问题描述:
Write a function to convert all possible convertible elements in the list to float.

测试用例:
['assert list_to_float( [("3", "4"), ("1", "26.45"), ("7.32", "8"), ("4", "8")] ) == \'[(3.0, 4.0), (1.0, 26.45), (7.32, 8.0), (4.0, 8.0)]\'', 'assert list_to_float( [("4", "4"), ("2", "27"), ("4.12", "9"), ("7", "11")] ) == \'[(4.0, 4.0), (2.0, 27.0), (4.12, 9.0), (7.0, 11.0)]\'', 'assert list_to_float( [("6", "78"), ("5", "26.45"), ("1.33", "4"), ("82", "13")] ) == \'[(6.0, 78.0), (5.0, 26.45), (1.33, 4.0), (82.0, 13.0)]\'']

生成的代码:
def list_to_float(lst):
    result = []
    for tup in lst:
        converted_tup = tuple(float(x) for x in tup)
        result.append(converted_tup)
    return result