🌟Data Science code example - 21: How to insert a new column based on condition in Python?

## How to insert a new column based on condition in Python
def Kickstarter_Example_80():
    print()
    print(format('How to insert a new column based on condition in Python','*^82'))
    import warnings
    warnings.filterwarnings("ignore")
    # load libraries
    import pandas as pd
    import numpy as np
    # Create an example dataframe
    raw_data = {'student_name': ['Miller', 'Jacobson', 'Bali', 'Milner', 'Cooze', 'Jacon', 'Ryaner', 'Sone', 'Sloan', 'Piger', 'Riani', 'Ali'],
                'test_score': [76, 88, 84, 67, 53, 96, 64, 91, 77, 73, 52, np.NaN]}
    df = pd.DataFrame(raw_data, columns = ['student_name', 'test_score'])
    print(); print(df)
    # Create a function to assign letter grades
    grades = ........
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