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March 21, 2021 07:13
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import re | |
from collections import Counter | |
from sklearn.model_selection import train_test_split | |
from sklearn.metrics import accuracy_score | |
from sklearn.svm import SVC | |
from sklearn.svm import LinearSVC | |
from sklearn.ensemble import RandomForestClassifier | |
from sklearn.tree import DecisionTreeClassifier | |
import streamlit as st | |
st.write("# Text Emotions Prediction") | |
t1 = st.text_input("Enter any text>>: ") | |
def read_data(file): | |
data = [] | |
with open(file, 'r')as f: | |
for line in f: | |
line = line.strip() | |
label = ' '.join(line[1:line.find("]")].strip().split()) | |
text = line[line.find("]")+1:].strip() | |
data.append([label, text]) | |
return data | |
file = 'text.txt' | |
data = read_data(file) | |
print("Number of instances: {}".format(len(data))) | |
def ngram(token, n): | |
output = [] | |
for i in range(n-1, len(token)): | |
ngram = ' '.join(token[i-n+1:i+1]) | |
output.append(ngram) | |
return output | |
def create_feature(text, nrange=(1, 1)): | |
text_features = [] | |
text = text.lower() | |
text_alphanum = re.sub('[^a-z0-9#]', ' ', text) | |
for n in range(nrange[0], nrange[1]+1): | |
text_features += ngram(text_alphanum.split(), n) | |
text_punc = re.sub('[a-z0-9]', ' ', text) | |
text_features += ngram(text_punc.split(), 1) | |
return Counter(text_features) | |
print(create_feature("I love you!")) | |
print(create_feature(" aly wins the gold!!!")) | |
print(create_feature(" aly wins the gold!!!!!", (1, 2))) | |
def convert_label(item, name): | |
items = list(map(float, item.split())) | |
label = "" | |
for idx in range(len(items)): | |
if items[idx] == 1: | |
label += name[idx] + " " | |
return label.strip() | |
emotions = ["joy", 'fear', "anger", "sadness", "disgust", "shame", "guilt"] | |
X_all = [] | |
y_all = [] | |
for label, text in data: | |
y_all.append(convert_label(label, emotions)) | |
X_all.append(create_feature(text, nrange=(1, 4))) | |
print("features example: ") | |
print(X_all[0]) | |
print("Label example:") | |
print(y_all[0]) | |
X_train, X_test, y_train, y_test = train_test_split(X_all, y_all, test_size = 0.2, random_state = 123) | |
def train_test(clf, X_train, X_test, y_train, y_test): | |
clf.fit(X_train, y_train) | |
train_acc = accuracy_score(y_train, clf.predict(X_train)) | |
test_acc = accuracy_score(y_test, clf.predict(X_test)) | |
return train_acc, test_acc | |
from sklearn.feature_extraction import DictVectorizer | |
vectorizer = DictVectorizer(sparse = True) | |
X_train = vectorizer.fit_transform(X_train) | |
X_test = vectorizer.transform(X_test) | |
# Classifiers | |
svc = SVC() | |
lsvc = LinearSVC(random_state=123) | |
rforest = RandomForestClassifier(random_state=123) | |
dtree = DecisionTreeClassifier() | |
clifs = [svc, lsvc, rforest, dtree] | |
# train and test them | |
print("| {:25} | {} | {} |".format("Classifier", "Training Accuracy", "Test Accuracy")) | |
print("| {} | {} | {} |".format("-"*25, "-"*17, "-"*13)) | |
for clf in clifs: | |
clf_name = clf.__class__.__name__ | |
train_acc, test_acc = train_test(clf, X_train, X_test, y_train, y_test) | |
print("| {:25} | {:17.7f} | {:13.7f} |".format(clf_name, train_acc, test_acc)) | |
l = ["joy", 'fear', "anger", "sadness", "disgust", "shame", "guilt"] | |
l.sort() | |
label_freq = {} | |
for label, _ in data: | |
label_freq[label] = label_freq.get(label, 0) + 1 | |
# print the labels and their counts in sorted order | |
for l in sorted(label_freq, key=label_freq.get, reverse=True): | |
print("{:10}({}) {}".format(convert_label(l, emotions), l, label_freq[l])) | |
emoji_dict = {"joy":"😂", "fear":"😱", "anger":"😠", "sadness":"😢", "disgust":"😒", "shame":"😳", "guilt":"😳"} | |
texts = [t1] | |
for text in texts: | |
features = create_feature(text, nrange=(1, 4)) | |
features = vectorizer.transform(features) | |
prediction = clf.predict(features)[0] | |
st.write(emoji_dict[prediction]) |
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