Re: how to search item in list of list

[Larry Hudson via Python-list]

On 06/12/2016 08:29 PM, meInvent bbird wrote:
once a nested list have a word "node" then true else false
def search(current_item):
     if isinstance(current_item, list):
         if len(current_item)==4:
             if [item for item in current_item if item[4] == "node"] != []:
                 return True
         if True in [search(item) for item in current_item]:
             return True
         else:
             return False

search(mresult)

but it return false


mresult = [[(2, {'11': 1, '10': 1, '00': 0, '01': 1}, ['000', '001', '010', 
'011', '100',
'101', '110', '111'], 'xy', 'start')], [(2, {'11': 1, '10': 1, '00': 0, '01': 1}
, ['000', '001', '010', '011', '100', '101', '110', '111'], 'yz', 'start')], [(2
, {'11': 1, '10': 1, '00': 0, '01': 1}, ['000', '001', '010', '011', '100', '101
', '110', '111'], 'xz', 'start')], [(2, {'11': 1, '10': 0, '00': 0, '01': 0}, ['
000', '001', '010', '011', '100', '101', '110', '111'], 'xy', 'start')], [(2, {'
11': 1, '10': 0, '00': 0, '01': 0}, ['000', '001', '010', '011', '100', '101', '
110', '111'], 'yz', 'start')], [(2, {'11': 1, '10': 0, '00': 0, '01': 0}, ['000'
, '001', '010', '011', '100', '101', '110', '111'], 'xz', 'start')], [(2, {'11':
  1, '10': 0, '00': 1, '01': 1}, ['000', '001', '010', '011', '100', '101', 
'110'
, '111'], 'xy', 'start')], [(2, {'11': 1, '10': 0, '00': 1, '01': 1}, ['000', '0
01', '010', '011', '100', '101', '110', '111'], 'yz', 'start')], [(2, {'11': 1,
'10': 0, '00': 1, '01': 1}, ['000', '001', '010', '011', '100', '101', '110', '1
11'], 'xz', 'start')], [(1, {'11': 1, '10': 1, '00': 0, '01': 1}, ['00', '01', '
11', '11', '10', '11', '11', '11'], 'xy', 'node')], [(1, {'11': 1, '10': 1, '00'
: 0, '01': 1}, ['00', '01', '10', '11', '11', '11', '11', '11'], 'xy', 'node')],
  [(1, {'11': 1, '10': 1, '00': 0, '01': 1}, ['00', '00', '10', '10', '10', 
'10',
  '11', '11'], 'xy', 'node')], [(1, {'11': 1, '10': 1, '00': 0, '01': 1}, ['00',
'00', '10', '11', '10', '10', '10', '11'], 'xy', 'node')], [(1, {'11': 1, '10':
1, '00': 0, '01': 1}, ['00', '00', '10', '10', '10', '11', '10', '11'], 'xy', 'n
ode')]]


I (manually) reformatted your list and found you have a missing left square 
bracket in the middle.
But the way your list is formatted here I really can't tell you where it is -- you'll have to 
reformat
it and/or use an editor that highlights matching brackets to find it yourself.  
Most programming
editors have that bracket matching capability.

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     -=- Larry -=-
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