Python-具有相同键的集合字典

Question

I'm trying to create a function that will read a text file that has one word on each line, like

afd
asmv
adsasd

It will take words of the user given length and will construct a python dictionary where the key is a string of the word where the letters are sorted. The values will be a set of all words that have the same key. So far I have:

def setdict():
wordfile = argv[1]
open(wordfile, "r")
setdict = {}
for line in wordfile:
    words = line.split()
    for word in words:
        word = word.rstrip("\n")
        if word == wordlength:
            key = str(sorted(word))

I'm a little lost on how to create the sets with words that have the same key and put them in the dictionary. Any help would be appreciated.

Answer 1

collections.defaultdict is useful here:

from collections import defaultdict
from pprint import pprint


words = defaultdict(set)

with open('input.txt') as input_file:
    for line in input_file:
        for word in line.split():
            sorted_list = sorted(word)
            sorted_str = ''.join(sorted_list)
            words[sorted_str].add(word)

pprint(words)

Of course, anything you can do with defaultdict , you can also do with dict.setdefault() :

words = dict()
with open('input.txt') as input_file:
    for line in input_file:
        for word in line.split():
            sorted_list = sorted(word)
            sorted_str = ''.join(sorted_list)
            words.setdefault(sorted_str, set()).add(word)

Answer 2

start with something simple

words = ["hello","python","world"]
my_dict = {}
for word in words:
    try:
       my_dict[sorted(word)].append(word)
    except KeyError:
       my_dict[sorted(word)] = [word]

now instead of using predefined words read them from a file

  words = map(str.split,open("some_word_file.txt"))

Answer 3

the key here is to access the dictionary with a for loop that makes the value set available for manipulation. you can solve your problem by reading the file linewise (readline) and checking the following:

for key, value in my_dict:
    if sorted(word) == key:
        value.append(word)
    else:
        my_dict[sorted(word)] = value