diff --git a/mouse/__init__.py b/mouse/__init__.py
index 71a9d14..3a21f46 100644
--- a/mouse/__init__.py
+++ b/mouse/__init__.py
@@ -166,10 +166,6 @@ def on_button(callback, args=(), buttons=(LEFT, MIDDLE, RIGHT, X, X2), types=(UP
                 callback(*args)
     _listener.add_handler(handler)
     return handler
-    
-def on_pressed(callback, args=()):
-    """ Invokes `callback` with `args` when the left button is pressed. """
-    return on_button(callback, args, [LEFT], [DOWN])
 
 def on_click(callback, args=()):
     """ Invokes `callback` with `args` when the left button is clicked. """
diff --git a/mouse/__init__.pyc b/mouse/__init__.pyc
deleted file mode 100644
index 0e8936f..0000000
Binary files a/mouse/__init__.pyc and /dev/null differ
diff --git a/mouse/__pycache__/__init__.cpython-38.pyc b/mouse/__pycache__/__init__.cpython-38.pyc
deleted file mode 100644
index 80e1dc4..0000000
Binary files a/mouse/__pycache__/__init__.cpython-38.pyc and /dev/null differ
diff --git a/mouse/__pycache__/_generic.cpython-38.pyc b/mouse/__pycache__/_generic.cpython-38.pyc
deleted file mode 100644
index f58ab70..0000000
Binary files a/mouse/__pycache__/_generic.cpython-38.pyc and /dev/null differ
diff --git a/mouse/__pycache__/_mouse_event.cpython-38.pyc b/mouse/__pycache__/_mouse_event.cpython-38.pyc
deleted file mode 100644
index 5839c75..0000000
Binary files a/mouse/__pycache__/_mouse_event.cpython-38.pyc and /dev/null differ
diff --git a/mouse/__pycache__/_nixcommon.cpython-38.pyc b/mouse/__pycache__/_nixcommon.cpython-38.pyc
deleted file mode 100644
index c614439..0000000
Binary files a/mouse/__pycache__/_nixcommon.cpython-38.pyc and /dev/null differ
diff --git a/mouse/__pycache__/_nixmouse.cpython-38.pyc b/mouse/__pycache__/_nixmouse.cpython-38.pyc
deleted file mode 100644
index 90d0e73..0000000
Binary files a/mouse/__pycache__/_nixmouse.cpython-38.pyc and /dev/null differ
diff --git a/mouse/_generic.pyc b/mouse/_generic.pyc
deleted file mode 100644
index f50aff6..0000000
Binary files a/mouse/_generic.pyc and /dev/null differ
diff --git a/mouse/_mouse_event.pyc b/mouse/_mouse_event.pyc
deleted file mode 100644
index 3c80f97..0000000
Binary files a/mouse/_mouse_event.pyc and /dev/null differ
diff --git a/mouse/_nixcommon.py b/mouse/_nixcommon.py
index a77de1d..d240f99 100644
--- a/mouse/_nixcommon.py
+++ b/mouse/_nixcommon.py
@@ -20,8 +20,6 @@ EV_REL = 0x02
 EV_ABS = 0x03
 EV_MSC = 0x04
 
-INVALID_ARGUMENT_ERRNO = 22
-
 def make_uinput():
     import fcntl, struct
 
@@ -31,12 +29,8 @@ def make_uinput():
     fcntl.ioctl(uinput, UI_SET_EVBIT, EV_KEY)
 
     UI_SET_KEYBIT = 0x40045565
-    try:
-        for i in range(0x300):
-            fcntl.ioctl(uinput, UI_SET_KEYBIT, i)
-    except OSError as e:
-        if e.errno != INVALID_ARGUMENT_ERRNO:
-            raise e
+    for i in range(256):
+        fcntl.ioctl(uinput, UI_SET_KEYBIT, i)
 
     BUS_USB = 0x03
     uinput_user_dev = "80sHHHHi64i64i64i64i"
diff --git a/mouse/_nixcommon.pyc b/mouse/_nixcommon.pyc
deleted file mode 100644
index 1112fea..0000000
Binary files a/mouse/_nixcommon.pyc and /dev/null differ
diff --git a/mouse/_nixmouse.pyc b/mouse/_nixmouse.pyc
deleted file mode 100644
index 13515f6..0000000
Binary files a/mouse/_nixmouse.pyc and /dev/null differ