我有三个文件是用户。
users.dat
1::F::1::10::48067
1::F::1::10::48067
1::F::1::10::48067
1::F::1::10::48067
1::F::1::10::48067
1::F::1::10::48067
1::F::1::10::48067
1::F::1::10::48067
等级.dat
1::1193::5::978300760
1::661::3::978302109
1::914::3::978301968
1::3408::4::978300275
1::2355::5::978824291
1::1197::3::978302268
1::1287::5::978302039
1::2804::5::978300719
movied.dat
1193::One Flew Over the Cuckoo's Nest (1975)::Drama
661::James and the Giant Peach (1996)::Animation|Children's|Musical
914::My Fair Lady (1964)::Musical|Romance
3408::Erin Brockovich (2000)::Drama
2355::Bug's Life, A (1998)::Animation|Children's|Comedy
1197::Princess Bride, The (1987)::Action|Adventure|Comedy|Romance
1287::Ben-Hur (1959)::Action|Adventure|Drama
2804::Christmas Story, A (1983)::Comedy|Drama
我的预期输出
1::1193::5::978300760::F::1::10::48067::One Flew Over the Cuckoo's Nest::Drama::1975
1::661::3::978302109::F::1::10::48067::James and the Giant Peach::Animation|Children's|Musical::1996
1::914::3::978301968::F::1::10::48067::My Fair Lady ::Musical|Romance::1964
1::3408::4::978300275::F::1::10::48067::Erin Brockovich ::Drama::2000
1::2355::5::978824291::F::1::10::48067::Bug's Life, A ::Animation|Children's|Comedy::1998
我试图在不使用熊猫的情况下合并这些文件。我创建了三个词典。用户ID是通用密钥。然后,我尝试使用用户键合并这三个文件。但是,我并没有使自己想要的东西合并。任何建议和建议将不胜感激
我的代码
import json
file = open("users.dat","r",encoding = 'utf-8')
users={}
for line in file:
x = line.split('::')
user_id=x[0]
gender=x[1]
age=x[2]
occupation=x[3]
i_zip=x[4]
users[user_id]=gender,age,occupation,i_zip.strip()
file = open("movies.dat","r",encoding='latin-1')
movies={}
for line in file:
x = line.split('::')
movie_id=x[0]
title=x[1]
genre=x[2]
movies[movie_id]=title,genre.strip()
file = open("ratings.dat","r")
ratings={}
for line in file:
x = line.split('::')
a=x[0]
b=x[1]
c=x[2]
d=x[3]
ratings[a]=b,c,d.strip()
newdict = {}
newdict.update(users)
newdict.update(movies)
newdict.update(ratings)
for i in users.keys():
addition = users[i] + movies[i]+ratings[i]
newdict[i] = addition
with open('data.txt', 'w') as outfile:
json.dump(newdict, outfile)
我像这样的输出
{"1": ["F", "1", "10", "48067", "Toy Story (1995)", "Animation|Children's|Comedy", "1246", "4", "978302091"], "2": ["M", "56", "16", "70072", "Jumanji (1995)", "Adventure|Children's|Fantasy", "1247", "5", "978298652"],
您的代码中的第一个错误(除了混乱的凹痕之外(是,您将用户ID的评分从用户ID作为钥匙中算出:
:ratings[a]=b,c,d.strip()
对于您的数据集,字典ratings
最终将以Value { '1': ('2804', '5', '978300719') }
出现。因此,除一个评级外,所有的评级都将丢失,因为您只有一个用户。
您想做的是将评分数据视为列表,而不是字典。您要实现的结果也是评分的扩展版本,因为您最终会像得分一样多。
。其次,您不需要json
模块,因为您所需的输出不采用JSON格式。
这是一个完成工作的代码:
#!/usr/bin/env python3
# Part 1: collect data from the files
users = {}
file = open("users.dat","r",encoding = 'utf-8')
for line in file:
user_id, gender, age, occupation, i_zip = line.rstrip().split('::')
users[user_id] = (gender, age, occupation, i_zip)
movies={}
file = open("movies.dat","r",encoding='latin-1')
for line in file:
movie_id, title, genre = line.rstrip().split('::')
# Parse year from title
title = title.rstrip()
year = 'N/A'
if title[-1]==')' and '(' in title:
short_title, in_parenthesis = title.rsplit('(', 1)
in_parenthesis = in_parenthesis.rstrip(')').rstrip()
if in_parenthesis.isdigit() and len(in_parenthesis)==4:
# Text in parenthesis has four digits - it must be year
title = short_title.rstrip()
year = in_parenthesis
movies[movie_id] = (title, genre, year)
ratings=[]
file = open("ratings.dat","r")
for line in file:
user_id, movie_id, score, dt = line.rstrip().split('::')
ratings.append((user_id, movie_id, score, dt))
# Part 2: save the output
file = open('output.dat','w',encoding='utf-8')
for user_id, movie_id, score, dt in ratings:
# Get user data from dictionary
gender, age, occupation, i_zip = users[user_id]
# Get movie data from dictionary
title, genre, year = movies[movie_id]
# Merge data into a single string
row = '::'.join([user_id, movie_id, score, dt,
gender, age, occupation, i_zip,
title, genre, year])
# Write to the file
file.write(row + 'n')
file.close()
第1部分是基于您的代码,我将评分保存到列表(不是字典(的主要区别,并且我添加了几年的解析。
第2部分是保存输出的地方。
运行脚本后output.dat
文件的内容:
1::1193::5::978300760::F::1::10::48067::One Flew Over the Cuckoo's Nest::Drama::1975
1::661::3::978302109::F::1::10::48067::James and the Giant Peach::Animation|Children's|Musical::1996
1::914::3::978301968::F::1::10::48067::My Fair Lady::Musical|Romance::1964
1::3408::4::978300275::F::1::10::48067::Erin Brockovich::Drama::2000
1::2355::5::978824291::F::1::10::48067::Bug's Life, A::Animation|Children's|Comedy::1998
1::1197::3::978302268::F::1::10::48067::Princess Bride, The::Action|Adventure|Comedy|Romance::1987
1::1287::5::978302039::F::1::10::48067::Ben-Hur::Action|Adventure|Drama::1959
1::2804::5::978300719::F::1::10::48067::Christmas Story, A::Comedy|Drama::1983