Data Stream in Python with Tests

Data Stream holds 13 problems (5 Easy, 5 Medium, 3 Hard). Generate any of them into the current directory with lcpy gen -n <number>.

#	Problem	Difficulty	Solution
170	Two Sum III - Data structure design	Easy	solution.py
295	Find Median from Data Stream	Hard	solution.py
346	Moving Average from Data Stream	Easy	solution.py
352	Data Stream as Disjoint Intervals	Hard	solution.py
359	Logger Rate Limiter	Easy	solution.py
362	Design Hit Counter	Medium	solution.py
642	Design Search Autocomplete System	Hard	solution.py
703	Kth Largest Element in a Stream	Easy	solution.py
901	Online Stock Span	Medium	solution.py
933	Number of Recent Calls	Easy	solution.py
1429	First Unique Number	Medium	solution.py
1472	Design Browser History	Medium	solution.py
2013	Detect Squares	Medium	solution.py