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Learn Dictionaries (2/2) | Other data types
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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:

CountryAreaPopulation
Brazil8515767212559417
India31663911380004385
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)
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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:

NameAgeHeight
John41185
Michelle35165

Solution

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SectionΒ 5. ChapterΒ 8
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book
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:

CountryAreaPopulation
Brazil8515767212559417
India31663911380004385
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)
copy
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:

NameAgeHeight
John41185
Michelle35165

Solution

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

close

Awesome!

Completion rate improved to 2.33

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