check key in dicionary python code example

Example 1: check if is dictionary

isinstance(df, pd.DataFrame)
isinstance(df, dict)
isinstance(df, list)

Example 2: check if a key exists in a dictionary python

d = {"key1": 10, "key2": 23}

if "key1" in d:
    print("this will execute")

if "nonexistent key" in d:
    print("this will not")