check dataframe for inf code example

Example 1: python check if is pandas dataframe

import pandas as pd
isinstance(df, pd.DataFrame)

Example 2: pandas dataframe replace inf

df.replace([np.inf, -np.inf], np.nan)

Example 3: check if dataframe contains infinity

df.replace([np.inf, -np.inf], np.nan).dropna(subset=["col1", "col2"], how="all")