How to check if float pandas column contains only integer numbers?

Question

I have a dataframe

df = pd.DataFrame(data=np.arange(10),columns=[\'v\']).astype(float)

How to make sure that the numbers in v

Answer 1

Here's a simpler, and probably faster, approach:

(df[col] % 1  == 0).all()

To ignore nulls:

(df[col].fillna(-9999) % 1  == 0).all()