ImportError in Python library

Question

I am trying the python-upwork library and followed the setup. pip freeze shows required libraries:

httplib2==0.10.3
httplib2.system-ca-certs-locater==0.1.2
macholib==1.5.1
matplotlib==1.3.1
modulegraph==0.10.4
numpy==1.8.0rc1
oauth2==1.5.211
urllib3==1.10

However trying to create client gives

client = upwork.Client(public_key, secret_key)
  File "/Library/Python/2.7/site-packages/upwork/client.py", line 119, in __init__
    ca_certs=ca_certs_locater.get(),
  File "/Library/Python/2.7/site-packages/ca_certs_locater/__init__.py", line 36, in get
    raise ImportError()

I found this link and it sounds like python cannot find the cert to validate upwork.com. I tried following suggestions but still same issue. I'm not sure where to put the cacerts.pem file.

Answer 1

Answering my own question. Here is what worked for me. I am on Mac.

Download the latest pem file from link at bottom of this page. Then force copy to specific location and rename it:

sudo cp cacert.pem /etc/ssl/certs/ca-certificates.crt

Then it works!

Answer 2

Please, try using the env variable: HTTPLIB_CA_CERTS_PATH - it should solve the issue.

Important Make sure that you use httplib2.system-ca-certs-locater 0.1.2 that supports HTTPLIB_CA_CERTS_PATH in compare to httplib2-ca_certs_locater. See recommendations here - https://github.com/upwork/python-upwork#ssl-certificates-note.

Answer 3

There are 3 options for this (based on this repo python-upwork :

1. if you are on linux move the ca-cert to /etc/ssl/certs/ca-certificates.crt
2. if you are on osx move the ca-cert to /usr/local/etc/openssl/cert.pem
3. if you want to use custom path, use variable env UPWORK_SSL_CERT and set the custom path value.