Add to integers in a list

Question

I have a list of integers and I was wondering if it would be possible to add to individual integers in this list

User · Answer

Yes  it is possible since lists are mutable   Look at the built-in enumerate   function to get an idea how to iterate over the list and find each entry s index  which you can then use to assign to the specific list item

User · Answer

Here is an example where the things to add come from a dictionary   gt  gt  gt  L    0  0  0  0   gt  gt  gt  things to add      idx  1   amount   1     idx   2   amount   1    gt  gt  gt  for item in things to add          L item  idx       item  amount         gt  gt  gt  L  0  1  1  0    Here is an example adding elements from another list   gt  gt  gt  L    0  0  0  0   gt  gt  gt  things to add    0  1  1  0   gt  gt  gt  for idx  amount in enumerate things to add           L idx     amount       gt  gt  gt  L  0  1  1  0    You could also achieve the above with a list comprehension and zip  L       sum i  for i in zip L  things to add     Here is an example adding from a list of tuples   gt  gt  gt  things to add     1  1    2  1    gt  gt  gt  for idx  amount in things to add          L idx     amount       gt  gt  gt  L  0  1  1  0

User · Answer

fooList    1 3 348 2  fooList append 3  fooList append 2734  print fooList     1 3 348 2 3 2734

User · Answer

You can append to the end of a list   foo    1  2  3  4  5  foo append 4  foo append  8 7       print foo                1  2  3  4  5  4   8  7     You can edit items in the list like this   foo    1  2  3  4  5  foo 3    foo 3    4      print foo                1  2  3  8  5    Insert integers into the middle of a list   x    2  5  10  x insert 2  77  print x                  2  5  77  10

User · Answer

If you try appending the number like  say listName append 4     this will append 4 at last  But if you are trying to take  lt int gt  and then append it as  num   4 followed by listName append num   this will give you an error as  num  is of  lt int gt  type and listName is of type  lt list gt   So do type cast int num  before appending it

[python] Add to integers in a list

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