python : how to disable auto sort when creating dictionary

Question

i need help for this case :

m={}
m[1]=1
m[333]=333
m[2]=2

# Result:
{1: 1, 2: 2, 333: 333}

so even when i didn\'t enter \'333\' the last,

Answer 1

Long time after this questions was posted, but just for those who land on this page, since 3.6? dictionaries preserve the order that items are added in.

Answer 2

Items stored in a dictionary do not have any inherent order. The order they are printed out is entirely down to the hash values for each of the keys and the other items in the dictionary.

Answer 3

It is not sorting. dict is not ordered at all, so you cannot influence the key order in any way. There is collections.OrderedDict in 2.7 and 3.1+, there is also standalone module for 2.4-2.6.