str = "[123, 345, 567]"
arr1 = eval(str)
arr2 = str[1..-2].split(',').collect! {|n| n.to_i}
print(arr1, " ", arr1.class, " - ", arr2, " ", arr2.class)
c3RyID0gIlsxMjMsIDM0NSwgNTY3XSIKCmFycjEgPSBldmFsKHN0cikKYXJyMiA9IHN0clsxLi4tMl0uc3BsaXQoJywnKS5jb2xsZWN0ISB7fG58IG4udG9faX0KCnByaW50KGFycjEsICIgIiwgYXJyMS5jbGFzcywgIiAtICIsIGFycjIsICIgIiwgYXJyMi5jbGFzcykK