>>> from holidays import holidays

>>> lt1 = ['Greece\n', 'J. Smith-double-9-Santorini-Mykonos-Rhodes\n', 'A. Jones-single-8-Athens-Mykonos-Rhodes-Mycenae\n', 'B. Garcia-double-12-Santorini-Athens-Mykonos-Rhodes-Ephesus-Mycenae\n', 'J. Clark-single-9-Athens-Rhodes-Ephesus-Mycenae-Thessaloniki\n']
>>> with open('greece.txt', 'w') as f1:
...    f1.writelines(lt1)
>>> dextra_gr = {'Santorini': 90, 'Athens': 100, 'Mykonos': 85, 'Mycenae': 110,
...            'Rhodes': 120, 'Ephesus': 115, 'Thessaloniki': 75}
>>> holidays('greece.txt', dextra_gr, 106, 'gr_bills.txt')
>>> with open('gr_bills.txt', 'r') as g1:
...    out1 = g1.read()
>>> out1
'J. Smith: 1249€\nA. Jones: 1432€\nB. Garcia: 1892€\nJ. Clark: 1664€\n'

>>> lt1 = ['Italy\n',
...        'J. Puig-double-10-Rome-Florence-Pisa-Siena\n', 
...        'A. Biden-single-15-Rome-Florence-Portofino\n', 
...        'E. Mebarak-double-14-Rome-Naples-Capri\n', 
...        'R. Silloni-double-21-Rome-Naples-Amalfi-Capri\n', 
...        'T. Lopez-single-18-Rome-Florence-Pisa-Portofino\n', 
...        'G. Kasparov-single-9-Rome-Naples-Capri-Pompeii\n', 
...        'S. Watson-double-9-Rome-Florence-Pisa-Siena-San Gimignano\n', 
...        'D. Trumpet-double-12-Rome-Naples-Pompeii-Ercolano-Vesuvius\n', 
...        'M. Holmes-single-8-Rome-Naples-Vesuvius\n', 
...        'G. Casademunt-double-20-Rome-Florence-Pisa-Siena-Portofino\n']

>>> with open('italy.txt', 'w') as f2:
...    f2.writelines(lt1)
>>> dextra_it = {'Rome': 90, 'Florence': 150, 'Pisa': 120, 'Siena': 130,
...              'Portofino': 180, 'San Gimignano': 125,
...              'Naples': 120, 'Amalfi': 150, 'Capri': 130, 'Pompeii': 140,
...              'Ercolano': 145, 'Vesuvius': 155}
>>> holidays('italy.txt', dextra_it, 123, 'it_bills.txt')
>>> with open('it_bills.txt', 'r') as g2:
...    for line in g2:
...        line
'J. Puig: 1720€\n'
'A. Biden: 2634€\n'
'E. Mebarak: 2062€\n'
'R. Silloni: 3073€\n'
'T. Lopez: 3196€\n'
'G. Kasparov: 1808€\n'
'S. Watson: 1722€\n'
'D. Trumpet: 2126€\n'
'M. Holmes: 1545€\n'
'G. Casademunt: 3130€\n'