To summarize: itemgetter keeps the execution fully on the C level, so it's as fast as possible. The type order cannot be logical, so be careful here. Python program to Sort a List of Dictionaries by the Sum of their Values. Here, data are ordered by types and then ordered between same types. that's a lot more work for the interpreter. Python Program to extract Dictionaries with given Key from a list of dictionaries. Use the sorted () Function to Sort a List of Dictionaries in Python This function takes an existing list and returns a sorted list.

sorted(A, key = lambda user: (user, user))įrom the comments: bet there is not a big difference between the two, but itemgetter avoids a bit of overhead because it extracts the keys and make the tuple during a single opcode( CALL_FUNCTION), while calling the lambda will have to call the function, load the various constants(which are other bytecodes) finally call the subscript ( BINARY_SUBSCR), build the tuple and return it. the sorting of a list of dictionaries by the value of the dictionary the sorting of a list of dictionaries by their ID's the sort order when sorting dictionaries This specific case, especially including duplicates has not been discussed yet.

Sorted python list of dictionaries