Checking if pressed key is an alphabet or space in PyQt

Question

I have implemented a custom QTextEdit class in which I am overiding the keyPressEvent method.

I want to check if the key that was pressed is among the following:
1. Capital alphabets
2. Lowercase alphabets
3. Space

If my function declaration is something like:

def keyPressEvent(self, event):

I could do something like:

if event.key() in (
    QtCore.Qt.Key_A,
    QtCore.Qt.Key_B,
    QtCore.Qt.Key_C,
    QtCore.Qt.Key_D,
    ....
    ....

And so on.

How would I loop through these values? And how will I access the actual character that is pressed? I want to create a string of the keys pressed as long as they are alphabets.

user_5963631 · Answer

Check out the build in string methods (eg isalpha()) and QKeyEvent.text()

s = event.text()
if s == ' ':
    print(s+' is space')
elif s.isalpha():
    if s.isupper():
        print(s+' is upper')
    else:
        print(s+' is lower')
else:
    print(s+' is something else')

user_11164687 · Answer

Found an answer. event.key() is just a hexadecimal number.

user_4656159 · Answer

Okay @Jonas has a good answer and depending on what you trying to do you do not have to ever loop through a list you can simple check to see if it is IN a list;

myList = [Qt.Key_A,Qt.Key_B,Qt.Key_C,... Qt.Key_Z]

if event.text() in myList:
   print("In My List")

Checking if pressed key is an alphabet or space in PyQt

3 Answers