How to write a letter that matches the first letter of the image that is found on the screen

I have a list of images:

    def justAnObserver():
        kk = 0
        listOfLetterImages = ['A.png','B.png','C.png','D.png','E.png','F.png','G.png','H.png','I.png','J.png','K.png','L.png','M.png','N.    png','O.png','P.png','Q.png','R.png','S.png','T.png','U.png','V.png','W.png','X.png','Y.png','Z.png']

        while True:
            while True:
                for x in listOfLetterImages:
                    try:
                        if pyautogui.locateOnScreen(x, region=(350,337,98,103)) is not None:
                        print("jest")
                        kk = 1
                        break
                except Exception:
                    continue
            if kk == 1:
                kk=0
                break
            else:
                continue

And I want to, for example, press A on keyboard if A was found, or type R if R was found.

>Solution :

Simply search pyautogui press key will get what you want. See Keyboard Control Functions

x is the filename, x[0] gets the first char of the filename (for example, A), and .lower() convert it to lowercase for press function.

    def justAnObserver():
        kk = 0
        listOfLetterImages = ['A.png','B.png','C.png','D.png','E.png','F.png','G.png','H.png','I.png','J.png','K.png','L.png','M.png','N.    png','O.png','P.png','Q.png','R.png','S.png','T.png','U.png','V.png','W.png','X.png','Y.png','Z.png']

        while True:
            while True:
                for x in listOfLetterImages:
                    try:
                        if pyautogui.locateOnScreen(x, region=(350,337,98,103)) is not None:
                            pyautogui.press(x[0].lower())  # Here!
                            kk = 1
                            break
                except Exception:
                    continue
            if kk == 1:
                kk=0
                break
            else:
                continue

In addition, your code can be rewritten to this for readablility:

import string


def justAnObserver():
    listOfLetterImages = [i+".png" for i in string.ascii_uppercase]

    while True:
        for x in listOfLetterImages:
            try:
                if pyautogui.locateOnScreen(x, region=(350,337,98,103)) is not None:
                    pyautogui.press(x[0].lower())  # Here!
                    return
            except:
                pass