What is the python syntax to tell if a string only contains numbers?

Question

I think this should be fairly simple but can't seem to figure it out.

I just need the python syntax to find if a string contains only numbers.

so it would find: '8888' or '1' or '126928428'

but not: 'Test' or 'Test8'

I searching for it in a for loop that is pulling info off a webpage with BeautifulSoup.

<td>203.195.237.158</td><td>8888</td><td>CN</td><td>China</td><td>Socks5</td>

Basically I am trying to pull the ip and port out of a long string of these.

You needd to use the [str.isdigit](https://docs.python.org/2/library/stdtypes.html#str.isdigit) method ex. `'126928428'.isdigit()` — Abhijit, Sep 05 '14 at 18:40
Ahhhhh str.isdigit. Thanks that's what I was looking for. I kept think int but that wouldn't work because it is a sting. Thanks — RabidGorilla, Sep 05 '14 at 18:43

score 4 · Answer 1 · answered Sep 05 '14 at 18:40

4

str.isdigit tests if the string is composed only of characters from '0123456789':

In [35]: 'Test'.isdigit()
Out[35]: False

In [36]: '8888'.isdigit()
Out[36]: True

In [37]: 'Test8'.isdigit()
Out[37]: False

answered Sep 05 '14 at 18:40

unutbu

1 Answers1