Lære Dictionaries (1/2) | Other data types

In previous tasks, we store characteristics and names they belong to a bit equivalent. I think you agree that it would be great if we could reach information for something by its name, not finding indexes. This problem can be solved by using dictionaries - one more data type in Python.

Dictionary can be represented as key:value. It's important that keys in the dictionary can't repeat, while values can. To create dictionary use {key1: value1, key2: value2, ...} or dict(key1: value1, key2: value2, ...). Keys must be immutable (number, string, tuple).

For example, let's create dictionary with our first three countries.

Country	Area	Population
USA	9629091	331002651
Canada	9984670	37742154
Germany	357114	83783942


              123
            
# create dictionary
countries_dict = {'USA': (9629091, 331002651), 'Canada': (9984670, 37742154), 'Germany': (357114, 83783942)}
print(countries_dict)

Please note, that I placed countries' characteristics inside the tuple, as we mentioned before it greatly fits when we have some object characteristics.

Now if I want to get, for example, information for Canada, I can simply use d[key] function.


              123
            
countries_dict = {'USA': (9629091, 331002651), 'Canada': (9984670, 37742154), 'Germany': (357114, 83783942)}
# information about Canada
print(countries_dict["Canada"])

Opgave

Swipe to start coding

Create a dictionary with keys - names of people and values - their respective age and height (as a tuple). Print information for Alex.

Name	Age	Height
Alex	23	178
Noah	34	189
Peter	29	175

Løsning

Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder

Var alt klart?

Tak for dine kommentarer!

Sektion 5. Kapitel 7

single

Spørg AI

Spørg om hvad som helst eller prøv et af de foreslåede spørgsmål for at starte vores chat

For example, let's create dictionary with our first three countries.

Country	Area	Population
USA	9629091	331002651
Canada	9984670	37742154
Germany	357114	83783942


              123
            
# create dictionary
countries_dict = {'USA': (9629091, 331002651), 'Canada': (9984670, 37742154), 'Germany': (357114, 83783942)}
print(countries_dict)

Please note, that I placed countries' characteristics inside the tuple, as we mentioned before it greatly fits when we have some object characteristics.

Now if I want to get, for example, information for Canada, I can simply use d[key] function.


              123
            
countries_dict = {'USA': (9629091, 331002651), 'Canada': (9984670, 37742154), 'Germany': (357114, 83783942)}
# information about Canada
print(countries_dict["Canada"])

Opgave

Swipe to start coding

Create a dictionary with keys - names of people and values - their respective age and height (as a tuple). Print information for Alex.

Name	Age	Height
Alex	23	178
Noah	34	189
Peter	29	175

Løsning

Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder

Var alt klart?

Tak for dine kommentarer!

Sektion 5. Kapitel 7

single

Stryg for at vise menuen

For example, let's create dictionary with our first three countries.

Country	Area	Population
USA	9629091	331002651
Canada	9984670	37742154
Germany	357114	83783942


              123
            
# create dictionary
countries_dict = {'USA': (9629091, 331002651), 'Canada': (9984670, 37742154), 'Germany': (357114, 83783942)}
print(countries_dict)

Please note, that I placed countries' characteristics inside the tuple, as we mentioned before it greatly fits when we have some object characteristics.

Now if I want to get, for example, information for Canada, I can simply use d[key] function.


              123
            
countries_dict = {'USA': (9629091, 331002651), 'Canada': (9984670, 37742154), 'Germany': (357114, 83783942)}
# information about Canada
print(countries_dict["Canada"])

Opgave

Swipe to start coding

Create a dictionary with keys - names of people and values - their respective age and height (as a tuple). Print information for Alex.

Name	Age	Height
Alex	23	178
Noah	34	189
Peter	29	175

Løsning

Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder

Var alt klart?

Tak for dine kommentarer!

Dictionaries (1/2)

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Awesome!

Dictionaries (1/2)

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Awesome!

Dictionaries (1/2)

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