Update 'CARDPUTER CircuitPython/keyboard.py'

CARDPUTER CircuitPython/keyboard.py

             "0x4":"CTRLD", "0x13":"CTRLS", "0x9":"    ", "0x60":"ESC", "0xf":"CTRLO"
         }
 
-    def scan(self):
-        code=hex(ord(sys.stdin.read(1)))
+    def scan(self, keycode = None):
+        if not keycode:
+            code=hex(ord(sys.stdin.readline(1)))
+        else:
+            code = keycode
         #printing the code can be useful for debugging purposes, to check that the codes have been logged correctly if something unexpected is happening
         #print(code)
         key = None
         elif code in self.special:
             key = self.special[code]
             
-        if key:
-            return key
-        else:
-            return "UNKNOWN "+code
+        return key
 
     def is_alphanumeric(self, key):
         if key in self.special.values() or key in self.chars.values():
             return False
         else:
-            return True
+            return True