AttributeError: 'NoneType' object has no attribute '_fields' code example

Example 1: AttributeError: 'NoneType' object has no attribute 'dropna'

import pandas as pd
file = pd.read_csv("/my/path/to/spreadsheet.csv", index_col=0)
file.dropna(how="any", inplace=True)
file = file.fillna("", inplace=False)
print(file)

Example 2: Pandas AttributeError: 'NoneType' object has no attribute 'head

print(data.head())
    # data = df.dropna(how='any', thresh=None)
data = data.dropna(subset = ["IPs"], inplace=True)