Below is your python code :

import pandas as pd

def readmyfile():
    # reading csv file
    result = pd.read_csv('data.csv')
    dates = [] # list to store elements in first column
    colors = [] # list to store elements in last column
    # iterating over first and last column
    for i in range(result.shape[0]):
        dates.append(result.iloc[i,0])
        colors.append(result.iloc[i,-1])
    # returning both lists
    return dates,colors

def writetofile(output_file,dates,colors):
        # writing first row title
        output_file.write("Dates\tColors\n")
        # writing the two lists to the txt file
        for i in range(len(dates)):
            line = str(dates[i])+"\t"+str(colors[i])+"\n"
            output_file.write(line)

if __name__ == '__main__':
    dates,colors = readmyfile()
    # opening the txt file
    file1 = open("Dates_Colors.txt","w")
    writetofile(file1,dates,colors)
    file1.close()