小编use*_*655的帖子

我正在编写一个脚本来将一个数字返回给一定数量的有效数字.我需要将浮动转换为列表,以便我可以轻松更改数字.这是我的代码:

def sf(n,x):
    try:
        float(n)
        isnumber = True
    except ValueError:
        isnumber = False
    if isnumber == True:
        n = float(n)
        n = list(n)
        print(n)
    else:
        print("The number you typed isn't a proper number.")
sf(4290,2)

这会返回错误:

Traceback (most recent call last):
File "/Users/jacobgarby/PycharmProjects/untitled/py package/1.py", line 29, in <module>
sf(4290,2)
File "/Users/jacobgarby/PycharmProjects/untitled/py package/1.py", line 25, in sf
n = list(n)
TypeError: 'float' object is not iterable

这个错误意味着什么,我怎么能阻止它发生？