Alioth:~ sizumita$ pyenv install 3.6.3 Downloading Python-3.6.3.tar.xz... ... ERROR: The Python ssl extension was not compiled. Missing the OpenSSL lib? """Alioth:~ sizumita$ python3 Python 3.5.1 (default, Oct 13 2017, 20:28:35) [GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.37)] on darwin Type "help", "copyright", "credits" or "license" for more information.""" >>> import urllib.request >>>