import os
from gcore import Gcore

client = Gcore(
    api_key=os.environ.get("GCORE_API_KEY"),  # This is the default and can be omitted
)
subnet = client.cloud.networks.subnets.update(
    subnet_id="b39792c3-3160-4356-912e-ba396c95cdcf",
    project_id=1,
    region_id=1,
)
print(subnet.id)

package main

import (
	"context"
	"fmt"

	"github.com/G-Core/gcore-go"
	"github.com/G-Core/gcore-go/cloud"
	"github.com/G-Core/gcore-go/option"
)

func main() {
	client := gcore.NewClient(
		option.WithAPIKey("My API Key"),
	)
	subnet, err := client.Cloud.Networks.Subnets.Update(
		context.TODO(),
		"b39792c3-3160-4356-912e-ba396c95cdcf",
		cloud.NetworkSubnetUpdateParams{
			ProjectID: gcore.Int(1),
			RegionID:  gcore.Int(1),
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", subnet.ID)
}

curl --request PATCH \
  --url https://api.gcore.com/cloud/v1/subnets/{project_id}/{region_id}/{subnet_id} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "dns_nameservers": [
    "8.8.4.4",
    "1.1.1.1"
  ],
  "enable_dhcp": true,
  "gateway_ip": "192.168.10.1",
  "host_routes": [
    {
      "destination": "10.0.3.0/24",
      "nexthop": "10.0.0.13"
    }
  ],
  "name": "some_name",
  "tags": {
    "my-tag": "my-tag-value",
    "my-tag-to-remove": null
  }
}
'

const options = {
  method: 'PATCH',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    dns_nameservers: ['8.8.4.4', '1.1.1.1'],
    enable_dhcp: true,
    gateway_ip: '192.168.10.1',
    host_routes: [{destination: '10.0.3.0/24', nexthop: '10.0.0.13'}],
    name: 'some_name',
    tags: {'my-tag': 'my-tag-value', 'my-tag-to-remove': null}
  })
};

fetch('https://api.gcore.com/cloud/v1/subnets/{project_id}/{region_id}/{subnet_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.gcore.com/cloud/v1/subnets/{project_id}/{region_id}/{subnet_id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'dns_nameservers' => [
        '8.8.4.4',
        '1.1.1.1'
    ],
    'enable_dhcp' => true,
    'gateway_ip' => '192.168.10.1',
    'host_routes' => [
        [
                'destination' => '10.0.3.0/24',
                'nexthop' => '10.0.0.13'
        ]
    ],
    'name' => 'some_name',
    'tags' => [
        'my-tag' => 'my-tag-value',
        'my-tag-to-remove' => null
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

HttpResponse<String> response = Unirest.patch("https://api.gcore.com/cloud/v1/subnets/{project_id}/{region_id}/{subnet_id}")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"dns_nameservers\": [\n    \"8.8.4.4\",\n    \"1.1.1.1\"\n  ],\n  \"enable_dhcp\": true,\n  \"gateway_ip\": \"192.168.10.1\",\n  \"host_routes\": [\n    {\n      \"destination\": \"10.0.3.0/24\",\n      \"nexthop\": \"10.0.0.13\"\n    }\n  ],\n  \"name\": \"some_name\",\n  \"tags\": {\n    \"my-tag\": \"my-tag-value\",\n    \"my-tag-to-remove\": null\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.gcore.com/cloud/v1/subnets/{project_id}/{region_id}/{subnet_id}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Patch.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"dns_nameservers\": [\n    \"8.8.4.4\",\n    \"1.1.1.1\"\n  ],\n  \"enable_dhcp\": true,\n  \"gateway_ip\": \"192.168.10.1\",\n  \"host_routes\": [\n    {\n      \"destination\": \"10.0.3.0/24\",\n      \"nexthop\": \"10.0.0.13\"\n    }\n  ],\n  \"name\": \"some_name\",\n  \"tags\": {\n    \"my-tag\": \"my-tag-value\",\n    \"my-tag-to-remove\": null\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "available_ips": 250,
  "cidr": "192.168.13.0/24",
  "created_at": "2019-06-13T13:58:12+0000",
  "creator_task_id": "5cc890da-d031-4a23-ac31-625edfa22812",
  "dns_nameservers": [
    "8.8.8.8",
    "8.8.4.4"
  ],
  "enable_dhcp": true,
  "gateway_ip": "192.168.13.1",
  "has_router": false,
  "host_routes": [],
  "id": "b39792c3-3160-4356-912e-ba396c95cdcf",
  "ip_version": 4,
  "name": "subnet_3",
  "network_id": "b30d0de7-bca2-4c83-9c57-9e645bd2cc92",
  "project_id": 1337,
  "region": "Luxembourg 1",
  "region_id": 7,
  "tags": [
    {
      "key": "my-tag",
      "read_only": false,
      "value": "my-tag-value"
    }
  ],
  "task_id": null,
  "total_ips": 253,
  "updated_at": "2019-06-13T13:58:12+0000"
}