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Dictionaries (2/2)

Let's consider some useful methods for dictionaries:

len(d) - returns length of dictionary d (number of pairs key:value);
min(d), max(d) - minimum or maximum of keys of dictionary d;
d.copy() - returns copy of dictionary d;
d.items() - returns all pairs (key, value) in dictionary d;
d.keys() - returns all keys of dictionary d;
d.values() - returns all values of dictionary d;
d[k] = e - set value e to key k.

For example, traditionally, let's update our dictionary so it will contain two more countries:

Country	Area	Population
Brazil	8515767	212559417
India	3166391	1380004385


              123456
            
# old dictionary
countries_dict = {'USA': (9629091, 331002651), 'Canada': (9984670, 37742154), 'Germany': (357114, 83783942)}
# update dictionary with countries
countries_dict["Brazil"] = (8515767, 212559417)
countries_dict["India"] = (3166391, 1380004385)
print(countries_dict)

Task

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Update your dictionary with people so it will contain information for the next two people and then print the whole dictionary:

Name	Age	Height
John	41	185
Michelle	35	165

Solution

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Section 5. Chapter 8

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Dictionaries (2/2)

Let's consider some useful methods for dictionaries:

len(d) - returns length of dictionary d (number of pairs key:value);
min(d), max(d) - minimum or maximum of keys of dictionary d;
d.copy() - returns copy of dictionary d;
d.items() - returns all pairs (key, value) in dictionary d;
d.keys() - returns all keys of dictionary d;
d.values() - returns all values of dictionary d;
d[k] = e - set value e to key k.

For example, traditionally, let's update our dictionary so it will contain two more countries:

Country	Area	Population
Brazil	8515767	212559417
India	3166391	1380004385


              123456
            
# old dictionary
countries_dict = {'USA': (9629091, 331002651), 'Canada': (9984670, 37742154), 'Germany': (357114, 83783942)}
# update dictionary with countries
countries_dict["Brazil"] = (8515767, 212559417)
countries_dict["India"] = (3166391, 1380004385)
print(countries_dict)

Task

Swipe to start coding

Update your dictionary with people so it will contain information for the next two people and then print the whole dictionary:

Name	Age	Height
John	41	185
Michelle	35	165

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 5. Chapter 8

Switch to desktop for real-world practiceContinue from where you are using one of the options below