?WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ReadTimeoutError("HTTPSConnectionPool(host='download.pytorch.org', port=443): Read timed out. (read timeout=15)")': /whl/lts/1.8/cu102/torchvision/

WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLZeroReturnError(6, 'TLS/SSL connection has been closed (EOF) (_ssl.c:1131)'))': /whl/lts/1.8/cu102/torchvision/

WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLZeroReturnError(6, 'TLS/SSL connection has been closed (EOF) (_ssl.c:1131)'))': /whl/lts/1.8/cu102/torchvision/

WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLZeroReturnError(6, 'TLS/SSL connection has been closed (EOF) (_ssl.c:1131)'))': /whl/lts/1.8/cu102/torchvision/

WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLZeroReturnError(6, 'TLS/SSL connection has been closed (EOF) (_ssl.c:1131)'))': /whl/lts/1.8/cu102/torchvision/

Could not fetch URL https://download.pytorch.org/whl/lts/1.8/cu102/torchvision/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='download.pytorch.org', port=443): Max retries exceeded with url: /whl/lts/1.8/cu102/torchvision/ (Caused by SSLError(SSLZeroReturnError(6, 'TLS/SSL connection has been closed (EOF) (_ssl.c:1131)'))) - skipping 這些警告提

示表明連接下載源時(shí)遇到了問(wèn)題?？赡苁怯捎谶B接超時(shí)或SSL證書(shū)驗(yàn)證失敗導(dǎo)致的。你可以嘗試以下幾種方法來(lái)解決這個(gè)問(wèn)題：

1. 首先，確保你的網(wǎng)絡(luò)連接正常，并且可以訪問(wèn)下載源（https://download.pytorch.org）。

2. 如果你使用的是代理服務(wù)器，請(qǐng)確保代理服務(wù)器的設(shè)置正確，并且沒(méi)有阻止該下載源的訪問(wèn)。

3. 嘗試使用`--timeout`參數(shù)來(lái)增加連接超時(shí)時(shí)間，例如：

? ?```

? ?pip3 install torch==1.8.2 torchvision==0.9.2 --timeout 100

? ?```

? ?這將增加連接超時(shí)時(shí)間為100秒。你可以根據(jù)需要調(diào)整超時(shí)時(shí)間。

4. 如果你的網(wǎng)絡(luò)環(huán)境限制了SSL連接，請(qǐng)嘗試使用`--trusted-host`參數(shù)來(lái)跳過(guò)SSL證書(shū)驗(yàn)證，例如：

? ?```

? ?pip3 install torch==1.8.2 torchvision==0.9.2 --trusted-host download.pytorch.org

? ?```

? ?這將跳過(guò)SSL證書(shū)驗(yàn)證。請(qǐng)注意，這可能會(huì)存在一定的安全風(fēng)險(xiǎn)，請(qǐng)謹(jǐn)慎使用。

如果問(wèn)題仍然存在，建議嘗試使用其他網(wǎng)絡(luò)環(huán)境（例如使用不同的網(wǎng)絡(luò)連接或者更換網(wǎng)絡(luò)），或者等待一段時(shí)間后再次嘗試安裝。