Error with "len() of unsized object"

Question

Here's my code: ``` TestV = int(input("Data: ")) print TestV print len (TestV) ``` In fact, it prints `TestV` but when I try to get its length it gives me the error `"len() of unsized object"` I've try something easier like ``` >>> x = "hola" >>> print len(x) 4 ``` and it works perfectly. Can anyone explain to me what am I doing wrong?

Accepted Answer

If you want to count the number of digits, you need to convert it back to a String (note that the minus sign (`-`) will count as one as well):

```
len(str(TestV))
```

Or simply wait with converting it to an int:

```
TestV = input("Data: ")
print len (TestV)
TestV = int(TestV)
```

Note however than in the latter case, it will count tailing spaces, etc. as well.

EDIT: based on your comment.

The reason is that strings containing other characters are likely not to be numbers, but an error in the process. In case you want to filter out the number, you can use a regex:

```
import re

x = input("Data: ")
x = re.sub("\D", "", x)
xv = int(x)
```

Error with "len() of unsized object"

Solution

Problem