msvcrt.getch prints twice inside loop

[snippsat]

Can do a test,use repr() to see what really going on.

import msvcrt

while True:
    character = msvcrt.getch()
    print(repr(character))
    if character == b'q':
        break

So i get b'\x00' normal key and b'\xe0' for function keys.

>>> import msvcrt
>>> help(msvcrt.getch)
Help on built-in function getch in module msvcrt:

getch()
    Read a keypress and return the resulting character as a byte string.
    
    Nothing is echoed to the console. This call will block if a keypress is
    not already available, but will not wait for Enter to be pressed. If the
    pressed key was a special function key, this will return '\000' or
    '\xe0'; the next call will return the keycode. The Control-C keypress
    cannot be read with this function.

So it say that next call will return keycode.
Then can write it like this.

import msvcrt
import sys

while True:
    ch = msvcrt.getch()
    if ch in b'\x00':
        ch = msvcrt.getch() # Second call returns the scan code
    if ch in b'\xe0':
        ch = msvcrt.getch() # Second call Function keys
    if ch == b'q':
       sys.exit()
    else:
       print(f'Key Pressed: {ch}')

Output:
E:\1
λ python b1.py
Key Pressed: b'h'
Key Pressed: b'e'
Key Pressed: b'l'
Key Pressed: b'l'
Key Pressed: b'o'
Key Pressed: b'I'
Key Pressed: b'I'
Key Pressed: b'I'

Writing hello and 3 times Page Up,as you see no extra space.
Not doing any encoding here utf-8 may be wrong as key are ASCII.
Here is the table.
I pushed Page Up 3 times last b'I'
Let see if it match with table that say Page Up is 73.

>>> k = b'I'
>>> ord(k)
73

Also look at doc there are eg msvcrt.getwche() which return Unicode.
Did not test that,maybe it easier to keep all as bytes and use ord() if need also need function key decoding.