[Sqlalchemy-tickets] Issue #2970: Installation guide should mention that standard "pip install" won't include C extensions (zzzeek/sqlalchemy)

[craigholm <iss...@bi...>]

New issue 2970: Installation guide should mention that standard "pip install" won't include C extensions
https://bitbucket.org/zzzeek/sqlalchemy/issue/2970/installation-guide-should-mention-that

craigholm:

The current version of pip defaults to installing from wheels, when they're available.  This means, by default, "pip install sqlalchemy" will never include C extensions.  The installation guide, however, states that C extensions are included unless the platform doesn't support them, and that it shows a warning in this case.

In my opinion it won't be obvious to most users why the C extensions are omitted.  The installation guide should mention that pip's "--no-use-wheel" option needs to be specified to install C extensions.