import re from PyQt5.QtCore import QRegularExpression, QRegularExpressionMatch pattern = QRegularExpression("(?i)hello") string = "Hello, world!" match = pattern.match(string) if match.hasMatch(): print("Match found!")
import re from PyQt5.QtCore import QRegularExpression pattern = QRegularExpression("(?i)hello") string = "Hello, world!" replacement = "Hi" new_string = pattern.globalReplace(string, replacement) print(new_string)In this example, the regular expression pattern is defined to match the word "hello" in a case-insensitive manner. The globalReplace() method is called on the pattern object to replace all instances of the pattern in the input string with the replacement string "Hi". The PyQt5 package library provides a comprehensive set of tools for building Python GUI applications, including support for regular expressions through the QtCore module and the QRegularExpression class. These examples demonstrate some of the basic ways that QRegularExpression can be used in Python applications.