title: how to append a integer in python
body: <p>I have this array:</p>
  
  <pre><code>listPatients =   [[  "Johnson",   "Fred", "N", "2763 Filibuster Drive",  "Lakeland", "FL", "37643", "Q", "05/27/1935", "164-55-0726", "N"]] \
  +                [[ "Williams",  "Betty", "L",    "701 Collage Avenue",   "Orlando", "FL", "31234", "F", "11/27/1971", "948-44-1038", "Y"]] \
  +                [[     "Ling", "Hector", "X",     "1500 Raceway Lane",     "Tampa", "FL", "32785", "M", "10/17/2003", "193-74-0274", "Y"]] \
  +                [[    "Albin",   "Ross", "L",      "207 Daisy Avenue",  "Lakeland", "FL", "32643", "M", "12/08/1990", "458-57-2867", "N"]] \
  +                [[ "Anderson",  "Jason", "O",       "1527 Lewis Road",     "Tampa", "FL", "32785", "M", "11/25/1991", "093-50-1093", "Y"]] \
  +                [[     "Baca",  "Edwin", "L",       "25 Hunters Lane",  "Lakeland", "FL", "32643", "M", "10/30/1992", "159-56-9731", "Y"]] \
  +                [[   "Birner", "Dalton", "M",     "851 Applebe Court",   "Orlando", "FL", "31234", "M", "09/22/1993", "695-21-2340", "Y"]] \
  +                [["Dominguez", "Javier", "B",   "1410 Waterford Blvd",   "Orlando", "FL", "31234", "M", "08/04/1994", "753-66-6482", "N"]] \
  +                [[   "Aimino", "Nicolo", "S",      "2379 Runners Way",  "Lakeland", "FL", "32643", "M", "07/11/1995", "852-73-4196", "Y"]] \
  +                [["Armstrong","Addison", "T",    "46 Hawthorne Drive",  "Lakeland", "FL", "32643", "M", "06/18/1996", "648-81-1456", "Y"]] \
  +                [[    "Beard",    "Ian", "J",  "1814 Constitution Ct",   "Orlando", "FL", "31234", "M", "05/28/1997", "879-61-1829", "N"]] \
  +                [[ "Calderon",  "Yamil", "C",         "345 Cigar Row",     "Tampa", "FL", "32785", "M", "04/07/1998", "123-87-6431", "Y"]] \
  +                [[   "Carter", "Thomas", "P",       "896 Pine Avenue",        "Tampa", "FL", "32785", "M", "03/12/1999", "248-65-3197", "Y"]] \
  +                [[  "Chaname",  "Bryan", "D",    "24 Blue Belt Drive",           "Lakeland", "FL", "32643", "M", "02/23/2000", "741-85-9632", "Y"]] \
  +                [[   "Chaney", "Chaney", "Z",    "2589 College Court",     
  "Orlando", "FL", "31234", "M", "01/15/2001", "963-25-7418", "Y"]]
  </code></pre>
  
  <p>I want to append the age; which is a calulation after taking the birthyear (index(array(element[7]))) and subtracting it from the year 2015:</p>
  
  <pre><code>for patients in range(len(listPatients)):
      YOB=listPatients[patients][8][6]+listPatients[patients][8][7]
      +listPatients[patients][8][8]+listPatients[patients][8][9]
  age= currentYear-int(YOB)
  story4=patients.append(age)
  </code></pre>
  
  <p>The output says I can't append a integer. What can I do?</p>