Implementer async/await

// Le ficher 'nearby.js'

// La fonction remove_accents() enleve les accents ex: bléblé -> bleble | développement -> developpement

// J'utilise le module 'request' pour envoyer une requête http

module.exports = function find_temp(url) {
        if (url === undefined) { throw new Error('No argument passed.'); }
    
        const formatedURL = remove_accents(url);
    
        console.log('Sent: ' + formatedURL);
        
        request(url, (error, response, body) => {
            
            if (error) {console.log('error at request'); console.log(error);}
            
            const obj  = JSON.parse(body);
    
            if (obj.message == 'city not found'){ console.log('city not found'); }
    
            try {
    
                const DATA = {
                    tempe_2: Math.round(obj.main.temp) || null
                };
                
                console.log(DATA.tempe_2); // Retourne la température, pas de undefined
                return DATA.tempe_2;

            } catch (error) {
                console.log('Cannot read obj.main.temp (tempe_2) proprety.');
                console.log(error);
            }
        });
    }

// Fichier 'weather.js'

// ...
// NEARBY_CITIES.f2.name est le nom d'une ville ex: Paris, Moscow..

const url2 = 'http://api.openweathermap.org/data/2.5/weather?q=' + NEARBY_CITIES.f2.name +
                    '&units=metric&appid=' + apiKey; 
                   
                    let i = find_temp(url2);
                    console.log(i) // undefined
// ...

Sent: http://api.openweathermap.org/data/2.5/weather?q=Le Pre-Saint-Gervais&units=metric&appid=APIKEY
city not found
Cannot read obj.main.temp (tempe_2) proprety.
TypeError: Cannot read property 'temp' of undefined
    at Request.request [as _callback] (C:\Users\AdminHP\Desktop\Python\wind\nearby.js:62:35)
    at Request.self.callback (C:\Users\AdminHP\Desktop\Python\wind\node_modules\request\request.js:185:22)
    at Request.emit (events.js:182:13)
    at Request.<anonymous> (C:\Users\AdminHP\Desktop\Python\wind\node_modules\request\request.js:1157:10)
    at Request.emit (events.js:182:13)
    at IncomingMessage.<anonymous> (C:\Users\AdminHP\Desktop\Python\wind\node_modules\request\request.js:1079:12)
    at Object.onceWrapper (events.js:273:13)
    at IncomingMessage.emit (events.js:187:15)
    at endReadableNT (_stream_readable.js:1081:12)
    at process._tickCallback (internal/process/next_tick.js:63:19)

{"coord":{"lon":2.4,"lat":48.89},"weather":[{"id":800,"main":"Clear","description":"clear sky","icon":"01n"}],"base":"stations","main":{"temp":16.74,"pressure":1019,"humidity":72,"temp_min":15,"temp_max":19},"visibility":10000,"wind":{"speed":2.1,"deg":360},"clouds":{"all":0},"dt":1534372200,"sys":{"type":1,"id":5610,"message":0.0041,"country":"FR","sunrise":1534308245,"sunset":1534359860},"id":3002499,"name":"Le Pre-Saint-Gervais","cod":200}

let a = request-promise(monURL)
.then((response) => {
                       
    const obj = JSON.parse(response);
    console.log('>> ' + obj.name);
                        
    return new Promise( (resolve, reject) => {
        resolve(obj.name);
     });
})
                    
a.then((x) => {
    console.log(x) // marche :)
})

// Request
function request-promise-fonction(url) {
    if (url === undefined) { throw new Error('No argument passed.'); }

    const formated_url = removeAccents(url);

    const options = {
        uri: formated_url,
    };
    
    console.log('Sent: ' + options.uri);

    request-promise(options)
    .then((response) => {
        const obj = JSON.parse(response);
        console.log('HERE!! ' + obj.name);

        return new Promise( (resolve, reject) => {
            resolve(obj.name);
        });

    }).catch((error) => {
        console.log('Error :(');
        return null;
    })
}

.....

let a = request-promise-fonction(monURL);

a.then((x) => {
    console.log(x); // Cannot read property 'then' of undefined
}

// ...

const array = [];

a.then((x) => {
    // ..
    array.push(x);
})

delay(5000).then(() => {
    console.log(array[0]); // Affiche bien le contenus de 'x'
})

// ...