Am 01.09.2011 16:05 schrieb Daniel:
In pseudocode it looks like this, I am using @ to give loops a name:
@loop1
for c in configurations:
@loop2
while not_done:
@loop3
while step1_did_not_work:
@loop4
for substeps in step1 # loop 4a
if hopeless(): continue loop1 # run next configuration
if substepsFailed(): restart loop4 # try again
if substepsWorked(): break loop3 # go on to next
steps, like loop4
let me have a try:
def loop(f):
def wrapper(*a, **k):
while True:
try:
ret = f(*a, **k):
return ret
except wrapper.restart:
continue # next try
except wrapper.stop:
return None
return ret
wrapper.restart = type('restart', (Exception,), {})
wrapper.stop = type('stop', (Exception,), {})
return wrapper
@loop
def level1():
for c in configurations:
level2(c)
@loop
def level2():
while not_done:
level3()
@loop
def level3():
while step1_did_not_work:
level4()
@loop
def level4a():
for substeps in step1
if hopeless: raise level2.stop
if substepsFailed: raise level4a.restart
if substepsWorked: return ok
I don't know if I have the levels right, but that should be a way which
works, without too many indentations.
Another approach could be a decorator which immediately runs the given
functions, after adding the needed exception classes.
Thomas
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