问题描述:
Write a function to convert a given string to a tuple.

测试用例:
['assert string_to_tuple("python 3.0")==(\'p\', \'y\', \'t\', \'h\', \'o\', \'n\', \'3\', \'.\', \'0\')', 'assert string_to_tuple("item1")==(\'i\', \'t\', \'e\', \'m\', \'1\')', 'assert string_to_tuple("15.10")==(\'1\', \'5\', \'.\', \'1\', \'0\')']

生成的代码:
def string_to_tuple(s):
    return tuple(s)

# Test cases
assert string_to_tuple("python 3.0") == ('p', 'y', 't', 'h', 'o', 'n', '3', '.', '0')
assert string_to_tuple("item1") == ('i', 't', 'e', 'm', '1')
assert string_to_tuple("15.10") == ('1', '5', '.', '1', '0')