How do you create a data-frame from NoneType?

Question

I'm currently using the ffn library to analyze stock data. However, while using one of the functions to get information I've gotten back an object I can't manipulate.

While trying to turn the object back into a pandas data frame i get the error: Invalid file path or buffer object type: <class 'NoneType'>

Is there anyway to read this data type back into pandas?

Answer 1

From the python docs: https://docs.python.org/3/library/constants.html

None The sole value of the type NoneType . None is frequently used to represent the absence of a value, as when default arguments are not passed to a function. Assignments to None are illegal and raise a SyntaxError.

If you put nothing (the absence of value) inside of DataFrame the DataFrame would be empty. NoneType means that the object is equal to the singleton None.

So to create a DataFrame from NoneType you could test for None and if the result is True create an empty DataFrame.

import pandas as pd
if result is None:
    df = pd.DataFrame()

But probably thats not what you want. More likely the problem is in your acquisition of the object in the first place. There is no information in that NoneType object.