Dictionary order


#1

In Python when we insert key/value pair to the dictionary, how it is stored ? Is it stores randomly or any order?


#2

its random, depending in how much depth you want to know:

https://www.laurentluce.com/posts/python-dictionary-implementation/

however, for pyton3.6+ are ordered:

if you want to implement ordered dictionary in earlier version of python, this is possible:

https://docs.python.org/2/library/collections.html#collections.OrderedDict


#3

It should never be assumed that dictionaries are ordered. Period.

If your want an ordered dictionary. then order one. Don’t expect the environment to order one up for you.


#4

If you want to process the items in a dictionary in a particular order, you can use a list or other object to manage the keys. For example, if you want to output the keys in alphabetical order, this will do it …

key_list = prices.keys()
key_list.sort()

for key in key_list:
  print key
  print "price: %d" % prices[key]
  print "stock: %d" % stock[key]


#5

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