Commit 454fc2a

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	`1`	`+def get_bit(num, bit):`
	`2`	`+`
	`3`	`+ temp = (1 << bit)`
	`4`	`+ temp = temp & num`
	`5`	`+`
	`6`	`+ if temp == 0:`
	`7`	`+ return 0`
	`8`	`+`
	`9`	`+ return 1`
	`10`	`+`
	`11`	`+`
	`12`	`+`
	`13`	`+def find_all_subsets(nums):`
	`14`	`+`
	`15`	`+ subsets = []`
	`16`	`+`
	`17`	`+ if not nums:`
	`18`	`+ return [[]]`
	`19`	`+`
	`20`	`+ else:`
	`21`	`+ subsets_count = 2 ** len(nums)`
	`22`	`+`
	`23`	`+ for i in range(0, subsets_count):`
	`24`	`+ subset = set()`
	`25`	`+`
	`26`	`+ for j in range(0, len(nums)):`
	`27`	`+ if get_bit(i, j) == 1 and nums[j] not in subset:`
	`28`	`+ subset.add(nums[j])`
	`29`	`+`
	`30`	`+ if i == 0:`
	`31`	`+ subsets.append([])`
	`32`	`+`
	`33`	`+ else:`
	`34`	`+ subsets.append(list(subset))`
	`35`	`+`
	`36`	`+ return subsets`
	`37`	`+`
	`38`	`+`
	`39`	`+`
	`40`	`+# Time Complexity = O(2^n * n)`
	`41`	`+# Space Complexity = O(n)`
	`42`	`+`
	`43`	`+`
	`44`	`+`
	`45`	`+#################################################################`
	`46`	`+`
	`47`	`+`
	`48`	`+`
	`49`	`+def main():`
	`50`	`+ nums = [[], [2, 5, 7], [1, 2], [1, 2, 3, 4], [7, 3, 1, 5]]`
	`51`	`+`
	`52`	`+ for i in range(len(nums)):`
	`53`	`+ print(i + 1, ". Set: ", nums[i], sep='')`
	`54`	`+ subsets = find_all_subsets(nums[i])`
	`55`	`+ print(" Subsets:", subsets)`
	`56`	`+ print("-"*100)`
	`57`	`+`
	`58`	`+`
	`59`	`+if __name__ == '__main__':`
	`60`	`+ main()`
	`61`	`+`
	`62`	`+`

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