参考：
https://blog.csdn.net/lhkuxia/article/details/123727389

将键盘码转为字符：

keyboard_code = "63" # 键盘码（不带问号）
character = chr(int(keyboard_code)) # 将键盘码转换为字符
print("键盘码带问号后的结果：", character)

将大写字母转为小写字母：

# 接收键盘输入并转换成小写字母的ASCII码
input_char = input("请输入一个小写字母：")
ascii_code = ord(input_char) - 32 # ASCII码值加上32得到大写字母的ASCII码
print("该小写字母的ASCII码为：", ascii_code)

通过qt确认特殊按钮键盘码：

if key == Qt.Key_Shift:return KeyEvent.ShiftKeyelif key == Qt.Key_Control:return KeyEvent.ControlKeyelif key == Qt.Key_Alt:return KeyEvent.AltKeyelif key == Qt.Key_Space:return KeyEvent.SpaceKeyelif key == Qt.Key_Meta:return KeyEvent.MetaKeyelif key == Qt.Key_Enter or key == Qt.Key_Return:return KeyEvent.EnterKeyelif key == Qt.Key_Up:return KeyEvent.UpKeyelif key == Qt.Key_Down:return KeyEvent.DownKeyelif key == Qt.Key_Left:return KeyEvent.LeftKeyelif key == Qt.Key_Right:return KeyEvent.RightKeyelif key == Qt.Key_Minus:return KeyEvent.MinusKeyelif key == Qt.Key_Underscore:return KeyEvent.UnderscoreKeyelif key == Qt.Key_Plus:return KeyEvent.PlusKeyelif key == Qt.Key_Equal:return KeyEvent.EqualKey