Possible issue when using Cvxportfolio's internet access through a VPN about cvxportfolio HOT 4 OPEN

Hello, it appears there are issues with low-level internet access Python modules. Is the machine you ran this on connected to the internet? You can use Cvxportfolio without internet access (look at the documentation of UserProvidedMarketData) but the tests assume you have a working connection. And no, I don't think there's any missing package there.

Or maybe you have some proxy or firewall configuration that prevents that machine to access the two http addresses (Yahoo Finance and Fred) those tests were targeting ?

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Re: Chinese firewall. That probably explains it, the pd.read_csv in question targets a http resource (you can see it in the source of Fred). If you have access to a VPN you may retry...

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Re: Chinese firewall. That probably explains it, the pd.read_csv in question targets a http resource (you can see it in the source of Fred). If you have access to a VPN you may retry...

Thanks for the help! I use VPN and seems I am able to access Yahoo Finance and Fred website, also successfully ping these main page links but still face the same issues. I agree it should be some issues with low-level internet access Python modules or some complicate/strange internet proxy configuration problems...

I tests some local examples successfully, and I have decided to give up trying the online tests. Thanks again for your quick and kindly reply :)

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Thank you! I'm not sure how to help, for reference one of the two lines on which it fails is something like this:

import pandas as pd
pd.read_csv("https://alfred.stlouisfed.org/graph/alfredgraph.csv?id=CES0500000003&vintage_date=2023-07-06")

If you are able to open that same address in your browser then there's probably something wrong with how the VPN is set up, and beyond my area of expertise...

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