isdigit 为整数返回 false

问题描述

我正在打开一个文件 'testFile' 并以逗号分隔它。 到目前为止，一切都很好。 一行中的第二个值是“30”，该行是“This is a, 30, test”我可以验证它是否正确拆分，因为我可以打印parts[1]并打印“30”，但为什么会重复。当此值为 30 时 isd??igit() 返回 false？

with open('testFile') as fp:
    for line in fp:
        parts = line.split( ',' )

        repeats = parts[1]
        print repeats.isdigit()
        print parts[1]

You could use re.split. it can split on mult tokens.
import re
with open('data') as f:
    for line in f:
        # split on white space and commas
        line = re.split(r'[ ,]',line)
        # re.split leaves some empty strings, so remove them
        line = [el for el in line if el]
        print(line)
        print(line[3].isdigit())

['This', 'is', 'a', '30', 'test']

True