python问题：vscode切换环境，pip安装库网络错误
记录一下遇见的python问题。
vscode切换环境
在vscode上面的搜索框输入
> select interpreter
然后选择需要的环境。
pip安装库网络错误
用requirements.txt来安装需要的依赖包及其版本号，
pip install -r requirements.txt
出现：
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:997)'))': /simple/gymnasium/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:997)'))': /simple/gymnasium/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:997)'))': /simple/gymnasium/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:997)'))': /simple/gymnasium/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:997)'))': /simple/gymnasium/
Could not fetch URL https://pypi.org/simple/gymnasium/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/gymnasium/ (Caused by SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:997)'))) - skipping
ERROR: Could not find a version that satisfies the requirement gymnasium==0.28.1 (from versions: none)
ERROR: No matching distribution found for gymnasium==0.28.1
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(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:997)'))) - skipping
解决：加镜像源
pip install -r requirements.txt -i http://mirrors.aliyun.com/pypi/simple
/ --trusted-host mirrors.aliyun.com
