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I want to change the color of font basing on the user input.
More precisely, if a user gives a certain word, I want only this word to be red and leave the rest of text with the same color.

I was thinking to interpret every given character and if the pattern matches, do the following:

# to move the cursor to the beginning of given input pattern
self.textEdit.moveCursor(QTextCursor.End - 3)
responseStyle = "<span style=\"  color:" + RESPONSE_COLOR + ";\" >"
# change the style
self.textEdit.insertHtml(responseStyle)
self.textEdit.moveCursor(QTextCursor.End)
# end the changed style section
self.textEdit.insertHtml("</span>")
However, the color doesn't change.

Does anyone have an idea how to solve it?