Subset of list in python

Subsets in Python

Suppose we have a set of numbers; we have to generate all possible subsets of that set. This is also known as power set. So if the set is like [1,2,3], then the power set will be [[], [1], [2], [3], [1,2], [1,3], [2,3], [1,2,3]]

• We will solve this using recursive approach. So if the recursive method name is called solve(), and this takes the set of numbers (nums), temporary set (temp), res and index
• The solve() function will work like below −
• if index = length of nums, then create a list same as temp, and insert into res and return
• temp[index] := 0
• solve(nums, temp, res, index + 1)
• temp[index] := 1
• solve(nums, temp, res, index + 1)
• The main function will be like below −
• res := an empty list
• create temp list of size same as the nums, and fill this with 0
• call solve(nums, temp, res, 0)
• main_res := an empty list
• for all lists in temp_res
  • temp := empty list
  • for i := 0 to length of lists
    • if lists[i] = 1, then insert nums[i] into temp

    Let us see the following implementation to get better understanding −

    Example

    class Solution(object): def subsets(self, nums): temp_result = [] self.subsets_util(nums,[0 for i in range(len(nums))],temp_result,0) main_result = [] for lists in temp_result: temp = [] for i in range(len(lists)): if lists[i] == 1: temp.append(nums[i]) main_result.append(temp) return main_result def subsets_util(self,nums,temp,result,index): if index == len(nums): result.append([i for i in temp]) #print(temp) return temp[index] = 0 self.subsets_util(nums,temp,result,index+1) temp[index] = 1 self.subsets_util(nums, temp, result,index + 1) ob1 = Solution() print(ob1.subsets([1,2,3,4]))

    Input

    Output

    [[], [4], [3], [3, 4], [2], [2, 4], [2, 3], [2, 3, 4], [1], [1, 4], [1, 3], [1, 3, 4], [1, 2], [1, 2, 4], [1, 2, 3], [1, 2, 3, 4]]

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    How do you get all the subsets of a list in Python?

    How do you get all the subsets of a list in Python?

    Use itertools. combinations() to find all subsets of a set

    1. a_set =
    2. data = itertools. combinations(a_set, 2)
    3. subsets = set(data)
    4. print(subsets)

    How do you make all subsets in Python?

    Python has itertools. combinations(iterable, n) which Return n length subsequences of elements from the input iterable. This can be used to Print all subsets of given size of a set.

    How do you generate all subsets of a set?

    Here we are generating every subset using recursion. The total number of subsets of a given set of size n = 2^n. Space Complexity : O(n) for extra array subset….1. Backtracking Approach

    1. Choose one element from input i.e. subset[len] = S[pos].
    2. Recursively form subset including it i.e. allSubsets(pos+1, len+1, subset)

    How do you write a subset in Python?

    Python Set issubset() The issubset() method returns True if all elements of a set are present in another set (passed as an argument). If not, it returns False. Set A is said to be the subset of set B if all elements of A are in B . Here, set A is a subset of B .

    How do I find my superset?

    A proper superset of a set A is a superset of A that is not equal to A. In other words, if B is a proper superset of A, then all elements of A are in B but B contains at least one element that is not in A. For example, if A= then B= is a proper superset of A.

    Where is strict superset in Python?

    HackerRank Python – Check Strict Superset

    1. # Enter your code here. Read input from STDIN. Print output to STDOUT.
    2. A = set(input(). split())
    3. n = int(input())
    4. check = True.
    5. for i in range(n):
    6. s = set(input(). split())
    7. if (s&A != s) or (s == A):
    8. check = False.

    What is a strict superset?

    A strict superset has at least one element that does not exist in its subset. Example. Set is a strict superset of set .

    What is the symbol of proper superset?

    Mathematics Set Theory Symbols

    Symbol	Symbol Name	Meaning
    A ⊃ B	proper superset / strict superset	set A has more elements than set B
    A ⊇ B	superset	set A has more elements or equal to the set B
    Ø	empty set	Ø =
    P (C)	power set	all subsets of C

    What is superset example?

    A set A is a superset of another set B if all elements of the set B are elements of the set A. For example, if A is the set and B is the set , then A⊃B but B⊅A. Since A contains elements not in B, we can say that A is a proper superset of B.

    What exercises should you superset?

    Here are some examples of exercises you could pair together for supersets: Chest press and back row. Glute bridge and front lunge (hamstrings and quads) Biceps curl and triceps kickback….For example:

    How do you super set?

    Put most simply, a superset is when you perform one set of an exercise and then immediately switch to another exercise and do another set. You can pair two exercises that work the same muscle group or two exercises that pair complementary muscle groups.

    Can I do supersets everyday?

    Yes and by yes, I mean you can set up a superset workout program so that each work out is a superset workout. However, the same principles apply to supersets as non-superset workouts. For instance, you wouldn’t want to do a full body superset workout every day. 3 times a week is fine, just not every day of the week.

    Can you build muscle with supersets?

    The main reasons for using supersets are to build muscle, increase muscular endurance, and to save time. Supersets for muscle building occur in the eight to 12 rep range using moderately heavy weights while endurance athletes will use light weights for 15-30 reps.

    Does superset increase size?

    Compound supersets can produce amazing muscle growth in a very short period of time since you are performing two compound exercises, one after another. Since this type of superset allows your muscle to rest for a short period, it will allow you to build strength, as well as size.

    Why are supersets bad?

    Furthermore, the more supersetting you do in your workouts, the more fatigued you’re going to be, which will impair your performance in your heavy lifting and reduce the total amount of mechanical tension you can subject your muscles to for the rest of your workout.

    Can you do too many supersets?

    Improper programming of supersets can lead to increased incidence of traumatic and overuse injuries, while overtraining specific muscle groups and soft tissues alike. Review the simple tips below before you program your training – it could make the difference between personal records and injuries.

    Do supersets help burn fat?

    Still, while supersets might be more time efficient, they don’t necessarily lead to a greater total calorie burn than traditional strength training. In one small study, published last year in The Journal of Strength and Conditioning Research, 10 men performed a six-exercise superset workout.

    What are the best supersets?

    SUPERSET #1: OPPOSING MUSCLE GROUPS – BICEPS & TRICEPS

    • DUMBBELL INCLINE TRICEPS EXTENSION.
    • DUMBBELL SPIDER CURL.
    • STRAIGHT-ARM PUSHDOWN.
    • FACE PULL.
    • UCV RAISE.
    • CAVALIERE CROSSOVER.
    • DUMBBELL ‘L’ RAISE.
    • DUMBBELL OVERHEAD PRESS.

    Can you superset any exercises?

    You can use supersets in the broadest sense and stack any two moves to simply cut down on your workout time. If you’re extra savvy, you can select complementary exercises that target opposing muscle groups in order to make your workout more efficient.

    What happens if you don’t rest between sets?

    The time that you take between sets is a crucial variable of resistance training. Rest periods can be tweaked to complement changes to rep count and intensity. Too little rest between sets could mean submaximal muscle growth. Too much rest can take you out of the zone and waste precious gym time.

    How much should I rest between sets?

    The rest interval is the time spent resting between sets that allow the muscle to recover. The rest period between sets is usually in the range of 30 seconds to two minutes. Some exercises also have short rests between reps.

    Should I superset the same muscle?

    1 One of the best options is by using supersets. Exercises in supersets can be for the same muscle group—such as doing an overhead shoulder press followed by a lateral raise—which is the most intense way to use supersets. Because you’re working the same muscle group, those muscle fibers get more time under tension.

    Do drop sets build muscle?

    Drop sets are an effective way to promote muscle hypertrophy, or gains in muscle size, and muscular endurance. They also help if you’re working out under a time crunch.

    How many reps is a superset?

    Superset reps for building muscle If your goal is to increase muscle mass (hypertrophy), then aim for 8-12 reps of each exercise (16-24 total reps of two back-to-back exercises). Let’s take two exercises you could do in a superset; the bench press and the lat pulldown.

    How many exercises should I do per muscle?

    Or muscular endurance? In general, a range of 1 to 3 sets of an exercise can provide benefits based on your goals, and even just one exercise per muscle group can give you results. To gain strength, it’s best to stick with a few foundational exercises and concentrate your reps and sets there.

    Are 2 sets enough?

    Some trainers recommend doing anywhere from three to five strength-training sets for maximum muscle gain, while others say that one set per exercise is just as good as two or more. If you’re really going for strength gains, muscle endurance, and muscle growth, multiple sets have an advantage.

    Is doing 5 sets too much?

    If you’re trying to build muscle and get bigger, doing sets of 3 or sets of 5 or sets of 10 will ALL help you get bigger, if you’re eating enough to get bigger! If you’re trying to lose weight, it doesn’t matter if you do sets of 15 or sets of 5 if you are consistently overeating by 1,000 calories a day.

    Is 3 sets enough for hypertrophy?

    The first set of your first exercise will be responsible for up to 80% of the muscle stimulation you are going to achieve in the workout. Preferably you should do 3-5 sets in total to make sure you are getting that 100%, meaning maximum hypertrophy.

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    Check if one list is subset of other in Python

    In text analytics and various other fields of data analytics it is often needed to find if a given list is already a part of a bigger list. In this article we will see the python programs to implement this requirement.

    With all

    We use a for loop to check if every element of the smaller list is present in the bigger list. The all function ensures each evaluation returns true.

    Example

    Alist = ['Mon','Tue', 5, 'Sat', 9] Asub_list = ['Tue',5,9] # Given list and sublist print("Given list ",Alist) print("Given sublist",Asub_list) # With all if (all(x in Alist for x in Asub_list)): print("Sublist is part of bigger list") else: print("Sublist is not part of bigger list") # Checkign again Asub_list = ['Wed',5,9] print("New sublist",Asub_list) if (all(x in Alist for x in Asub_list)): print("Sublist is part of bigger list") else: print("Sublist is not part of bigger list")

    Output

    Running the above code gives us the following result −

    Given list ['Mon', 'Tue', 5, 'Sat', 9] Given sublist ['Tue', 5, 9] Sublist is part of bigger list New sublist ['Wed', 5, 9] Sublist is not part of bigger list

    With subset

    In this approach we convert the lists into set and use the subset functions to validate if the small list is part of the bigger list or not.

    Example

    Alist = ['Mon','Tue', 5, 'Sat', 9] Asub_list = ['Tue',5,9] # Given list and sublist print("Given list ",Alist) print("Given sublist",Asub_list) # With all if(set(Asub_list).issubset(set(Alist))): print("Sublist is part of bigger list") else: print("Sublist is not part of bigger list") # Checkign again Asub_list = ['Wed',5,9] print("New sublist",Asub_list) if(set(Asub_list).issubset(set(Alist))): print("Sublist is part of bigger list") else: print("Sublist is not part of bigger list")

    Output

    Running the above code gives us the following result −

    Given list ['Mon', 'Tue', 5, 'Sat', 9] Given sublist ['Tue', 5, 9] Sublist is part of bigger list New sublist ['Wed', 5, 9] Sublist is not part of bigger list

    Using intersection

    The intersection function find the common elements between two sets. In this approach we convert the lists into sets and apply the intersection function. If the result of intersection is same as the sublist then we conclude the sublist is part of thelist.

    Example

    Alist = ['Mon','Tue', 5, 'Sat', 9] Asub_list = ['Tue',5,9] # Given list and sublist print("Given list ",Alist) print("Given sublist",Asub_list) # With all if(set(Alist).intersection(Asub_list)== set(Asub_list)): print("Sublist is part of bigger list") else: print("Sublist is not part of bigger list") # Checkign again Asub_list = ['Wed',5,9] print("New sublist",Asub_list) if(set(Alist).intersection(Asub_list)== set(Asub_list)): print("Sublist is part of bigger list") else: print("Sublist is not part of bigger list")

    Output

    Running the above code gives us the following result −

    Given list ['Mon', 'Tue', 5, 'Sat', 9] Given sublist ['Tue', 5, 9] Sublist is part of bigger list New sublist ['Wed', 5, 9] Sublist is not part of bigger list

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