Dataset1

import pandas as pd

def calculateTemperature(data, temperature):
    new_temp = []
    for index, item in dataset.iterrows():
        result = item['Air Temperature (C°)'] - float(input)
        if result >= 0:
            new_temp.append(result)
        else:
            new_temp.append(0)
    dataset['CDD'] = new_temp
    dataset.to_excel('output.xlsx')

def printDate(data):
    for row in data.head().iterrows():
        print(row[0].day_name(), row[0].day, row[0].month_name(), row[0].year)

def dates(data):
    months = []
    years = []
    for row in data.iterrows():
        if row[0].month_name() not in months:
            months.append(row[0].month_name())
    for row in data.iterrows():
        if row[0].year not in years:
            years.append(row[0].year)
    months.append(months.pop(months.index('December')))

    print(months)
    print(years)

if __name__ == "__main__":
    dataset = pd.read_excel('test.xlsx', index_col=0, engine='openpyxl')
    # temperatureInput = eval(input("Enter a temperature value (0-100): "))
    # calculateTemperature(dataset, temperatureInput)
    # printDate(dataset)
    dates(dataset)