Which is the easiest way to write this PHP code with Python syntax?

Question

PHP Code:

<?php

$result = [];

$input = ['Sofia 50', 'Sofia 20', 'Sofia 30', 'Varna 10', 'Varna 20'];

foreach ($input as $item) {
    $keyValuePairs = explode(' ', $item);
    $key = $keyValuePairs[0];
    $value = $keyValuePairs[1];
    if (array_key_exists($key, $result)) {
        $result[$key]['count'] += 1;
        $result[$key]['sum'] += $value;
    } else {
        $result[$key]['count'] = 1;
        $result[$key]['sum'] = $value;
    }
}

echo '<pre>';
var_dump($result);

What I tried in Python:

input_row = input_row.split(' ')
region_name = input_row[0]
region_size = input_row[1]

if region_name in result:
    result[region_name]['count'] += 1
    result[region_name]['sum'] += region_size
else:
    result[region_name]['count'] = 1
    result[region_name]['sum'] = region_size

But it doesn't work in Python.

What result I expect:

array(2) {
  ["Sofia"]=>
  array(2) {
    ["count"]=>
    int(3)
    ["sum"]=>
    int(100)
  }
  ["Varna"]=>
  array(2) {
    ["count"]=>
    int(2)
    ["sum"]=>
    int(30)
  }
}

No loop in your python code makes it a bit suspect... what is input_row there? — Federico klez Culloca
– Federico klez Culloca, Commented May 15, 2019 at 10:19
Your Python code would work if you initialize the region name dictionary in your else statement first: else: result[region_name] = {}; result[region_name]['count'] = 1 etc. — Viktor Petrov
– Viktor Petrov, Commented May 15, 2019 at 10:22
@ViktorPetrov Hmm, yeah, you are right, but why thix syntax, doesn't work result[region_name]['count'] = 1 — MorganFreeFarm
– MorganFreeFarm, Commented May 15, 2019 at 10:25

Rakesh · Accepted Answer · 2019-05-15 10:19:27Z

3

PHP to Python

input_data = ['Sofia 50', 'Sofia 20', 'Sofia 30', 'Varna 10', 'Varna 20']
result = {}

for elem in input_data:                     #Iterate each element. 
    key, value = elem.split()               #Split on space
    if key not in result:                   #Check if key exists in result
        result[key] = {'count': 0,'sum': 0}
    result[key]['count'] += 1                #Increment count
    result[key]['sum'] += int(value)         #Increment value

print(result)

Output:

{'Sofia': {'count': 3, 'sum': 100}, 'Varna': {'count': 2, 'sum': 30}}

answered May 15, 2019 at 10:19

Rakesh

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