Added comments

weather.py

@@ -0,0 +1,16 @@
+import requests             #This library is necessary to get access to URL and its data if a web allows.
+
+'''The function is giving the temperature and short weather condition for a particular location. '''
+def weather_ask(sentence):
+    try:
+        city = sentence
+        url = 'http://api.openweathermap.org/data/2.5/weather?q=' + city + '&APPID=f7d590dc5f61801f09e17f3922567a55' #The variable city can be either from stored data (global variable) or from user input (when asking for a different location).
+        res = requests.get(url)
+        data = res.json()                   #JSON format is necessary to get the data from the website.
+        temp = data['main']['temp']         #Choose which data wants to get from the web page, in this case, it is temperature.
+        temp_C = temp - 273.15              #Making conversion from Kelvin degrees into Celsius degrees.
+        weather_description = data['weather'][0]['description']         #Weather description data is taken from web page.
+        print('Temperature is: ', round(temp_C, 1), 'degree and', weather_description)
+    except:
+        print("Invalid command this is used by typing the following: weather in [city] OR weather for [city] where [city] is replaced with the city you want to find the weather for")
+