我正在编写一个模糊搜索应用程序，即使单词有错误也能在文本中查找单词。我写了gui表格但由于计算量很大而冻结了。所以我创建了继承自QThread的类，并将信号从它发送到gui，以便进度条开始工作，gui形式不再冻结。但我也应该创建这个应用程序的控制台版本，我不需要gui表单，但我需要在QThread继承的类中编写的方法。但是如果没有使用在控制台版本中使用的奇怪的PyQT库，那是不可能的。所以我不知道如何解决这个问题。我的老师建议使用线程，但是我没有找到如何从QThread中的colud那样从Thread类发出信号。
这是一个QThread类
import text_methods
from PyQt5.QtCore import pyqtSignal, QThread
class FuzzySearch(QThread):
sig_words_count = pyqtSignal(int)
sig_step = pyqtSignal(int)
sig_done = pyqtSignal(bool)
sig_insertions = pyqtSignal(str)
sig_insertions_indexes = pyqtSignal(list)
def __init__(self, text, words, case_sensitive):
super().__init__()
self.text = text
self.words = words
self.case_sensitive = case_sensitive
self.insertions_indexes = {}
self.text_dict = {}
def run(self):
self.get_insertions_info(self.text, self.words)
def find_insertions_of_word(self, word, word_number):
word_insertions = {}
for textword in self.text_dict.keys():
if text_methods.is_optimal_distance(word, textword):
word_insertions[textword] = self.text_dict[textword]
for index in self.text_dict[textword]:
self.insertions_indexes[index] = index + len(textword)
self.sig_step.emit(word_number)
return word_insertions
'''Get information about insertions of words in the text'''
def find_insertions(self, text, words):
word_number = 1
insertions = {}
self.text_dict = text_methods.transform_text_to_dict(text, self.case_sensitive)
words_list = text_methods.transform_words_to_list(words, self.case_sensitive)
self.sig_words_count.emit(len(words_list))
for word in words_list:
print(word_number)
insertions[word] = self.find_insertions_of_word(word, word_number)
word_number += 1
self.insertions_indexes = sorted(self.insertions_indexes.items())
return insertions
'''Get information about insertions of words in the text in special format'''
def get_insertions_info(self, text, words):
insertions = self.find_insertions(text, words)
insertions_info = ''
for word in insertions.keys():
insertions_info += 'Вы искали слово "' + word + '"\n'
if len(insertions[word]) == 0:
insertions_info += ' По этому запросу не было найдено слов\n'
else:
insertions_info += ' По этому запросу были найдены слова:\n'
for textword in insertions[word].keys():
insertions_info += ' "' + textword + '" на позициях: '
insertions_info += ", ".join([str(i) for i in insertions[word][textword]])
insertions_info += '\n'
self.sig_done.emit(True)
self.sig_insertions.emit(insertions_info)
self.sig_insertions_indexes.emit(self.insertions_indexes)
self.quit()
如你所见，有很多发出的信号我转移到gui模块，它们连接到方法find_insertions中的类FindButton中的插槽：
from PyQt5.QtWidgets import QHBoxLayout, QVBoxLayout, QApplication, QWidget,\
QLabel, QPushButton, QTextEdit, QFileDialog,\
QMessageBox, QProgressBar, QCheckBox
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QFont
from fuzzysearch import FuzzySearch
import sys
class OpenButton(QPushButton):
def __init__(self, name, font, textedit):
super().__init__(name, font=font)
self.textedit = textedit
self.clicked.connect(self.open_dialog)
def open_dialog(self):
fname = QFileDialog.getOpenFileName(self, 'Open file', '/home')
if fname[0]:
with open(fname[0], 'r') as f:
data = f.read()
self.textedit.setText(data)
class FindButton(QPushButton):
def __init__(self, name, font, text, words, result, window):
super().__init__(name, font=font)
self.window = window
self.textedit = text
self.wordsedit = words
self.resultedit = result
self.checkbox = window.case_sensitive_checkbox
self.clicked.connect(self.find_insertions)
def find_insertions(self):
text = self.textedit.toPlainText()
words = self.wordsedit.toPlainText()
if text == '':
QMessageBox.information(self, 'Нет текста',
'Текст не был введен. \nВведите текст.')
elif words == '':
QMessageBox.information(self, 'Нет слов',
'Слова не были введены. \nВведите слова через запятую.')
else:
self.setDisabled(True)
self.text_editor = TextEditor(text, self.textedit)
self.fuzzy_search = FuzzySearch(text, words, self.checkbox.checkState())
self.fuzzy_search.sig_words_count.connect(self.window.progress_bar.setMaximum)
self.fuzzy_search.sig_step.connect(self.window.progress_bar.setValue)
self.fuzzy_search.sig_done.connect(self.setEnabled)
self.fuzzy_search.sig_insertions.connect(self.resultedit.setText)
self.fuzzy_search.sig_insertions_indexes.connect(self.text_editor.mark)
self.fuzzy_search.start()
class TextEditor:
def __init__(self, text, textedit):
self.text = text
self.textedit = textedit
def mark(self, to_mark):
self.textedit.clear()
current_index = 0
for item in to_mark:
self.write_not_marked_text(self.text[current_index:item[0]])
self.write_marked_text(self.text[item[0]:item[1]])
current_index = item[1]
self.write_not_marked_text(self.text[current_index:])
def write_not_marked_text(self, text):
font = QFont("Times", 10)
font.setItalic(False)
font.setBold(False)
self.textedit.setCurrentFont(font)
self.textedit.setTextColor(Qt.black)
self.textedit.insertPlainText(text)
def write_marked_text(self, text):
font = QFont("Times", 10)
font.setItalic(True)
font.setBold(True)
self.textedit.setCurrentFont(font)
self.textedit.setTextColor(Qt.red)
self.textedit.insertPlainText(text)
class Window(QWidget):
def __init__(self, font):
super().__init__()
self.standard_font = font
self.text_edit_font = QFont("Times", 10)
text_label = QLabel("Введите или откройте текст",
font=self.standard_font)
words_label = QLabel("Введите или откройте слова (через запятую)",
font=self.standard_font)
result_label = QLabel("Результат",
font=self.standard_font)
text_edit = QTextEdit(font=self.text_edit_font)
words_edit = QTextEdit(font=self.text_edit_font)
result_edit = QTextEdit(font=self.text_edit_font)
self.case_sensitive_checkbox = QCheckBox('Учитывать регистр')
self.case_sensitive_checkbox.setFont(self.standard_font)
self.progress_bar = QProgressBar()
self.progress_bar.setValue(0)
open_btn1 = OpenButton("Открыть", self.standard_font, text_edit)
open_btn2 = OpenButton("Открыть", self.standard_font, words_edit)
find_btn = FindButton("Найти слова в тексте", self.standard_font,
text_edit, words_edit, result_edit, self)
text_label_box = QHBoxLayout()
text_label_box.addWidget(text_label, alignment=Qt.AlignLeft)
text_label_box.addWidget(open_btn1, alignment=Qt.AlignRight)
words_label_box = QHBoxLayout()
words_label_box.addWidget(words_label, alignment=Qt.AlignLeft)
words_label_box.addWidget(open_btn2, alignment=Qt.AlignRight)
words_box = QVBoxLayout()
words_box.addLayout(words_label_box)
words_box.addWidget(words_edit)
result_box = QVBoxLayout()
result_box.addWidget(result_label, alignment=Qt.AlignLeft)
result_box.addWidget(result_edit)
bottom_box = QHBoxLayout()
bottom_box.addLayout(words_box)
bottom_box.addLayout(result_box)
find_and_progress_box = QHBoxLayout()
find_and_progress_box.addWidget(find_btn, alignment=Qt.AlignLeft)
find_and_progress_box.addWidget(self.case_sensitive_checkbox)
find_and_progress_box.addWidget(self.progress_bar)
main_box = QVBoxLayout()
main_box.addLayout(text_label_box)
main_box.addWidget(text_edit)
main_box.addLayout(bottom_box)
main_box.addLayout(find_and_progress_box)
self.setLayout(main_box)
self.setGeometry(300, 300, 1100, 700)
self.setWindowTitle('Нечеткий поиск')
self.show()
def start_application():
app = QApplication(sys.argv)
w = Window(QFont("Times", 12))
sys.exit(app.exec_())
它完美无缺。但它在控制台版本中不起作用，因为没有QEventLoop QThread将无法工作：
import fuzzysearch
class ConsoleVersion():
def __init__(self, text, words):
self.text = text
self.words = words
def search_words_in_text(self):
with self.text:
with self.words:
self.f = fuzzysearch.FuzzySearch(self.text.read(), self.words.read(), False)
self.f.sig_insertions.connect(self.get_insertions)
self.f.start()
def get_insertions(self, insertions):
print(insertions)
在主文件中我写了解析参数并在两个版本之间选择
import argparse
import gui
import console_version
def parse_args():
parser = argparse.ArgumentParser(description='Fuzzy search in text')
parser.add_argument('-g', '--graphics', help='graphical version', action='store_true')
parser.add_argument('-c', '--console', help='console version', nargs=2, type=argparse.FileType('r'), metavar=('TEXTFILE', 'WORDSFILE'))
return parser.parse_args()
if __name__ == '__main__':
args = parse_args()
if args.graphics:
gui.start_application()
if args.console:
cv = console_version.ConsoleVersion(args.console[0], args.console[1])
cv.search_words_in_text()
和模块text_methods：
from re import split, sub
def transform_text_to_dict(text, case_sensitive):
text_dict = {}
index = 0
if case_sensitive:
splitted_text = split("[^'а-яА-ЯA-Za-z0-9_-]", text)
else:
splitted_text = split("[^'а-яА-ЯA-Za-z0-9_-]", text.lower())
for element in splitted_text:
if element not in text_dict:
text_dict[element] = []
text_dict[element].append(index)
index += len(element) + 1
return text_dict
def transform_words_to_list(words, case_sensitive):
words = sub("^\s+|\n|\r|\s+$", '', words)
if case_sensitive:
return split(' *, *', words)
else:
return split(' *, *', words.lower())
'''Damerau-Levenstein'''
def find_distance(word1: str, word2: str):
len1, len2 = len(word1), len(word2)
if len1 > len2:
word1, word2 = word2, word1
len1, len2 = len2, len1
current_row = range(len1 + 1)
previous_row = range(len1 + 1)
pre_previous_row = range(len1 + 1)
for i in range(1, len2 + 1):
if i == 1:
previous_row, current_row = current_row, [i] + [0] * len1
else:
pre_previous_row, previous_row, current_row = previous_row, current_row, [i] + [0] * len1
for j in range(1, len1 + 1):
add = previous_row[j] + 1
delete = current_row[j - 1] + 1
change = previous_row[j - 1]
if word1[j - 1] != word2[i - 1]:
change += 1
if word1[j - 1] == word2[i - 2] and word1[j - 2] == word2[i - 1]:
transpose = pre_previous_row[j - 2] + 1
current_row[j] = min(add, delete, change, transpose)
else:
current_row[j] = min(add, delete, change)
return current_row[len1]
def is_optimal_distance(word1 : str, word2 : str):
distance = find_distance(word1, word2)
l = min(len(word1), len(word2))
return distance <= l // 4
所以你能告诉我什么？
答案 0 :(得分：0)
Qt所以要处理任务总是需要一个内部为它创建的循环，必须构造一个QCoreApplication，QGuiApplication或QApplication类型的对象，这需要它例如，QThread的情况不是一个线程但是一个线程处理程序正在监视线程的状态，如果你没有放置应用程序立即关闭，因为run方法没有在主线程中执行
if args.console:
app = QCoreApplication(sys.argv)
cv = console_version.ConsoleVersion(args.console[0], args.console[1])
cv.search_words_in_text()
sys.exit(app.exec_())