Reinstall SQLAlchemy with speedups after installing compiler

Question

I tried to install sqlalchemy using pip3 install sqlalchemy, but I didn't have clang installed so it warned that "speedups are not enabled". How do I get clang on OS X Yosemite and then how do I reinstall sqlalchemy?

command '/usr/bin/clang' failed with exit status 1
WARNING: The C extension could not be compiled, speedups are not enabled.
Failure information, if any, is above.
Retrying the build without the C extension now.
WARNING: The C extension could not be compiled, speedups are not enabled.
Plain-Python build succeeded.

Answer 1

To get clang you need to install XCode from the App Store.

After that you can re-install SQLAlchemy with pip install --upgrade --force-reinstall SQLAlchemy