How to check the data in the csv file is a string or number or alphanumeric in python?

Question

I am learning data analysis using Python. I am successfully able to read the data and print the data of a csv file using Python. My mentor gave me a task to find out whether the data that is displaying is

• a string,
• a number, or
• alphanumeric.

Answer 1

To check whether a variable v is a string, or number, you may look at the following:

>>> v = 'test'
>>> isinstance(v, str)
True

Or

>>> t = 2
>>> isinstance(p, int)
True

Now if it is a string and you want to check more precisely the content of that string (alpha, alphanumerical, digit, etc.) you can use the built-in python methods:

• str.isalnum
• str.isalpha
• str.isdigit
• ...

Now try:

>>> v.isalnum()
True
>>> v.isalpha()
True
>>> v.isdigit()
False
>>> v.islower()
False

Answer 2

FileName['ColumnName'][0].isdigit()

This will Check whether the First Value of the Specified Column is Digit or Not. From this, we can easily infer if it's a digit or not(Can even check for strings also)