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spell_checker.py
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spell_checker.py
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## 0926
## week1 assignment spell checker by claire
import re
from collections import Counter
import streamlit as st
def words(text): return re.findall(r"[^\d\W]+\'*[^\d\W]+", text.lower())
## match all words without numbers
## include ' if there's any
WORDS = Counter(words(open('big.txt').read()))
def P(word, N=sum(WORDS.values())):
"Probability of `word`."
return WORDS[word] / N
def correction(word):
"Most probable spelling correction for word."
return max(candidates(word), key=P)
def candidates(word):
"Generate possible spelling corrections for word."
return (known([word]) | known(edits1(word)) or known(edits2(word)) or [word])
def known(words):
"The subset of `words` that appear in the dictionary of WORDS."
return set(w for w in words if w in WORDS)
def edits1(word):
"All edits that are one edit away from `word`."
letters = "abcdefghijklmnopqrstuvwxyz'"
splits = [(word[:i], word[i:]) for i in range(len(word) + 1)]
deletes = [L + R[1:] for L, R in splits if R]
transposes = [L + R[1] + R[0] + R[2:] for L, R in splits if len(R)>1]
replaces = [L + c + R[1:] for L, R in splits if R for c in letters]
inserts = [L + c + R for L, R in splits for c in letters]
return set(deletes + transposes + replaces + inserts)
def edits2(word):
"All edits that are two edits away from `word`."
return (e2 for e1 in edits1(word) for e2 in edits1(e1))
## Evaluation
#### spelltest(Testset(open('spell-testset1.txt'))) # Development set
## App
st.title("Spell Checker Demo")
origin = st.sidebar.checkbox("Show original word", value=False, key=None, help=None)
input1 = ""
input1 = st.selectbox("Choose a word", ['love','happy', 'teecher'])
input2 = ""
input2 = st.text_input("Key in a word:")
test_input = ""
if (input1 != ""):
test_input = input1
if (input2 != ""):
test_input = input2
if (test_input != ""):
if (origin):
st.text(correction(test_input))
if (test_input == correction(test_input)):
st.success("Correct!", icon="✅")
st.balloons()
test_input = ""
input2 = ""
input1 = ""
else:
st.error("Wrong", icon="🚨")
test_input = ""
input2 = ""
input1 = ""