
[4., 5., 6.]])


i can do it like below:

for i, row in df.iterrows():
t_arr[i,:] = row["a"]


but i am looking for a solution without for loop. .values and to_numpy() don't return the desired results

Continue reading...