Accessing dictionary value by index in python

Question

I would like to get the value by key index from a Python dictionary  Is there a way to get it something like this   dic      value at index   dic ElementAt index    where index is an integer

User · Answer

Let us take an example of dictionary   numbers     first  0   second  1   third  3    When I did   numbers values   index    I got an error  dict values  object does not support indexing  When I did   numbers itervalues     to iterate and extract the values it is also giving an error  dict  object has no attribute  iteritems   Hence I came up with new way of accessing dictionary elements by index just by converting them to tuples   tuple numbers items    key index  value index    for example    tuple numbers items    0  0  gives  first    if u want to edit the values or sort the values the tuple object does not allow the item assignment  In this case you can use   list list numbers items    index

User · Answer

If you really just want a random value from the available key range  use random choice on the dictionary s values  converted to list form  if Python 3     gt  gt  gt  from random import choice  gt  gt  gt  d    1   a   2   b   3   c    gt  gt  gt  gt  choice list d values

User · Answer

While you can do  value   d values   index    It should be faster to do  value   next  v for i  v in enumerate d itervalues    if i    index     edit  I just timed it using a dict of len 100 000 000 checking for the index at the very end  and the 1st values   version took 169 seconds whereas the 2nd next   version took 32 seconds   Also  note that this assumes that your index is not negative

User · Answer

Standard Python dictionaries are inherently unordered  so what you re asking to do doesn t really make sense   If you really  really know what you re doing  use  value at index   dic values   index    Bear in mind that adding or removing an element can potentially change the index of every other element

[python] Accessing dictionary value by index in python

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