7stud said:
python ignores the names inside a function when it creates the
function. This "program" will not produce an error:
def f():
print x
python parses the file and creates the function object and assigns the
function object to the variable f. It's not until you execute the
function that python will raise an error. The same thing happens with
the recursive function.
Thanks for that explanation. So in the OP's example:
Class Demo(object):
def fact(n):
if n < 2:
return 1
else:
return n * fact(n - 1)
_classvar = fact(5)
... no failure occurs when "fact(5)" is invoked, because the lookup of
"fact" in the local scope is a class-scope-lookup, which succeeds. The
failure occurs on the first recursive invocation of fact() in the
statement "return n * fact(n - 1)": the function-scope-lookup of "fact"
fails, and then the interpreter falls back to a global-scope-lookup of
"fact", which also fails.
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