pandas check for inf code example

Example 1: python check if is pandas dataframe

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

Example 2: check if dataframe contains infinity

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

Example 3: pandas dataframe replace inf

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

Example 4: check if value is in series pandas

In [21]: s.unique()
Out[21]: array(['a', 'b', 'c'], dtype=object)

In [22]: 'a' in s.unique()
Out[22]: True