The nan is a constant that indicates that the given value is not legal – Not a Number . … In Python, we have the isnan() function, which can check for nan values. And this function is available in two modules- NumPy and math . The isna() function in the pandas module can also check for nan values.

Is Python a NaN or none?

nan is IEEE 754 floating point representation of Not a Number (NaN), which is of Python build-in numeric type float. However, None is of NoneType and is an object. For comparison purposes, numpy.

How does Python deal with NaN?

If there is a certain row with missing data, then you can delete the entire row with all the features in that row. axis=1 is used to drop the column with `NaN` values. axis=0 is used to drop the row with `NaN` values.