Duncan Booth wrote:
Gary Herron <gher...@islandtraining.com> wrote:
It's naive to think this question even makes sense. There are many ways
f can be called which don't involve a parameter:
f(42)
f(time())
f(a+123)
f(sin(a))
f(f(1))
and so on.
So long as the OP doesn't care if they get no names or several name that
might not matter. However, explicitly passing in the name you want to use
is likely to be more useful.
def getcallersnames(obj):
f = inspect.currentframe().f_back.f_back
return [name for name in f.f_locals if f.f_locals[name] is obj]
def bip(x):
print getcallersnames(x)
def foo(bar):
baz = bar
bip(baz)
bip(baz+1)
foo(3)
['bar', 'baz']
[]
How do you know which between baz and bar has been used ? Here you get
all names (in locals()) referencing the object passed in argument, you
don't get the one actually used for the call.
Another issue:
class Foo:
test = 'test'
def foo(bar):
bip(bar.test)
f = Foo()
foo(f)
[]
That restricts pretty much the use of getcallersnames.
As said before, there is hardly any legit design which would require to
know the actual refrence used to pass a parameter.
JM
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