如何将字符串数转换为列表中的整数？

Question

I have a list say:

['batting average', '306', 'ERA', '1710']

How can I convert the intended numbers without touching the strings?

Thank you for the help.

Answer 1

changed_list = [int(f) if f.isdigit() else f for f in original_list]

Answer 2

The data looks like you would know in which positions the numbers are supposed to be. In this case it's probably better to explicitly convert the data at these positions instead of just converting anything that looks like a number:

ls = ['batting average', '306', 'ERA', '1710']
ls[1] = int(ls[1])
ls[3] = int(ls[3])

Answer 3

Try this:

def convert( someList ):
    for item in someList:
        try:
            yield int(item)
        except ValueError:
            yield item

newList= list( convert( oldList ) )

Answer 4

a= ['batting average', '306', 'ERA', '1710.5']

[f if sum([c.isalpha() for c in f]) else float(f) for f in a ]

if your list contains float, string and int (as pointed about by @d.putto in the comment)