[Tutor] Reload() in v3? WAS Re: IDEs

[Steven D'Aprano]

Alan Gauld wrote:

>>>> import os
>>>> reload(os)
> Traceback (most recent call last):
>  File "<pyshell#65>", line 1, in <module>
>    reload(os)
> NameError: name 'reload' is not defined
>>>>
> 
> Has reload been removed in V3?

Not removed, just moved.

 >>> import imp
 >>> imp.reload
<built-in function reload>


The reason for moving it is that reload is quite simple-minded and full 
of traps for the unwary, and consequently isn't useful enough to be in 
the build-it namespace.


> Whats the alternative? Does a repeated import auto-reload?

Absolutely not! That would make importing much more expensive, and 
change the behaviour. import(module) caches the module in sys, so that 
subsequent imports are fast.



-- 
Steven