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167 changes: 90 additions & 77 deletions InteractiveTool/LearnRegex.py
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Original file line number Diff line number Diff line change
@@ -1,139 +1,152 @@
# Python Regular Expressions - GUI Interactive Tool
# Chandra Lingam
# Cloud Wave LLC
#
# Compatible with 3.x version of python
# Distributed under GNU Public License - https://www.gnu.org/licenses/gpl-3.0.en.html
"""
Python Regular Expressions - GUI Interactive Tool
Chandra Lingam
Cloud Wave LLC

# Version History
# Original Version - Chandra Lingam
# PyQt5 migration - Sash Eranki
# Changed txtResult to QPlainTextEdit as QTextEdit automatically renders html content.
# it was difficult to work with html input text - Chandra Lingam
Compatible with 3.x version of python
Distributed under GNU Public License - https://www.gnu.org/licenses/gpl-3.0.en.html

Version History
Original Version - Chandra Lingam
PyQt5 migration - Sash Eranki
Changed txtResult to QPlainTextEdit as QTextEdit automatically renders html content.
it was difficult to work with html input text - Chandra Lingam
"""


import sys
from PyQt5 import QtGui, QtWidgets #modified from PyQt4 to PyQt5 for anaconda 3.5 distr
from PyQt5 import QtGui, QtWidgets # modified from PyQt4 to PyQt5 for anaconda 3.5 distr
import re
import time


class LearnRegex(QtWidgets.QWidget):

def __init__(self):
super(LearnRegex, self).__init__()

self.init_ui()

def init_ui(self):
self.setFont(QtGui.QFont("Sans Serif", 12))
self.txtPattern = QtWidgets.QLineEdit()
self.txtRepPattern = QtWidgets.QLineEdit()
# Changed to plain text
self.txtText= QtWidgets.QPlainTextEdit()
self.txtText = QtWidgets.QPlainTextEdit()
# TODO: changed QTextEdit to QPlainTextEdit
self.txtResult = QtWidgets.QPlainTextEdit()

self.regex = None
self.regexText = None
lblPattern = QtWidgets.QLabel('Pattern')
lblRepPattern = QtWidgets.QLabel('Replacement Pattern')
lblText = QtWidgets.QLabel('Text')
lblResult = QtWidgets.QLabel('Result')
btnMatch = QtWidgets.QPushButton('Match')
btnNextMatch = QtWidgets.QPushButton('Next Match')
btnReplace = QtWidgets.QPushButton('Replace')
btnSplit = QtWidgets.QPushButton('Split')

btnMatch.clicked.connect(self.match_click)
btnNextMatch.clicked.connect(self.next_match_click)
btnReplace.clicked.connect(self.replace_click)
btnSplit.clicked.connect(self.split_click)

self.regex_text = None
self.regex_group_index = None
self.match_iter = None

self.init_ui()

def init_ui(self):
lbl_pattern = QtWidgets.QLabel('Pattern')
lbl_rep_pattern = QtWidgets.QLabel('Replacement Pattern')
lbl_text = QtWidgets.QLabel('Text')
lbl_result = QtWidgets.QLabel('Result')
btn_match = QtWidgets.QPushButton('Match')
btn_next_match = QtWidgets.QPushButton('Next Match')
btn_replace = QtWidgets.QPushButton('Replace')
btn_split = QtWidgets.QPushButton('Split')

btn_match.clicked.connect(self.match_click)
btn_next_match.clicked.connect(self.next_match_click)
btn_replace.clicked.connect(self.replace_click)
btn_split.clicked.connect(self.split_click)

grid = QtWidgets.QGridLayout()
grid.setSpacing(10)
grid.addWidget(lblPattern, 1, 0)
grid.addWidget(lbl_pattern, 1, 0)
grid.addWidget(self.txtPattern, 1, 1, 1, 4)
grid.addWidget(lblRepPattern, 2, 0)
grid.addWidget(lbl_rep_pattern, 2, 0)
grid.addWidget(self.txtRepPattern, 2, 1, 1, 4)
grid.addWidget(lblText, 3, 0)

grid.addWidget(lbl_text, 3, 0)
grid.addWidget(self.txtText, 3, 1, 1, 4)
grid.addWidget(btnMatch, 4, 1)
grid.addWidget(btnNextMatch, 4, 2)
grid.addWidget(btnReplace, 4, 3)
grid.addWidget(btnSplit, 4, 4)
grid.addWidget(lblResult, 5, 0)
grid.addWidget(btn_match, 4, 1)
grid.addWidget(btn_next_match, 4, 2)
grid.addWidget(btn_replace, 4, 3)
grid.addWidget(btn_split, 4, 4)
grid.addWidget(lbl_result, 5, 0)
grid.addWidget(self.txtResult, 5, 1, 5, 4)
self.setLayout(grid)

self.setLayout(grid)

self.setGeometry(300, 300, 860, 620)
self.setWindowTitle('Learning Regex with Python')
self.setWindowTitle('Learning Regex with Python')
self.show()



def match_click(self):
# TODO Plain Text
self.txtResult.setPlainText ('Value,Index,Length,ElapsedTime(s)')
self.txtResult.setPlainText('Value,Index,Length,ElapsedTime(s)')
try:
self.regex = re.compile(self.txtPattern.text())
except Exception as e:
except Exception as e:
QtWidgets.QMessageBox.critical(self, 'Error', 'Pattern error: {0}'.format(str(e)))
return

self.regex_text = self.txtText.toPlainText()
self.regex_group_index = dict((v,k) for k,v in self.regex.groupindex.items())
self.regex_group_index = dict((v, k) for k, v in self.regex.groupindex.items())
self.match_iter = self.regex.finditer(self.regex_text)
self.highlight_match()

def next_match_click(self):
self.highlight_match()

def replace_click(self):
self.txtResult.setPlainText(re.sub(self.txtPattern.text(), self.txtRepPattern.text(), self.txtText.toPlainText()))

self.txtResult.setPlainText(
re.sub(self.txtPattern.text(), self.txtRepPattern.text(), self.txtText.toPlainText())
)

def split_click(self):
self.txtResult.setPlainText("")
for s in re.split(self.txtPattern.text(), self.txtText.toPlainText()):
self.txtResult.appendPlainText(s)

def highlight_match(self):
start_time = None
try:
#self.txtText.setAcceptRichText(False)
self.txtText.setPlainText(self.regex_text)

start_time = time.time()
match = self.match_iter.__next__()
end_time = time.time()

self.txtResult.appendPlainText ('{0},{1},{2},{3:.2f}'.format(match.group(0),match.start(), match.end()-match.start(), end_time - start_time))


self.txtResult.appendPlainText(
'{0},{1},{2},{3:.2f}'.format(
match.group(0), match.start(), match.end() - match.start(), end_time - start_time
)
)

for i in range(0, len(match.groups())):
gn = i+1
gn = i + 1
group_name = None
if gn in self.regex_group_index:
group_name = self.regex_group_index[gn]

self.txtResult.appendPlainText (' Group:{0}, Name:{1}, Value: {2}'.format(gn, group_name, match.group(gn)))


self.txtResult.appendPlainText(
' Group:{0}, Name:{1}, Value: {2}'.format(gn, group_name, match.group(gn))
)

self.highlighter(match.start(), match.end())

except StopIteration:
end_time = time.time()
self.txtResult.appendPlainText ('End, Elapsed Time (s): {0:0.2f}'.format(end_time - start_time))
def highlighter(self,start,end):
format = QtGui.QTextCharFormat()
format.setBackground(QtGui.QBrush(QtGui.QColor("yellow")))
end_time = time.time()
self.txtResult.appendPlainText('End, Elapsed Time (s): {0:0.2f}'.format(end_time - start_time))

def highlighter(self, start, end):
format_ = QtGui.QTextCharFormat()
format_.setBackground(QtGui.QBrush(QtGui.QColor("yellow")))
cursor = self.txtText.textCursor()
cursor.setPosition(start)
cursor.movePosition(QtGui.QTextCursor.Right,QtGui.QTextCursor.KeepAnchor,end-start)
cursor.mergeCharFormat(format)

cursor.movePosition(QtGui.QTextCursor.Right, QtGui.QTextCursor.KeepAnchor, end - start)
cursor.mergeCharFormat(format_)


def main():

app = QtWidgets.QApplication(sys.argv)
ex = LearnRegex()
sys.exit(app.exec_())


if __name__ == '__main__':
main()