Python：无法使用 pip 安装包答案

【问题标题】：Python: cannot install packages with pipPython：无法使用 pip 安装包
【发布时间】：2021-01-29 09:35:23
【问题描述】：

我试图安装 Python 包但显示如下错误，我认为可能是因为我使用了我公司的笔记本电脑并且它被审查了，但我不确定这是否是原因，如果还有其他原因可能的解决方案请帮助。蟒蛇 3.7 点 10.0.1

(base) C:\>pip install pyvis
Collecting pyvis
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045)'))': /simple/pyvis/
  Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045)'))': /simple/pyvis/
  Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045)'))': /simple/pyvis/
  Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045)'))': /simple/pyvis/
  Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045)'))': /simple/pyvis/
  Could not fetch URL https://pypi.org/simple/pyvis/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pyvis/ (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045)'))) - skipping
  Could not find a version that satisfies the requirement pyvis (from versions: )
No matching distribution found for pyvis
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045)'))) - skipping

【问题讨论】：

标签： python installation pip package

【解决方案1】：

试试下面的命令。

pip install --trusted-host pypi.python.org --trusted-host files.pythonhosted.org pip --trusted-host pypi.org pyvis -vvv

【讨论】：

嗨@CForce99，感谢您的回答，在我输入第一个命令后，它显示：tensorboard 2.3.0 需要 setuptools>=41.0.0，但您将拥有 setuptools 40.2.0不兼容。 google-auth 1.22.0 要求 setuptools>=40.3.0，但您将需要 setuptools 40.2.0，这是不兼容的。
我应该如何获得新的 setuptools？
pip install --upgrade setuptools 会尽我所知
@XaviorL 你试过--upgrade setuptools吗？
我试过也遇到了同样的问题：>pip install --upgrade setuptools

【解决方案2】：

根据您的 cmets 尝试： pip install --upgrade setuptools

然后重试：pip install pyvis

【讨论】：

您的答案没有回答 ssl 错误，添加答案的正确方法是编辑原始答案。
据我所知，ssl 错误可能是由 pypi 拒绝旧版本引起的，但您很可能是对的。
你是对的，但由于 ssl 错误，他无法更新 setuptools。
那么我认为解决方案可能是从 setuptools pypi repo 下载文件然后手动使用