Am 13.04.2011 01:06, schrieb Ethan Furman:
--> def func():
--> var1 = something()
--> var2 = something_else('this')
--> return? var1.hobgle(var2)
--> var3 = last_resort(var1)
--> return var3.wiglat(var2)
This makes me think of a decorator which can mimic the wantend behaviour:
def getfirst(f):
from functools import wraps
@wraps(f)
def func(*a, **k):
for i in f(*a, **k):
if i: return i
return func
# [BTW: a kind of "return decorator" would be nice here ;-)]
@getfirst
def func():
var1 = something()
var2 = something_else('this')
yield var1.hobgle(var2)
var3 = last_resort(var1)
yield var3.wiglat(var2)
yield "Even that did not work."
This has the advantage of being flexible about which condition to
evaluate: maybe the func does return tuples of which only the 2nd part
is relevant concerning the check. Then just do
def getfirst(f):
from functools import wraps
@wraps(f)
def func(*a, **k):
for i in f(*a, **k):
if i[1]: return i
return func
@getfirst
def func():
var1 = something()
var2 = something_else('this')
yield "first try", var1.hobgle(var2)
var3 = last_resort(var1)
yield "second try", var3.wiglat(var2)
yield "default value", "Even that did not work."
Disclaimer: Untested, but you should get the idea.
Thomas
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