The Series object can be created from a DataFrame using the squeeze() Method.
Series is a one-dimensional labeled representation of a single column DataFrame.
Example
>>> df = DataFrame("admissions_train")
>>> gpa = df.select(["gpa"])
>>> gpa.squeeze()
0 4.00
1 2.33
2 3.46
3 3.83
4 4.00
5 2.65
6 3.57
7 3.44
8 3.85
9 3.95
Name: gpa, dtype: float64