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- oceniPoKorisnici = {
- 'Lisa Rose': {'Catch Me If You Can': 3.0, 'Snakes on a Plane': 3.5, 'Superman Returns': 3.5,
- 'You, Me and Dupree': 2.5, 'The Night Listener': 3.0, 'Snitch': 3.0},
- 'Gene Seymour': {'Lady in the Water': 3.0, 'Snakes on a Plane': 3.5, 'Just My Luck': 1.5, 'The Night Listener': 3.0,
- 'You, Me and Dupree': 3.5},
- 'Michael Phillips': {'Catch Me If You Can': 2.5, 'Lady in the Water': 2.5, 'Superman Returns': 3.5,
- 'The Night Listener': 4.0, 'Snitch': 2.0},
- 'Claudia Puig': {'Snakes on a Plane': 3.5, 'Just My Luck': 3.0, 'The Night Listener': 4.5, 'Superman Returns': 4.0,
- 'You, Me and Dupree': 2.5},
- 'Mick LaSalle': {'Lady in the Water': 3.0, 'Snakes on a Plane': 4.0, 'Just My Luck': 2.0, 'Superman Returns': 3.0,
- 'You, Me and Dupree': 2.0},
- 'Jack Matthews': {'Catch Me If You Can': 4.5, 'Lady in the Water': 3.0, 'Snakes on a Plane': 4.0,
- 'The Night Listener': 3.0, 'Superman Returns': 5.0, 'You, Me and Dupree': 3.5, 'Snitch': 4.5},
- 'Toby': {'Snakes on a Plane': 4.5, 'Snitch': 5.0},
- 'Michelle Nichols': {'Just My Luck': 1.0, 'The Night Listener': 4.5, 'You, Me and Dupree': 3.5,
- 'Catch Me If You Can': 2.5, 'Snakes on a Plane': 3.0},
- 'Gary Coleman': {'Lady in the Water': 1.0, 'Catch Me If You Can': 1.5, 'Superman Returns': 1.5,
- 'You, Me and Dupree': 2.0},
- 'Larry': {'Lady in the Water': 3.0, 'Just My Luck': 3.5, 'Snitch': 1.5, 'The Night Listener': 3.5}
- }
- from math import sqrt
- def sim_distance(oceni, person1, person2):
- # Se pravi lista na zaednicki predmeti (filmovi)
- zaednicki={}
- for item in oceni[person1].keys():
- for item in oceni[person2]:
- zaednicki.add(item)
- if len(zaednicki) == 0:
- return 0
- # # Soberi gi kvadratite na zaednickite razliki
- suma = 0.0
- for item in zaednicki:
- ocena1 = oceni[person1][item]
- ocena2 = oceni[person2][item]
- suma += (ocena1 - ocena2) ** 2
- # print(item, person1, ocena1, person2, ocena2)
- result =1 / (1 + sqrt(suma))
- return (round(result,3),len(zaednicki))
- def sim_pearson(oceni, person1, person2):
- # Se kreira recnik vo koj ke se cuvaat predmetite (filmovi) koi se oceneti od dvajcata
- # Vo recnikot ni se vazni samo klucevite za da gi cuvame iminjata na filmovite koi se zaednicki, a vrednostite ne ni se vazni
- zaednicki = {}
- for item in oceni[person1]:
- if item in oceni[person2]:
- zaednicki.add(item)
- # Se presmetuva brojot na predmeti oceneti od dvajcata
- n = len(zaednicki)
- # Ako nemaat zaednicki predmeti vrati korelacija 0
- if n == 0:
- return 0
- # Soberi gi zaednickite oceni (rejtinzi) za sekoja licnost posebno
- sum1 = 0
- sum2 = 0
- # Soberi gi kvadratite od zaednickite oceni (rejtinzi) za sekoja licnost posebno
- sum1Sq = 0
- sum2Sq = 0
- # Soberi gi proizvodite od ocenite na dvete licnosti
- pSum = 0
- for item in zaednicki:
- ocena1 = oceni[person1][item]
- ocena2 = oceni[person2][item]
- sum1 += ocena1
- sum1Sq += ocena1 ** 2
- sum2 += ocena2
- sum2Sq += ocena2 ** 2
- pSum += ocena1 * ocena2
- # Presmetaj go koeficientot na korelacija
- num = pSum - (sum1 * sum2 / n)
- den = sqrt((sum1Sq - pow(sum1, 2) / n) * (sum2Sq - pow(sum2, 2) / n))
- if den == 0:
- return 0
- r = num / den
- return (round(r, 3),n)
- if __name__ == "__main__":
- person1=input()
- person2=input()
- print (sim_pearson(oceniPoKorisnici,person1,person2))
- print (sim_distance(oceniPoKorisnici,person1,person2))
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