def get_touchdowns(df):
    
    """
    Get the total number of touchdowns for a player in a given week.
    
    Input:
        - Dataframe
    Output:
        - Dataframe with a new column representing total touchdowns"""
    
    TD_sum = df['ReceivingTouchdowns'] + df['RushingTouchdowns'] + df['PassingTouchdowns']
    df['TotalTouchdowns'] = TD_sum
    
    return df