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def visit(node, parent, field_name, field_index):
    node_item = handle_item(node, parent, field_name, field_index)
    if node_item is None:
        return

    fields = {}
    for field_name, field in ast.iter_fields(node):
        fieldset = fields.setdefault(field_name, [])
        if isinstance(field, list):
            for i, item in enumerate(field):

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data = [1,2,3,[4,5,6,[77,88]]]

def run_through(data):
    for x in data:
        if isinstance(x, list):
            yield from run_through(x)
            continue
        yield x

it = run_through(data)

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def towers(num, frompeg, topeg, aux, final):
    if num > 0:
        towers(num-1, frompeg, aux, topeg, False)
        if final:
            print('final')
        print("move disk %d from %s to %s" % (num, frompeg, topeg))
        towers(num-1, aux, topeg, frompeg, final)

towers(5, 'A', 'B', 'C', True)

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empty file created by nbx

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empty file created by nbx

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empty file created by nbx

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empty file created by nbx

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empty file created by nbx

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