When does “pip install” build a wheel?

Question

I found that in different folders, sometimes pip install will build wheel which takes a lot of time, while sometimes it doesn\'t. I\'m not sure why and how to c

Answer 1

This depends on whether your package is a pure python package (without the need to compile anything, just copy the files somewhere) or a package which also includes c source code (in which case a compilation is necessary and a compiler is called and executed, which takes longer).

http://pythonwheels.com/

You may also want to have a look at the wheel docu:

http://wheel.readthedocs.org/en/latest/