$ pip install -v pandas
Created temporary directory: /tmp/pip-ephem-wheel-cache-hvbcg1k_
Created temporary directory: /tmp/pip-install-7_spppvw
Collecting pandas
1 location(s) to search for versions of pandas:
* https://pypi.org/simple/pandas/
Getting page https://pypi.org/simple/pandas/
Looking up "https://pypi.org/simple/pandas/" in the cache
Current age based on date: 324440
Freshness lifetime from max-age: 600
Freshness lifetime from request max-age: 600
Starting new HTTPS connection (1): pypi.org
它至少会挂起1-2分钟。
使用选项--index-url=http://pypi.python.org/simple/
可以大大提高速度,但似乎并不理想,因为它跳过了加密。是否有解决此问题的方法?
此症状可能表示推荐答案路由或dns存在问题。任何遇到此问题的人都可以尝试禁用IPv6作为解决方法,直到您找到根本原因。您可以通过执行以下操作暂时禁用Ubuntu上的IPv6(直到下次重启):
sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1