On 24/06/2021 12:44, Richard Damon wrote:
On 6/24/21 7:09 AM, Simão Afonso wrote:
On 2021-06-24 20:59:31, Steven D'Aprano wrote:
Seriously, there's a time to realise when arguments against a feature
devolve down to utterly spurious claims that Python programmers are
idiots who will be confused by:
from extensions use flatten
mylist.flatten()
but can instantly understand:
from extensions import flatten
flatten(mylist)
Does this mean importing a module can modify other objects, including
builtins? Should this spooky-action-at-a-distance be encouraged?
OTOH, this already happens in the stdlib with rlcompleter, I assume
using monkey-patching. This is a special case for interactive use,
though.
https://docs.python.org/3/library/rlcompleter.html
Yes, importing a module runs the global code in that module, and that
code can not only define the various things in that module but can also
manipulate the contents of other modules.
This doesn't mean that spooky-action-at-a-distance is always good, but
sometimes it is what is needed. You need to be aware of the power that
you wield.
+1. E.g. I have a module that converts `print` to a version that
prompts for continuation after each screenful of output. Very handy!
Power is good, as long as it's used with discretion.
Rob Cliffe
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