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Create an array according to index in another array in Python


Create an array according to index in another array in Python

By : akash
Date : October 19 2020, 08:10 AM
Any of those help I have an array like this: , This would be greatly facilitated (and sped up) by using numpy:
code :
import numpy as np

Y = (np.array(X) == 2).astype(int)

>>> Y
array([[0, 1, 0],
       [0, 1, 0],
       [1, 0, 0]])


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How to create a new array from an existing array such that all data of same index will be together under that index key?

How to create a new array from an existing array such that all data of same index will be together under that index key?


By : Srujana Ch
Date : March 29 2020, 07:55 AM
like below fixes the issue I've an associative array titled $_POST. This array is dynamic in nature that is it can contain any no. of elements. For your reference I've generated the $_POST array with only two elements. The content of this array is as follows:
code :
$new_array = array();
foreach ($_POST as $key => $val) {
    if (!is_array($val)) {
        $new_array[$key] = $val;
    } elseif (preg_match('/^product_id_(\d+)$/', $key, $match)) {
        $i = $match[1];
        if (isset($new_array[$i])) {
            $new_array[$i][$key] = $val;
        } else {
            $new_array[$i] = array($key => $val);
        }
    } else {
        foreach ($val as $i => $subval) {
            if (isset($new_array[$i])) {
                $new_array[$i][$key] = $subval;
            } else {
                $new_array[$i] = array($key => $subval);
            }
        }
    }
}
create associative array from db results array using array row as index

create associative array from db results array using array row as index


By : Vicky Cool
Date : March 29 2020, 07:55 AM
wish helps you This will group the results into an array, the original array is called $arr:
code :
$result = array();
foreach( $arr['results'] as $v ) {
    $result[$v->client_id][] = $v;
}
foreach( $result[$client_id] as $res ) {
    // Use the data
    echo 'Slip: ' .  $res->slip_id . "<br />\n"
        . 'Title: ' . $res->dwg_title  . "<br />\n";
}
foreach( $result as $client_id => $temp ) {
    echo 'Client_id: ' . $client_id . "<br />\n";
    foreach( $temp as $res ) {
        // Use the data
        echo 'Slip: ' .  $res->slip_id . "<br />\n"
            . 'Title: ' . $res->dwg_title  . "<br />\n";
    }
}
Python: Comparing values in one array and replacing that value in another array at the same index from the first array

Python: Comparing values in one array and replacing that value in another array at the same index from the first array


By : Pat Fillmore
Date : March 29 2020, 07:55 AM
may help you . I’m trying to take user input and compare that input to the values in array B. Should the user input match one of those values in array B, I capture the index it is at and replace array A with the user input at the same index it found it in array B. , Try this:
code :
a = [1,2,3,4]
b = [11,22,33,44]
c = input("Enter a Number: ")

for i in b:
    if c == i:
        x = b.index(i)
        print x
        a.pop(x)
        a.insert(x,c)
        break
else:
    print "Not in list b"

print a
How to create an array by using the index of other arrays in Python 2.7?

How to create an array by using the index of other arrays in Python 2.7?


By : gomdobi
Date : March 29 2020, 07:55 AM
this will help I have three arrays IDs Edges Xn, I need to create a fourth array using this information. IDs contain different IDs: , Tested work perfect
code :
IDs = ['48', '63', '77', '108', '306']
Edges = [('48', '77'), ('63', '48'), ('77', '48'), ('77', '108'), ('108', '48'), ('306', '48')]
Xn = [3.08, 4.96, 4.04, 1.68, 1.6]
Xe = []

for i in xrange(len(Edges)):
    for j in xrange(2):
        if Edges[i][j] in IDs:
            Xe.append(Xn[IDs.index(Edges[i][j])])
    Xe.append(None)

print Xe
Trying to create a loop in python that gets the user to input the length of the array index

Trying to create a loop in python that gets the user to input the length of the array index


By : PrathviRaj
Date : March 29 2020, 07:55 AM
To fix the issue you can do I'm really new to Python, and I'm trying to write a python program that asks the user how many pieces of data they have, and then the user inputs that data which goes into an array. The problem I'm running into is that I must define the length of the array for the program to work, but I want the user to define that as "x". That way, the user can put a specific amount of data into the array. , In the command
code :
odds[i] = input("Enter number ")
odds.append(input("Enter number "))
while i < x:
    ...
    i = i + 1
for __ in range(x):
    ...
x = int(input("How many iterations: "))
odds = []
for __ in range(x):
    odds.append(input("Enter number: "))     # Note: you will append strings, not numbers
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