.get instead of [key] for dictionary iterations

Dictionaries are great data-types for storing values with an attribute field known as the key , in so-called key-value pairs . When extracting key-value pairs from dictionaries, avoid running into KeyError exceptions with the .get method instead of the more traditional [key] method. The .get method provides a default value if the key is not present.

In line 6-10 our program stops running because of the KeyError exception, but in line 11-14 our program continues, using the default 'undefined' string that is set in line 12 as the second argument of the .get method.

When you have the possibility of assigning a default value for accessing key-value pairs in a dictionary, always try to use the .get method to avoid your program from stopping prematurely, especially when in production.