I have done this in python 2.7 idle and it works well.
l = []
def one():
l.append('1one')
def two():
l.append(None)
def three():
l.append('three')
def four():
l.append(None)
def empty():
del l[:]
def Filter():
four()
two()
one()
three()
for item in l:
try:
print [x for x in l if x is not '' and x is not None'][0]
pass
except:
pass
empty()
if __name__=='__main__':
Filter()
My aim is to return values in the list 'l' to the view page. After which,
the list is to remain empty. When the list is not empty and I refresh the
page, new items keep adding to the 'l' in addition to the previous ones.
i don't know why it works in idle and not in web2py.
Kind regards
--
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