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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def make_country_nationality_list(cts, ct_file):
 """Combine list of countries and list of nationalities"""

    countries = pd.read_csv(ct_file)
    nationality = dict(zip(countries.nationality,countries.alpha_3_code))
    both_codes = {**nationality, **cts}
    return both_codes