import pandas as pd

# Create a DataFrame
df = pd.DataFrame({'A': [1, 2, 3, 4]})

# Create a new column using pd.Series()
values = pd.Series([5, 10, 15, 20]) # Create series
df['B'] = values # Add series to data frame as a column

# Print data frame
print(df)

>>>

   A   B
0  1   5
1  2  10
2  3  15
3  4  20