How to declare and add items to an array in Python

Question

I m trying to add items to an array in python   I run   array        Then  I try to add something to this array by doing   array append valueToBeInserted    There doesn t seem to be a  append method for this   How do I add items to an array

User · Answer

In some languages like JAVA you define an array using curly braces as following but in python it has a different meaning   Java   int   myIntArray    1 2 3   String   myStringArray     a   b   c      However  in Python  curly braces are used to define dictionaries  which needs a key value assignment as   a  1   b  2   To actually define an array  which is actually called list in python  you can do   Python   mylist    1 2 3    or other examples like   mylist   list   mylist append 1  mylist append 2  mylist append 3  print mylist   gt  gt  gt   1 2 3

User · Answer

You can also do   array   numpy append array  value    Note that the numpy append   method returns a new object  so if you want to modify your initial array  you have to write  array

User · Answer

No  if you do   array        IN your example you are using array as a dictionary  not an array  If you need an array  in Python you use lists   array        Then  to add items you do   array append  a

User · Answer

represents an empty dictionary  not an array list   For lists or arrays  you need      To initialize an empty list do this   my list        or  my list   list     To add elements to the list  use append  my list append 12    To extend the list to include the elements from another list use extend  my list extend  1 2 3 4   my list -- gt   12 1 2 3 4    To remove an element from a list use remove  my list remove 2    Dictionaries represent a collection of key value pairs also known as an associative array or a map    To initialize an empty dictionary use    or dict    Dictionaries have keys and values  my dict     key   value    another key    0    To extend a dictionary with the contents of another dictionary you may use the update method  my dict update   third key    1     To remove a value from a dictionary  del my dict  key

User · Answer

Just for sake of completion  you can also do this   array      array     valueToBeInserted    If it s a list of strings  this will also work   array     string

User · Answer

I believe you are all wrong  you need to do    array   array   in order to define it  and then    array append   hello   to add to it

User · Answer

Arrays  called list in python  use the    notation     is for dict  also called hash tables  associated arrays  etc in other languages  so you won t have  append  for a dict    If you actually want an array  list   use   array      array append valueToBeInserted

[python] How to declare and add items to an array in Python?

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