问题
I have been trying to install pymc for some time on a Windows PC behind a very complicated proxy; effectively making this an installation on a computer not connected to the internet. I have tried - unsuccessfully - to set a proxy in the condarc file but I still get error messages
conda install -c https://conda.binstar.org/pymc pymc Fetching package metadata: SSL verification error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:645)
回答1:
To solve this, you need to download the tar file (even if using Windows) that the installer is trying to fetch and then use offline mode:
Use this command which will error, to determine the file to be downloaded:
>conda install -c https://conda.binstar.org/pymc pymc
Fetching package metadata: SSL verification error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:645)
....
Solving package specifications: ......................
The following packages will be downloaded:
package | build
---------------------------|-----------------
pymc-2.3.5 | np110py35_0 402 KB defaults
The following NEW packages will be INSTALLED:
pymc: 2.3.5-np110py35_0 defaults
Proceed ([y]/n)? y
Fetching packages ...
Could not connect to https://repo.continuum.io/pkgs/free/win-64/pymc-2.3.5-np110py35_0.tar.bz2
... [error message continues]...
Now download the tar file mentioned in the error message:
https://repo.continuum.io/pkgs/free/win-64/pymc-2.3.5-np110py35_0.tar.bz2
And then run this command with the path to the tar file:
>conda install --offline C:\pymc-2.3.5-np110py35_0.tar.bz2
回答2:
Just of notes: "-c conda-forge" might be handy for some other packages. For example:
conda install -c conda-forge python-levenshtein
回答3:
Adding to the solution above. Anyone met "SSL verification error" can just turn the verification step off temporarily in ~/.condarc
channels:
- defaults
ssl_verify: true
In this way, you could install from your local hub.
来源：https://stackoverflow.com/questions/34316951/install-anaconda-library-from-a-local-source