Install Pycurl after mac update to High Sierra - SSL error - pycurl

Question

I updated my mac to high sierra, and now I can't install pycurl. It fails with this message : Curl is configured to use SSL, but we have not been able to determine which SSL backend it is using. Please see PycURL documentation for how to specify the SSL backend manually.
I searched on the documentation and the web and I found some solution that not fix my problem. the most popular is this one :
pip uninstall pycurl
export PYCURL_SSL_LIBRARY=openssl
pip install pycurl
here is the complete error

Answer 1

A solution similar to the one you found worked for me when issued from within my virtualenv. I use Homebrew as a package manager on macOS High Sierra, and Pipenv to manage my project dependencies and virtualenv. The error emerged after adding the PyVimeo API Library, which has PycURL as a dependency, to my project.
The generated errors were, first,
src/pycurl.c:137:4: warning: #warning "libcurl was compiled with SSL
support, but configure could not determine which library was used;
thus no SSL crypto locking callbacks will be set, which may cause
random crashes on SSL requests" [-Wcpp]
then,
ImportError: pycurl: libcurl link-time ssl backend (openssl) is
different from compile-time ssl backend (none/other)
As mentioned in the PycURL docs, the solution was to "tell [PycURL's] setup.py what SSL backend is used." Setting the environment variables recommended in the output of brew info openssl, alone, did not solve the problem.
Then I found a tangentially related Github issue comment and tried the following from within my project's virtualenv:
(env)$ pip uninstall pycurl
(env)$ pip install --upgrade pip
(env)$ export LDFLAGS=-L/usr/local/opt/openssl/lib
(env)$ export CPPFLAGS=-I/usr/local/opt/openssl/include
(env)$ export PYCURL_SSL_LIBRARY=openssl
(env)$ pip install pycurl
The install command gave this output:
Collecting pycurl Using cached
https://files.pythonhosted.org/packages/e8/e4/0dbb8735407189f00b33d84122b9be52c790c7c3b25286826f4e1bdb7bde/pycurl-7.43.0.2.tar.gz
Building wheels for collected packages: pycurl Running setup.py
bdist_wheel for pycurl ... done Stored in directory:
/Users/me/Library/Caches/pip/wheels/d2/85/ae/ebf5ff0f1378a69d082b4863df492bf54c661bf6306a2bd
Successfully built pycurl
tuspy 0.2.1 has requirement pycurl==7.43.0,
but you'll have pycurl 7.43.0.2 which is incompatible. Installing
collected packages: pycurl Successfully installed pycurl-7.43.0.2
I noted the (somewhat petty?) tuspy error and trudged on. This time, my script ran without PycURL complaining.