check if pandas series doesnt have code example

Example 1: pandas check if series

type(x) is pd.DataFrame		# NO
type(x) == pd.DataFrame		# NO
isinstance(x, pd.DataFrame) # YES

Example 2: 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