将包含字符串的列表转换为浮点会引发值错误：无法将字符串转换为浮点：'22.52.58.246'。 如何转换成浮点数？

Question

I need to convert the strings from a list into float values and append them to a new list.

But I get this error:

ValueError: could not convert string to float: '22.52.58.246'.

How can I convert them into float?

Time = [
    '22.53.13.106',
    '22.53.13.106',
    '22.53.13.161',
    '22.53.13.161',
    '22.53.13.162'
] 

for i in range(0, len(Time)):
    Time[i] = float(Time[i])

Answer 1

22.53.13.106 is not a valid floating point value ^(a) as it appears to have more than one decimal point. They could be IPv4 addresses given no single component is greater than 255 , but you would have to check what's producing them to be sure.

Or, based on the fact that they're called Time , they may well be hh.mm.ss.xxx (xxx = milliseconds), in which case you need to decide first what units you want them in. For example, floating point hours would be something like:

def hh_mm_ss_MMM_to_hours(arg):
    fields = arg.split(".")
    if len(fields) != 4:
        raise RuntimeError("WTF!")
    ret_val =  int(fields[0])
    ret_val += int(fields[1]) / 60
    ret_val += int(fields[2]) / 60 / 60
    ret_val += int(fields[3]) / 60 / 60 / 1000
    return ret_val

Time=['22.53.13.106', '22.53.13.106', '22.53.13.161', '22.53.13.161', '22.53.13.162']
for time in Time:
    print(f"{time} -> {hh_mm_ss_MMM_to_hours(time)}")

That produces:

22.53.13.106 -> 22.88697388888889
22.53.13.106 -> 22.88697388888889
22.53.13.161 -> 22.886989166666666
22.53.13.161 -> 22.886989166666666
22.53.13.162 -> 22.886989444444445

---

^(a) Unless you're one of those strange European types who can't seem to figure out the difference between a decimal point and a comma :-)