Write simple Python application

I need to parse attached XML file using Python and create a single dictionary.

Requirements:
1) Parse attached XML file
2) Output dict must contain following string keys/values:

{ 112233 : HandsOnExperience1}
{223344 : HandsOnExperience2}
{1000001 : HandsOnExperience3}
{1000002 : HandsOnExperience4}

3) Identical keys (already in dict) must be reported and skipped.
4) Number of keys (in the input XML) could 1M, so app must be performant.
5) Print output dictionary (keys and values) + dict size (number of records)