C:\Users\a0500583>pip install pyserial
を行うと下記のエラーが出て解決できず困っています
解決方法を教えてください
C:\Users\a0500583> pip install pyserial
Defaulting to user installation because normal site-packages is not writeable
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000186D2558880>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /simple/pyserial/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000186D2558370>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /simple/pyserial/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000186D2559030>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /simple/pyserial/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000186D25591B0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /simple/pyserial/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x00000186D2559330>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /simple/pyserial/
ERROR: Could not find a version that satisfies the requirement pyserial (from versions: none)
ERROR: No matching distribution found for pyserial
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