turn double square brackets to single

Question

How can I remove the double square brackets of a numpy array to single square brackets like a list?

[[0, 3.49, 0, 4.55]]

desired output

[0,3.49,0,4.55]

I have searched through SO looking for numpy array to list , square brackets numpy, not being able to find an answer

to_list() only add commas among the values

Answer 1

如果它们被编码为列表，则只需使用[0]元素

Answer 2

Are you sure it was a numpy array?

I think just use

my_list[0] 

to get the first element (in the first element is [0,3.49,0,4.55] )