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List through a flat length input

J
juvenalb last edited by

n=int(input()) s=ln(list(input()) #длина введенного списка (почему-то стак не пропускает оператор) while s<n:
I don't understand what I've written, but as far as I'm concerned, tell me how to put a fixed dime on the list, i.e. to determine the condition of the end of the entry and to accept an unlimited number of elements before this condition comes.
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Bogopo last edited by
I guess that's how you do it.
```
n = int(input())
data = list(map(int, input().split()))[:n]
```
or if the length of the list was less than the given number, it may be:
```
n = int(input())
data = (list(map(int, input().split())) + [0]*n)[:n]
```
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In the product list arrangement to each element adds two more properties:$scope.productos = [ { id:1, nombre:"Negro Azulado 1", existencia: 20000, precio: 45, cantidad: 0, //De esta manera total: 0 //De esta manera }, { id:2, nombre:"Negro Luminoso 2", existencia: 20000, precio: 45, cantidad: 0, //De esta manera total: 0 //De esta manera } ]; And in the ng-model of the input establishes as follows ng-model="producto.cantidad" When you call the method purchase() with ng-change$scope.comprar = function (_item){ _item.ocultar = true; _item.total = _item.cantidad * _item.precio; $scope.carrito.push(_item); } The following code:<td>Total de pedido: {{obtenerTotal()}}</td> Change it for this:<td>Total de pedido: {{precioTotal | currency}}</td> And you will create the following function on the controller to calculate the Order$scope.total = function(){ $scope.precioTotal = 0; $scope.productos.map(function(producto){ $scope.precioTotal += producto.total; }); }
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Receipt of list index list on condition
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[i for i, v in enumerate(my_list) if v > 10]
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I recommend that when you believe the inputs inside a loop you assign an incremental to the id for example id="boxMat1", id="boxMat2", etc., Since the id must be unique, mentioned this I explain the code to you, we get the checkbox tags (that is already clear), so we run through them with a for, then through id We added a .addEventListener type change, we get the id of the selected checbox and we make it split() to get only the number (although you can add attributes data-* to not occupy it), we keep in a variable idNum position [1] that would be the number we require, then we validate if the check is checked enabled input type number - 2005 document.getElementById(num${idNum}).disabled = false; And if it's not checado, we disable it. I hope that's what you need, any doubt let her know.var check = document.getElementsByName('mat[]'); for(var i = 0; i < check.length; i++){ let checks = check[i].id; document.getElementById(checks).addEventListener('change',function(){ let idCheck = this.id.split('check'); let idNum = idCheck[1]; console.log(idNum); if(this.checked){ document.getElementById(`num${idNum}`).disabled = false; }else{ document.getElementById(`num${idNum}`).disabled = true; } }) }<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <input type="checkbox" id="check1" name="mat[]" value="1"> <input type="checkbox" id="check2" name="mat[]" value="2"> <input type="number" id="num1" name="unidadM[]" disabled> <input type="number" id="num2" name="unidadM[]" disabled>
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It's not good for you to store in variables instead of the context and then add those variables? If you need them in the context you can do it from the variables.
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The split method will return the list of divided conditions. It's possible to any "," "," Once the conditions have been met, variable "a" will be a list.a = input("").split(" ") print(a)
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Convert to list a string previously made from a list of lists
Software Programming • python list • • charlenef

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If the client and server are programmed in Python, and the objects you are sending are native types of Python (integer, strings, list and/or dictionaries), you can use the serialization and de-serialycipon benefits of the library jsonincluded in Python.As an example, the following applies to the case of use you describe in the question:import json tenemos una lista arbitraria en python lista = [1, 2, 'foo', {'name': 'john'}, [9, 10]] la transformamos a string lista_serializada = json.dumps(lista) imprimimos los valores para checkear que este OK print(type(lista_serializada)) <class 'str'> print(lista_serializada) '[1, 2, "foo", {"name": "john"}, [9, 10]]' notar que esto es un string transformamos este string a una lista nuevamente nueva_lista = json.loads(lista_serializada) para checkear que es consistente print(lista == nueva_lista) True This works on the composition of these guys as well, so when you mention a matrix, I imagine you mean a list of lists (since the parent type doesn't exist in Python), so it would work for your case.
Find the element index on the list
Software Programming • python list • • Demir

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import numpy as np List1=[['aaa', '9', 'ddd', '10'], ['ddd', '12', 'hhh', '3'], ['uuu', '8', 'hhh', '15']] List2=[['uuu', 0, 0, 0, 0], ['hhh', 0, 0, 0, 0], ['ddd', 0, 0, 0, 0], ['aaa', 0, 0, 0, 0]] res = [f"{x[0]}: {np.argwhere(np.array(List1)==x[0]).tolist()}" for x in List2] res:['uuu: [[2, 0]]', 'hhh: [[1, 2], [2, 2]]', 'ddd: [[0, 2], [1, 0]]', 'aaa: [[0, 0]]'] UPDATEIf you need to get the subscriptions you need to work on your condition, you can do this:idx = [y[0] for y in [(np.argwhere(np.array(List2)[:,0]==x[0])).flatten() for x in List1 if int(x[1]) < int(x[3])]] and then work with the second list according to the selected indices. For example:for i in idx: List2[i][1]="foo" (Get this List2):[['uuu', 'foo', 0, 0, 0], ['hhh', 0, 0, 0, 0], ['ddd', 0, 0, 0, 0], ['aaa', 'foo', 0, 0, 0]]
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Establish a list of dates between the interval list
Software Programming • python python 3.x pandas • • Burma

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If you have dates like datetime, it's pretty easy to do.df["range"] = df.apply(lambda x: pd.date_range(start=x["start"], end=x["end"], freq="D") .date.tolist(), axis=1) Then you will have: start end range 0 2020-02-14 2020-02-16 [2020-02-14, 2020-02-15, 2020-02-16] 1 2020-03-08 2020-03-10 [2020-03-08, 2020-03-09, 2020-03-10] 2 2020-03-17 2020-03-19 [2020-03-17, 2020-03-18, 2020-03-19] 3 2020-04-12 2020-04-19 [2020-04-12, 2020-04-13, 2020-04-14, 2020-04-1... 4 2020-05-01 2020-05-03 [2020-05-01, 2020-05-02, 2020-05-03]
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How quickly do you read the CSV file and get all the necessary data out of it?
Software Programming • python csv • • Kadir

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I don't think you'll be able to significantly speed up your own reading of the file, but it's possible to streamline the code somehow:import pandas as pd df = pd.read_csv("mouse.csv") df["time"] = pd.to_datetime(df["time"]) print((df.iloc[-1, 0] - df.iloc[0, 0])) Let's get:0 days 00:00:00.251000 Or you can just translate it into seconds:print((df.iloc[-1, 0] - df.iloc[0, 0]).total_seconds()) 0.251
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I'm very sorry that you've come to the same challenge me a few months ago.There are no decisions in the box.For formalsets, you can try. https://blog.bullgare.com/2011/01/%D0%B2%D0%BB%D0%BE%D0%B6%D0%B5%D0%BD%D0%BD%D1%8B%D0%B5-%D1%84%D0%BE%D1%80%D0%BC%D1%81%D0%B5%D1%82%D1%8B-%D0%B2-django/ or https://micropyramid.com/blog/how-to-use-nested-formsets-in-django/ (maybe the same, look at the example of the code) or write it yourself, pointing out the prefixes of the embedded pests. A lot of JS code will be for dynamic addition.With regard to the different sets of fields, I can recommend either submerging them through AJAX and inserting them into HTML, requesting the type of shape (more forms) or doing as ModelForm and collecting the shape dynamically. The fields and their type can be stored in the DB in JSON (in principle, everything can be stored, but I think you need to work with these objects later, so for each model, your own table and their forms in JSON in a separate table)That's a good one, but an ancient version for dynamic shape. https://habr.com/ru/post/46845/ )In principle, your task can be solved by writing many JSs and AJAX, constantly changing the forms and sending them to AJAX for their URL to preserve them.
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How do I determine the length of the list in MirageSQL?
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https://github.com/mirage-sql/mirage/wiki/2WaySQL#3if-else-end : IF English https://commons.apache.org/proper/commons-ognl/ expressions.In general, I think you can write the same as general Java./*IF !employeeList.isEmpty()*/ AND employeeId IN /*employeeList*/('101001') /*END*/
What does typing module TypeVar covariant and contravariant mean?
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Imagine we're programming a game. Our game has several three-dimensional objects, including cardboard boxes. A way to represent this in code would be like this:class Figura3D(): pass class Cubo(Figura3D): pass class CaixaDePapelao(Cubo): pass There is a base class to represent all three-dimensional figures, then a class to represent all cubic three-dimensional figures, then a class to specifically represent a cardboard box, which is obviously a cubic three-dimensional figure.Our game needs a class responsible for rendering things on the screen, which would be more or less like this:T = TypeVar('T') class Renderizador(Generic[T]): def init(self, x: T): pass Understand that class Renderizador has a generic type argument T, for he must be able to render anything.The code of our game still has a function that specifically serves to render cubes.def executar_render(render: Renderizador[Cubo]): pass It receives a cube renderer and uses it to draw the cube on the screen.Now, knowing that an object of the class CaixaDePapelao is also a Cubo (due to inheritance), it makes sense to pass a Renderizador[CaixaDePapelao] for the above function, correct?No!The following code is refused by mypy:render_caixa_de_papelao = Renderizador(CaixaDePapelao()) executar_render(render_caixa_de_papelao) error: Argument 1 to "execute_render" has incinera type "Renderer[CaixaDePapelao]"; expected "Renderer[Cubo]"That happens because TypeVar('T') by default is invariant. This means your subclasses and superclasses are not compatible with it. However, if we change the statement to:T = TypeVar('T', covariant=True) The error disappears and mypy accepts cardboard box renderers to be used instead of cube renderers.In short:A guy invariant does not accept subclasses or superclassesA guy covariant accepts subclasses, but not superclassesA guy contravariant accepts superclasses, but not subclassesNow the question remains: What are the guys who accept both subclasses and superclasses?If they call bivariants and are not supported by Python.
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Insanity in python
Software Programming • python • • juvenalb

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Python programmers have a imagination of the python is all an object.When the programmer attributes something to the variable, it does not assign the same value, it refers to the object. In your example, an object with meaning is being created. 5, takes his address (groan, very rude) and is assigned to the variable. a♪ Then there is a facility in which it is stored 10the address and the address is assigned to a♪ Next, object with value 5 Lives as long as his garbage collector doesn't decide to send him to the dance.Once again, all Python-surgeries are about objects. When they say mutable or immutable If you don't, you''ll have to do it because of the properties of the objects!Maybe you just don't understand the concept of "indicator" and therefore bring analogy from the world of people: When you take a smartphone and call Ana to talk, you're not talking to a phone number or a smartphone, you're talking to Ana. The phone number is just an "indicator" on Ana. And the smartphone is a variable that keeps an index on Ana. And to gain access to Ana, you use the variable in which Ani's number is stored and only then you get access to it.
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Extend from list to other list
Software Programming • python • • derk

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You can correlate the list elements lista1 and lista2 through function https://docs.python.org/3.3/library/functions.html#zip . In addition, you can concatenate lists using the operator +. So if you create a new list - using https://pt.wikipedia.org/wiki/Compreens%C3%A3o_de_lista - in which each element is e1[:2] + e2 + e1[-1:] you get what you want:>>> lista1 = [['carlos','10','cenouras','carro','agora'],['duarte','34','couves','bus','agora']] >>> lista2 = [['11:30', '12:00'],['13:00', '13:30']] >>> listaNova = [e1[:2] + e2 + e1[-1:] for e1, e2 in zip(lista1, lista2)] >>> listaNova [['carlos', '10', '11:30', '12:00', 'agora'], ['duarte', '34', '13:00', '13:30', 'agora']] (Note I used it e1[-1:] instead of simply e1[-1] because I want one List with an element, and not only the element)If you want to make "extensive" (i.e. using loops, append and extend), it would be like this:listaNova = [] for e1, e2 in zip(lista1, lista2): item = [] listaNova.append(item) # append acrescenta um item na lista item.extend(e1[:2]) # extend acrescenta os itens do argumento na lista item.extend(e2) item.append(e1[-1]) # como é um único elemento, pode usar append Finally, if you want to avoid zip, can make a normal loop, on the list indexes (care, make sure the lists are equal size):listaNova = [] for i in range(len(lista1)): # i vai de 0 a "tamanho da lista" - 1 item = [] listaNova.append(item) e1 = lista1[i] e2 = lista2[i] item.extend(e1[:2]) item.extend(e2) item.append(e1[-1]) But note how the code gets extended, while the first method does the same thing using a single line of code... As you master these concepts (mainly that of understanding lists, one of the most powerful features of language) get used to using them instead of more verbal constructions, when appropriate.
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Python set up a list of regular lists
Software Programming • python python 3.x list • • shizuka

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What's important is that 2 be short.Just walk through one element and pick the couples.Mode 1:arr = [73, 54, 73, 94, -73, -7, -73, 47] res = [[arr[i], arr[i + 1]] for i in range(0, len(arr), 2)] print(res) Mode 2:res = [arr[i:i + 2] for i in range(0, len(arr), 2)] Mode 3:res = list(zip(arr[::2], arr[1::2]))

List through a flat length input

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