On 2018-04-29 10:20 PM, Ethan Furman wrote:
On 04/29/2018 01:20 PM, Tim Peters wrote:
So, e.g.,
"""
a = 42
def showa():
print(a)
def run():
global a
local a: # assuming this existed
a = 43
showa()
showa()
"""
would print 43 and then 42. Which makes "local a:" sound senseless on
the face of it ;-) "shadow" would be a more descriptive name for what
it actually does.
Yeah, "shadow" would be a better name than "local", considering that
it effectively temporarily changes what other functions see as
global. Talk about a debugging nightmare! ;)
That ain't shadow. That is dynamic scoping.
Shadowing is something different:
def f():
a = 42
def g():
print(a)
local a:
a = 43
g()
g()
should print "42" both times, *if it's lexically scoped*.
If it's lexically scoped, this is just adding another scope: blocks.
(instead of the smallest possible scope being function scope)
--
~Ethan~
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