Convert string to nested structures like list

Question

I have a string like

str_sample = \"[[1, 2], [2.0, 0.3], [\'a\', \'b\', [None, (1, 3)], {\'c\': \'d\'}]]\"

I am currently using:

Answer 1

Use eval, but this is not a good practice

eval("[[1, 2], [2.0, 0.3], ['a', 'b']]")
[[1, 2], [2.0, 0.3], ['a', 'b']]