Changed some files and tf_idf, added data storage, and finish the loop for indexing

This commit is contained in:
inocturnis 2022-05-06 14:58:03 -07:00
parent b833afbfa3
commit c05b4c7b09
3 changed files with 70 additions and 22 deletions

3
.gitignore vendored
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@ -1,2 +1,3 @@
/data/DEV
/data/
*.shelve
/__pycache__/

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@ -14,6 +14,7 @@ import json
import os
import shelve
from bs4 import BeautifulSoup
from time import perf_counter
@ -26,6 +27,9 @@ import numpy as np
import re
#Logging postings
from posting import Posting
class Indexer():
def __init__(self,restart,trimming):
@ -34,7 +38,6 @@ class Indexer():
self.restart = restart
self.trimming = trimming
self.stemmer = PorterStemmer()
self.vectorizer = TfidfVectorizer(lowercase=True,ngram_range = (1,3))
#Shelves for index
#https://www3.nd.edu/~busiforc/handouts/cryptography/letterfrequencies.html
@ -44,7 +47,7 @@ class Indexer():
#Save #2 = EFGHIJK + (2-3)~ 27.1% of words
#Save #3 = LMNOPQ + (4-7) ~ 25.4% of words
#Save #4 = RSTUVWXYZ + (8-9)~ 29.2% of words
#Save #5 = Numbers ???
#Save #5 = Special characters
if os.path.exists("save_1.shelve") and restart:
os.remove("save_1.shelve")
if os.path.exists("save_2.shelve") and restart:
@ -53,34 +56,40 @@ class Indexer():
os.remove("save_3.shelve")
if os.path.exists("save_4.shelve") and restart:
os.remove("save_4.shelve")
if os.path.exists("save_5.shelve") and restart:
os.remove("save_5.shelve")
self.save_1 = shelve.open("save_1.shelve")
self.save_2 = shelve.open("save_2.shelve")
self.save_3 = shelve.open("save_3.shelve")
self.save_4 = shelve.open("save_4.shelve")
self.save_5 = shelve.open("save_5.shelve")
def save_index(self,word,posting):
wordhash = hash(word) ##Honestly do not know why hashing is even needed, might cause more problems
cur_save = get_save(word)
cur_save = self.get_save_file(word)
shelve_list = list()
if wordhash not in cur_save:
shelve_list.append(posting)
cur_save[wordhash] = shelve_list
cur_save.sync()
else:
shelve_list = cur_save[wordhash]
try:
shelve_list = cur_save[word]
shelve_list.append(posting)
tic = perf_counter()
shelve_list.sort(key=lambda x: x.tf_idf, reverse = True)
toc = perf_counter()
if toc - tic > 1 :
print("Took " + str(toc - tic) + "seconds to sort shelve list !")
cur_save.sync()
except:
shelve_list.append(posting)
cur_save[word] = shelve_list
cur_save.sync()
def get_save_file(self,word):
#return the correct save depending on the starting letter of word
word_lower = word.lower()
if re.match(r"^[a-d1-1].*",word_lower):
if re.match(r"^[a-d0-1].*",word_lower):
return self.save_1
elif re.match(r"^[e-k2-3].*",word_lower):
return self.save_2
@ -89,8 +98,10 @@ class Indexer():
elif re.match(r"^[r-z8-9].*",word_lower):
return self.save_4
else:
print(word)
print("You have somehow went beyond the magic")
return None
return self.save_5
# I have a test file (mytest.py) with pandas but couldn't figure out how to grab just a single cell.
# so I came up with this, if anyone knows how to get a single cell and can explain it to
# me I would love to know, as I think that method might be quicker, maybe, idk it like
@ -120,31 +131,66 @@ class Indexer():
#JSON["url"] = url of crawled page, ignore fragments
#JSON["content"] = actual HTML
#JSON["encoding"] = ENCODING
ticker = perf_counter()
tic = perf_counter()
file_load = open(self.path + "/" + directory + "/"+file)
data = json.load(file_load)
soup = BeautifulSoup(data["content"],from_encoding=data["encoding"])
words = word_tokenize(soup.get_text())
toc = perf_counter()
if toc - tic > 1 :
print("Took " + str(toc - tic) + "seconds to tokenize text !")
tokenized_words = list()
stemmed_words = list()
tic = perf_counter()
for word in words:
if word != "" and word.isalnum():
if word != "" and re.fullmatch('[A-Za-z0-9]+',word):
#So all the tokenized words are here,
tokenized_words.append(word)
toc = perf_counter()
if toc - tic > 1 :
print("Took " + str(toc - tic) + "seconds to isalnum text !")
#YOUR CODE HERE
print(tokenized_words)
tic = perf_counter()
for word in tokenized_words:
stemmed_words.append(self.stemmer.stem(word))
print(X)
#stemming,
#tf_idf
#get_tf_idf(stemmed_words,word)
#post = Posting()
toc = perf_counter()
if toc - tic > 1 :
print("Took " + str(toc - tic) + "seconds to stemmed text !")
for word in stemmed_words:
#posting = Posting(data["url"],self.get_tf_idf(list(' '.join(stemmed_words)),word))
tic = perf_counter()
posting = Posting(data["url"],self.tf_idf_raw(stemmed_words,word))
toc = perf_counter()
if toc - tic > 1 :
print("Took " + str(toc - tic) + "seconds to tf_idf text !")
tic = perf_counter()
self.save_index(word,posting)
toc = perf_counter()
if toc - tic > 1 :
print("Took " + str(toc - tic) + "seconds to save text !")
tocker = perf_counter()
print("Finished " + data['url'] + " in \t " + str(tocker-ticker))
def tf_idf_raw(self,words,word):
tf_times = words.count(word)
tf = tf_times/len(words)
return tf
print(stemmed_words)
#
exit(1)

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@ -1,9 +1,10 @@
#Posting class for indexer, will probably be more complex as we keep adding crap to it
class Posting():
def __init(self,url,tf_idf):
def __init__(self,url,tf_idf):
self.url = url
self.tf_idf = tf_idf
def comparator(self):
#Some custom comparator for sorting postings later
pass