Jesus_jbs's questions

I have the following list:

result = [{"{'rueda-pinchada', 'rueda-repuesto'}", " {'eje', 'maletero', 'suelo'}"}]

and I want to get the following:

result = [{'rueda-repuesto', 'rueda-pinchada'}, {'maletero', 'eje', 'suelo'}]

As you can see, the second list contains two sets, while the first contains a set with two strings that "mimic" a set. The idea is to flatten the list to get the two strings, and with the list of strings, convert these to set. Remaining a list of sets.

I have tried to flatten it as follows:

aux = [constante for x in result for constante in x]

and has resulted in:

['{', "'", 'r', 'u', 'e', 'd', 'a', '-', 'p', 'i', 'n', 'c', 'h', 'a', 'd', 'a', "'", ',', ' ', "'", 'r', 'u', 'e', 'd', 'a', '-', 'r', 'e', 'p', 'u', 'e', 's', 't', 'o', "'", '}', ' ', '{', "'", 'e', 'j', 'e', "'", ',', ' ', "'", 'm', 'a', 'l', 'e', 't', 'e', 'r', 'o', "'", ',', ' ', "'", 's', 'u', 'e', 'l', 'o', "'", '}']

My intention is that when clicking on a button, an alert appears with the option Confirm or Cancel, and that in case of Confirm, the forwarding process is carried out as if it did not have the label onclick. I have the following code written in a jsp:

    <spring:url value="/vendedores/eliminarArticulo/{articuloId}" var="eliminarArticuloUrl">
        <spring:param name="articuloId" value="${articulo.id}"/>
    </spring:url>
    
    <a href="${fn:escapeXml(eliminarArticuloUrl)}">
        <button onclick="alerta()" class="btn btn-default" type="submit">Dar de baja</button>
    </a>

And the function in JavaScript:

function alerta() {
    var opcion = confirm("¿Seguro que desea dar de baja el artículo?");
    if (opcion) {
    
    }
}

The question is, what should I put in ifit so that when Accepting directly it does the function of button, that is, if Accepts directly, it calls hrefwhich in this case would be /vendedores/eliminarArticulo/{articuloId}, articleId being a parameter that is taken from a variable that receives the page.

I have the travis.yml file configured as follows:

 dist: trusty 
 language: java 
 jdk: oraclejdk8
 services:
   - mysql before_install:
   - mysql -e 'CREATE DATABASE petclinic;' 
 script: mvn test -Dspring-boot.run.profiles=mysql-travis
 
 addons:   
 sonarcloud:
 organization: ""
     token:   
         secure: "" 
 script:
    - mvn clean verify sonar:sonar -Pcoverage -Dsonar.projectKey = name

But it doesn't run for me. However, if I remove the addons part down it does run. I clarify that where the quotes namego and the corresponding variables and tokens go. I don't know if the problem is due to the structure scheme that I follow, the idea is to include SonarCloud when analyzing together with Travis CI.

I have the parts table and the LíneasFacturasProvedores table, both are joined by the OID_P attribute. My question is if there is any way for the PurchasePrice attribute of the Pieces table to be equal to the UnitPrice attribute of the SupplierInvoiceLines table if they are the same piece, that is, if they have the same OID_P.

CREATE TABLE Piezas(
    OID_P               INTEGER,
    nombre              VARCHAR2(50) UNIQUE NOT NULL,
    cantidad            INTEGER NOT NULL,
    precioCompra        NUMBER(5,2) NOT NULL,
    precioVenta         NUMBER(5,2) AS (precioCompra * 1.2),
    numAlmacén          INTEGER NOT NULL,
    CONSTRAINT cantidadPieza CHECK(cantidad >= 0),
    PRIMARY KEY         (OID_P),
    FOREIGN KEY         (numAlmacén) REFERENCES Almacenes
);

CREATE TABLE LíneasFacturasProveedores(
    OID_LFP             INTEGER,
    cantidad            INTEGER NOT NULL,
    precioUnitario      NUMBER(5,2) NOT NULL,
    numFactura          INTEGER NOT NULL,
    OID_P               INTEGER NOT NULL,
    CONSTRAINT cantidadFacProv CHECK(cantidad > 0),
    PRIMARY KEY         (OID_LFP),
    FOREIGN KEY         (numFactura) REFERENCES FacturasProveedores,
    FOREIGN KEY         (OID_P) REFERENCES Piezas
);

Hi, I have the following code that performs the calculation of a combinational number:

int combinacional(int_pair par) {
int i,j;
int tabla[par.a+1][par.b+1] ;

if(par.b == 0 || par.b == par.a) {
   return 1;
}
else if (par.b == 1 || par.b == (par.a - 1)) {
    return par.a;
}
else {
   for (i=0; i<=par.a; i++) {
     tabla[i][0] = 1;
   }

   for (i=1; i<=par.a; i++) {
     tabla[i][1] = i;
   }

   for (i=2; i<=par.b; i++) {
     tabla[i][i] = 1;
   }

   for (i=3; i<=par.a;i++) {
     for (j=2; j<par.a; j++) {
       if(j<=par.b) {
         tabla[i][j] = tabla[i-1][j-1] + tabla[i-1][j];
       }
     }
   }
   }

   return tabla[par.a][par.b];
}

In it I make use of "int_pair" which would be an equivalent to a tuple in which the first or second value can be selected, I also create a two-dimensional array to be able to store the values ​​of the Pascal triangle and take the result of this at the end . The error comes when displaying the output, for this I use the following:

void test() {
list enteros = leerFichero4("ficheros/entradaE4.txt");

for (int i = 0; i < enteros.size; i++) {
    int_pair tupla = *(int_pair*) list_get(&enteros, i);
    int result = combinacional(tupla);
    printf("Entrada = %s; ", int_pair_tostring(&tupla, mem));
    printf("Salida = %i\n", result);
    printf("========================================\n");
}
}

int main() {
   test();
}

This shows me the following:

Entrada = (10,1); Salida = 10
========================================
Entrada = (9,2); Salida = 36
========================================
Entrada = (8,3); Salida = 7105
========================================
Entrada = (7,4); Salida = -996404052
========================================
Entrada = (6,5); Salida = 6
========================================

The first two outputs and the last one are correct. However, the others must be 56 and 35 and pointers to memory locations appear, I imagine. I guess it's some pointer error but I can't find it.

I am new to java and I need a LocalDate variable to obtain it in String format but only the day of the month and the month. Ex:

LocalDate fecha = LocalDate.of(2020, Month.SEPTEMBER, 1);

I need to get 0109. I have tried to do the following:

System.out.println("Código ->" + fecha.getDayOfMonth()
             + "" + fecha.getMonthValue());

But it gives me 19, I suppose that it will be necessary to use some format, thanks in advance.

I want to create a function that I pass an argument to and that searches a csv file for strings that match the argument. The file has the following form:

    Rank,Name,Platform,Year,Genre,Publisher,NA_Sales,EU_Sales,JP_Sales,Other_Sales,Global_Sales
1,Wii Sports,Wii,2006,Sports,Nintendo,41.49,29.02,3.77,8.46,82.74  
2,Super Mario Bros.,NES,1985,Platform,Nintendo,29.08,3.58,6.81,0.77,40.24  
3,Mario Kart Wii,Wii,2008,Racing,Nintendo,15.85,12.88,3.79,3.31,35.82  
4,Wii Sports Resort,Wii,2009,Sports,Nintendo,15.75,11.01,3.28,2.96,33  
5,Pokemon Red/Pokemon Blue,GB,1996,Role-Playing,Nintendo,11.27,8.89,10.22,1,31.37
6,Pokemon Diamond/Pokemon Pearl,DS,2006,Role-Playing,Nintendo,6.42,4.52,6.04,1.37,18.36
7,Grand Theft Auto V,PS3,2013,Action,Take-Two Interactive,7.01,9.27,0.97,4.14,21.4

The function I have tried to create would be the following:

def filtra_por_saga(juegos, saga):
    result = {i.name for i in juegos if i.name.split()[0] == saga}
    return result

Where games is the read file and saga would be the string to filter on. I work with namedtuple and the function should return the full name of the game if any part of it matches the given argument. Ex: If saga is "Grand theft autos", the function must return all the names of videogames that contain that part in it ("Grand theft autos IV","Grand theft autos V",etc). The problem with the function I've created is that it only works with non-composite arguments; ex: (saga = "Pokemon", returns "Pokemon Red/Pokemon Blue", etc).

The function to test is the following:

def test_filtra_por_saga(juegos, saga):
    print(filtra_por_saga(juegos, saga))
test_filtra_por_saga(juegos, "Pokemon")

The comparison string will vary through 'test_filter_by_saga(games, " ")'. Thanks in advance.

I have the following definition to create a function that displays an image in grayscale:

def escala_grises(imagen):
''' Transforma una imagen en color a grados de grises

ENTRADA: 
   - imagen: matriz de píxeles -> [[(float, float, float)]]
SALIDA: 
   - matriz de píxeles con la imagen de entrada en escala de grises -> [[float]]

Toma como entrada una matriz de píxeles RGB, y produce como salida una
matriz de píxeles con intensidades en escala de grises (un único valor por
cada pixel).

Para convertir una imagen en color a escala de grises hay que aplicar
los siguientes pesos para integrar los tres canales de color en un único
valor de intensidad:
    - Rojo:  0.2989
    - Verde: 0.5870
    - Azul:  0.1140
'''

The argument imagenis an array extracted from a ".jpeg" file using an array. Ex: [[[82, 119, 171], [91, 128, 180], [85, 122, 174], [84, 121, 173], [88, 125, 177], [84, 121, 173], [84, 121, 173], [85, 122, 174]]].

I'm guessing it's a 3D array since the method shapereturns (330, 600, 3), the 3 I think comes from the number of colors present in the "RGB" file.

The question is, how to modify the array so that the average color intensities match [0.2989, 0.5870, 0.1140], considering that I can only use the following imported modules:

from matplotlib import pyplot as plt
import numpy as np

-Reply to abulafia regarding the comments Apparently, I shouldn't use métodosthe library numpysince I'm not supposed to have given them. So I tried to recreate what you have told me using the following code:

filtro = []
for i in imagen:
    for r,g,b in i:
        rojo = r*0.2989
        verde = g*0.5870
        azul = b*0.1140
        numero = [int(rojo + verde + azul)]
        filtro.append(numero)
return filtro

But it gives a blank image with the error:

ValueError: Image size of 1x198000 pixels is too large. It must be less than 2^16 in each direction.

Attached Test of the grayscale function and the function to display the image:

def test_escala_grises(imagen):
    grises = escala_grises(imagen)
    muestra_imagen(grises, cmap='gray')
    guarda_imagen('../img/grises.jpeg', grises, cmap='gray')

def muestra_imagen(imagen, cmap=None):
    imagen = np.array(imagen, dtype='uint8')
    plt.imshow(imagen, cmap=cmap)
    plt.show()

I have the following code:

numeros = [-1.4, 2.3, 5.27, -3.5, 2.9, 3.12]
lista = [(x > 0) - (x < 0) for x in numeros]
print(lista)

And it returns the following:

[-1, 1, 1, -1, 1, 1]

The question is what function it fulfills (x > 0) - (x < 0)and how I could interpret it. Thanks in advance.

Taking into account that it partidosis a list with sublists that contain tuples. Ex:partidos = [[(datetime.date(2000, 9, 9), 'FC Barcelona', 2, 'Málaga CF', 1)], [(datetime.date(2000, 9, 9), 'RC Deportivo', 2, 'Athletic Club', 0)], [(datetime.date(2000, 9, 9), 'Real Sociedad', 2, 'R. Racing C.', 2)]]

I have tried to build the following function to do what you ask:

def partidos_por_fecha(partidos, inicio=None, fin=None):
    ''' Filtra los partidos jugados en un rango de fechas

    ENTRADA: 
    - partidos: lista de partidos -> [Partido(datetime.date, str, int, str, int)]
    - inicio: fecha inicial del rango -> datetime.date
    - fin: fecha final del rango -> datetime.date
    SALIDA: 
    - lista de partidos seleccionados -> [Partido(datetime.date, str, int, str, int)] 

    Se devuelven aquellos partidos que se han jugado entre las fechas inicio
    y fin. Ambos parámetros serán objetos date del módulo datetime.
    Si inicio es None, se incluirán los partidos desde el principio de
    la serie, y si fin es None se inlcuirán los partidos hasta el último de
    la serie.
    '''
    if inicio == None:
        inicio = partidos[0][0][0]
    elif fin == None:
        fin = partidos[-1][-1][0]
    elif inicio == None and fin == None:
        inicio = partidos[0][0][0]
        fin = partidos[-1][-1][0]
    else:
        inicio == inicio
        fin == fin

    result = []
    for i in partidos:
        for fecha, local, goles_local, visitante, goles_visitante in i:
            if fecha >= inicio and fecha <= fin:
                result.append((fecha, local, goles_local, visitante, goles_visitante))
    return result

This function is executed by the following code:

def test_partidos_por_fechas(partidos):
    inicio = datetime(2007, 9, 15).date()
    fin = datetime(2008, 7, 1).date()
    print(len(partidos_por_fecha(partidos, inicio, fin)))
    print(len(partidos_por_fecha(partidos, inicio, None)))
    print(len(partidos_por_fecha(partidos, None, fin)))
    print(len(partidos_por_fecha(partidos, None, None)))

test_partidos_por_fechas(partidos)

The error that I get after executing the function is: TypeError: '<=' not supported between instances of 'datetime.date' and 'NoneType'And it tells me that it is in the ifone that is inside the loops for. I don't understand how after filtering the arguments inicioand finwhen they are Nonebefore the loops for, I still get variables Noneto compare withdatetimes

I would like to get some solution to make the function work. Sorry if there are indentation errors in the code having passed it here and thanks in advance.

I have created the following function:

def partidos_por_equipos(partidos, equipos):

    result = []
    for i in partidos:
        for fecha, local, goles_local, visitante, goles_visitante in i:
            if local in equipos or visitante in equipos:
                result.append((fecha, local, goles_local, visitante, goles_visitante))
    return result   

I have had to use two loops forbecause "matches" is a list that contains several sublists and these contain tuples. Ex:

partidos = [[(datetime.date(2000, 9, 9), 'FC Barcelona', 2, 'Málaga CF', 1), 
(datetime.date(2000, 9, 9), 'RC Deportivo', 2, 'Athletic Club', 0)]]

The question is whether there is any function so that "matches" stays as a single list of tuples or directly accesses the tuples without having to access each sublist. And if there is no way, to know if you can save lines of code in the function that I have created. Thanks in advance.

I would like to understand the operation and creation of "keys" or "lambdas" that can condition the functions max()or min(), applied to lists, dictionaries or tuples.

An example of what I mean would be:

def pais_mas_bienes(registros, tipo_bien='Cultural'):
    ''' Calcula el país con mayor número de bienes de un tipo dado
        Devuelve una tupla con el número de bienes y el nombre del país
        
        ENTRADA:
        - registros: lista de tuplas con información de bienes -> [(id, name, year, category, country)]
        - tipo_bien: el tipo de bienes para el que se realizará la operación -> str
        
        SALIDA:
        - Tupla con el número de bienes y el nombre del país -> (int, str)
    '''
    tuplas = list(indexa_por_paises(registros, tipo_bien).items())
    filtro = max(tuplas, key = lambda x: len(x[1]))
    contador = filtra_por_pais_bienes(registros, filtro[0], tipo_bien)
    result = (contador, filtro[0])
    return result

And the helper functions used:

def indexa_por_paises(registros, tipo_bien):
    result = {}
    for i in registros:
        if i[3] == tipo_bien and i[4] in result:
            result[i[4]] += [i]
        if i[3] == tipo_bien and i[4] not in result:
            result[i[4]] = [i]
    return result

def filtra_por_pais_bienes(registros, pais, tipo_bien):
    result = [i for i in registros if i[3]==tipo_bien and i[4]==pais]
    return len(result)

based on the following data:

restaurantes = [('Burger King', 'MA', 'Chicopee', '1284 Memorial Dr', '1020', '42.1927', '-72.5763'), ("Taco Bell", 'MA', 'Chicopee', '1606 Memorial Dr', '1020', '42.201117596', '-72.574102772'), ('Pizza Hut', 'MA', 'Easthampton', '113 Northampton St', '1027', '42.278666', '-72.671148'), ("Jack in the Box", 'MA', 'Holyoke', '285 Maple St', '1040', '42.20578', '-72.61053')]

I have managed to make the following function that returns the percentage of "x" restaurant brand in the restaurants variable:

def porcentaje_burger_king(restaurante, name):
    nombres = [nombre for nombre, _, _, _, _, _, _ in restaurantes if nombre == name]
    result = (len(nombres)/len(restaurantes))*100
    return result

Which is executed with:

print(porcentaje(restaurantes, "Burger King")) #(0.25)

The problem is that I can't create a function that returns the percentage of each brand that is in the restaurant variable. I have tried with the following function, which gives wrong data:

def porcentajes_por_nombres(restaurantes):
    nombres = [nombre for nombre, _, _, _, _, _, _ in restaurantes]
    porcentajes = []
    indice = 0
    while indice < len(nombres):
        porcentaje_x = (len(nombres[indice])/len(restaurantes))*100
        porcentajes.append(porcentaje_x)
        indice +=1
    return porcentajes

print(porcentajes_por_nombres(restaurantes)) #Devuelve [275.0, 225.0, 225.0, 375.0] en vez de [0.25, 0.25, 0.25, 0.25]

I need the result in the form of a list, so that I can later use the zip function with the variables names and percentages, thanks in advance.