How to verify whether string value is in correct range in Data Frame in Python Pandas?

I have DataFrame in Python pandas like below ("col1" is data type string):

col1
-------
14212614414
05261265140
82044114467
...

• Fifth and sixth values mean day of born.

How to check whether day are from the correct range, so fifth and sixth values should be from range 1 to 31.

col1        | col2
------------|-------
14212614414 | True
05261265140 | True
82044114467 | False
...

How can Ido that in Python Pandas?

>Solution :

You can use the series.str accessor and slice the string, then treat it as an int with astype and check if it’s between the numbers

df['col2']=df['col1'].str[4:6].astype(int).between(1,31)


col1    col2
0   14212614414 True
1   5261265140  True
2   82044114467 False