use list comprehension in python l = [3, 11, 4, 9, 1, 23, 5, 11] indexes = [index for index in range(len(l)) if l[index] == 11] output: [1, 7] use numpy for finding the matching indices. import numpy as np l = [3, 11, 4, 9, 1, 23, 5, 11] np_array = np.array(l) item_index = … Read more
You can use nested replicate :: Int -> a -> [a]: makeBoard :: Num a => Int -> Int -> [[a]] makeBoard h w = replicate h $ replicate w 1 replicate takes thus an Int and an element a and generates a list [a] that contains n times that element. So the second replicate … Read more
You can create a separate method: for task in self.tasks: task = randomTask() … def randomTask(): while True: num1 = random.randint(0, 10) num2 = random.randint(0, 10) if num1 + num2 <= 10: break return “{} + {} =”.format(num1, num2) solved I can’t make this in to a for loop
First the expression is called list comprehension. Its used to create a new list as you iterate another list/iterable. A good scenario is [value for item in range(integer)] New array is generated [], the values of that array will depend on the value from the expression above on each iteration . Meaning if you do … Read more
Your item =…. line, as it stands, just associates a new object with the name item in the function’s namespace. There is no reason why this operation would change the content of the list object from which the previous value of item was extracted. Here is a listing that changes a list in-place: import random … Read more
Well the loop seems to be this one (at the end of the code): for i,j in itertools.combinations([a,b,c],2): all_diffs=alldiffs(i,j) total=count_total(i,j) zero=count_zero(all_diffs) total=np.array(total) union=map(sub,total,zero) zero=np.array(zero).tolist() union=np.array(union).tolist() union=[list(x) for x in union] sim=[[float(aaa) / bbb for (aaa, bbb) in itertools.izip(aa, bb)] \ for (aa, bb) in itertools.izip(zero, union)] sim_comb=sum(sim,[]) sum_of_sim=sum(sim_comb) number_sum=len(sim_comb) ave=sum_of_sim/number_sum one_ave=1-ave print one_ave One possible … Read more
You need to add a reference to System.DirectoryServices to be able to use this function… Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim Users As List(Of String) = GetLocalUsers(“localhost”) For Each User As String In Users MessageBox.Show(User) Next End Sub Private Function GetLocalUsers(ByVal MachineName As String) As List(Of String) Dim WinNt As … Read more
According to the official documentation, writelines writes a list of lines to a file. str(A) does not create a “list of lines” – obviously, when you print it to the screen – so the very first step should be to create a list-of-lines: A=[ [‘-‘, ‘A’, ‘B’, ‘C’, ‘D’, ‘E’], [‘A’, ‘0’, ‘5’, ‘6’, ‘7’, … Read more
Here’s a list comprehension that is equivalent to your nested loops: a = [[i * j for j in range(0, y)] for i in range(0, x)] 2 solved How to use list comprehension for the following code? [duplicate]
You’d still use enumerate(); you didn’t show how you used it but it but it solves your issue: for index, (value,num) in enumerate(sorted_list, start=1): print(“{}.\t{:<5}\t{:>5}”.format(index, value,num)) I folded your str.ljust() and str.rjust() calls into the str.format() template; this has the added advantage that it’ll work for any value you can format, not just strings. Demo: … Read more
The following is a much shorter and solution, and might be preferable – main_list = [True, True, False, False, True, True, True, True, True, False] def my_diff(my_list): return [1 if my_list[0] else 0] + [y – x for x, y in zip(my_list[:-1], my_list[1:])] solution = [i for i, x in enumerate(my_diff(main_list)) if x == 1] … Read more
I think you may have to be more specific and provide a comparison function so that your list can be sorted. Took the code below from the following site. Hope it helps: https://wiki.python.org/moin/HowTo/Sorting >>> student_tuples = [ (‘john’, ‘A’, 15), (‘jane’, ‘B’, 12), (‘dave’, ‘B’, 10), ] >>> sorted(student_tuples, key=lambda student: student[2]) # sort by … Read more
Visual Studios 2017 – Cannot implicitly convert type ‘System.Collections.Generic.List’ to ‘System.Collections.Generic.List’ solved Visual Studios 2017 – Cannot implicitly convert type ‘System.Collections.Generic.List‘ to ‘System.Collections.Generic.List‘
An optimal solution for this would have you traverse the entire list of volumes only once, or O(n). The loops you mentioned were doing some multiple of that. There may be a way to do this with Linq to attain O(n) efficiency, but without more testing I do not know. However, you can get O(n) … Read more
From your description, I think you want something like this: >>> a = 1 >>> b = 2 >>> c = [3, 4, 5] >>> d = [6, 7, 8] >>> for cx, dx in zip(c, d): for item in (a, b, cx, dx): print(item) print(“—“) 1 2 3 6 — 1 2 4 7 … Read more