from pprint import pprint
from MW_API import MW_API
mw_api = MW_API('YOUR_API_KEY')
res = mw_api.do_request('PUT','/template/update/format/json', {"template_id" : "T54f9518a418e2", "title" : "updated title", "htmlcode" : "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" class=\"table\"><tbody><tr><td colspan=\"2\"><img alt=\"\" src=\"${Image}\" /></td></tr><tr><td>Tag</td><td><input name=\"tag\" type=\"text\" /></td></tr><tr><td>Comment</td><td><textarea name=\"Comment\"></textarea></td></tr></tbody></table><p>&nbsp;</p>"}, {})
pprint(res)

use MW_API;
use Data::Dumper qw(Dumper);
my $mw_api = MW_API->new('api_key' => 'YOUR_API_KEY');
my $res = $mw_api->do_request('PUT', '/template/update/format/json', {
  "template_id" => "T54f9518a418e2", "title" => "updated title", "htmlcode" => "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" class=\"table\"><tbody><tr><td colspan=\"2\"><img alt=\"\" src=\"${Image}\" /></td></tr><tr><td>Tag</td><td><input name=\"tag\" type=\"text\" /></td></tr><tr><td>Comment</td><td><textarea name=\"Comment\"></textarea></td></tr></tbody></table><p>&nbsp;</p>"
});
print Dumper($res);

<?php

include "includes/RESTClient.php";
define("cAPI_KEY", "YOUR_API_KEY");
define("cAPI_URL", "https://ttv.microworkers.com/api");
$client = new RESTClient();
$client->setApiKey(cAPI_KEY);
$client->setUrl(cAPI_URL . "/template/update/format/json");
$client->setMethod("PUT");
$client->setData(array("template_id" => "T54f9518a418e2", "title" => "updated title", "htmlcode" => "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" class=\"table\"><tbody><tr><td colspan=\"2\"><img alt=\"\" src=\"\${Image}\" /></td></tr><tr><td>Tag</td><td><input name=\"tag\" type=\"text\" /></td></tr><tr><td>Comment</td><td><textarea name=\"Comment\"></textarea></td></tr></tbody></table><p>&nbsp;</p>"));
$client->execute();
$response = $client->getLastResponse();
$client->resetClient();
echo $response;
?>

using System;
using MWAPI;
using System.Collections.Specialized;

public class Test{
  public static void Main (string[] args){
    MW_API MW_API_Client = new MW_API ("YOUR_API_KEY");
NameValueCollection postData = new NameValueCollection();
    postData.Add("template_id", "T54f9518a418e2");
     postData.Add("title", "updated title");
     postData.Add("htmlcode", "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" class=\"table\"><tbody><tr><td colspan=\"2\"><img alt=\"\" src=\"${Image}\" /></td></tr><tr><td>Tag</td><td><input name=\"tag\" type=\"text\" /></td></tr><tr><td>Comment</td><td><textarea name=\"Comment\"></textarea></td></tr></tbody></table><p>&nbsp;</p>");
    
    string body = MW_API_Client.putRequest("/template/update/format/json", postData);
    Console.WriteLine (body);
  }
}

{
  "status": "ERROR",
  "message": "TTVAPI-E0004:TTVTemplate-E0010:The 'Html Code' field is required."
}

{
  "status": "ERROR",
  "message": "TTVAPI-E0004:TTVTemplate-E0000:Template id (1234) not found."
}

{
  "status": "ERROR",
  "message": "TTVAPI-E0004:TTVTemplate-E0004:No question found. Template must have at least one input question."
}