Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.
Lära Lists (3/3) | Other data types
Learn Python from Scratch

Svep för att visa menyn

book
Lists (3/3)

As we mentioned before, you can store different data types inside a list. It means you can store lists inside lists - it means you can create multidimensional arrays. Let's experiment with two-dimensional arrays.

Remember our example with countries and areas? In that list each characteristic (name and area) is equivalent in terms of location - I think you agree that it would be much better if we could get both characteristics by only one index.

To create a two-dimensional list just put a list inside another. If you will write list[1] you will get the second element which is a list. At the same time if you write both indexes list[1][1] - you will get the second element of the second list in the list. For example, let's modify our previous example:

12
# create two-dimensional list countries_mod = [['USA', 9629091], ['Canada', 9984670], ['Germany', 357114], ['Brazil', 8515767], ['India', 3166391]]
copy

Now we can easily get both countries' names and areas by only one index. For example, let's extract information for Brazil and get Germany's area.

12345678
# create two-dimensional list countries_mod = [['USA', 9629091], ['Canada', 9984670], ['Germany', 357114], ['Brazil', 8515767], ['India', 3166391]] # list about Brazil print(countries_mod[3]) # area of Germany print(countries_mod[2][1])
copy
Uppgift

Swipe to start coding

  1. Recreate list (name as people) with people names and ages into two-dimensional.
  2. Print the information for second person
  3. Print age of fifth person.
NameAge
Alex23
Noah34
Peter29
John41
Michelle35

Lösning

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 5. Kapitel 3

Fråga AI

expand
ChatGPT

Fråga vad du vill eller prova någon av de föreslagna frågorna för att starta vårt samtal

book
Lists (3/3)

As we mentioned before, you can store different data types inside a list. It means you can store lists inside lists - it means you can create multidimensional arrays. Let's experiment with two-dimensional arrays.

Remember our example with countries and areas? In that list each characteristic (name and area) is equivalent in terms of location - I think you agree that it would be much better if we could get both characteristics by only one index.

To create a two-dimensional list just put a list inside another. If you will write list[1] you will get the second element which is a list. At the same time if you write both indexes list[1][1] - you will get the second element of the second list in the list. For example, let's modify our previous example:

12
# create two-dimensional list countries_mod = [['USA', 9629091], ['Canada', 9984670], ['Germany', 357114], ['Brazil', 8515767], ['India', 3166391]]
copy

Now we can easily get both countries' names and areas by only one index. For example, let's extract information for Brazil and get Germany's area.

12345678
# create two-dimensional list countries_mod = [['USA', 9629091], ['Canada', 9984670], ['Germany', 357114], ['Brazil', 8515767], ['India', 3166391]] # list about Brazil print(countries_mod[3]) # area of Germany print(countries_mod[2][1])
copy
Uppgift

Swipe to start coding

  1. Recreate list (name as people) with people names and ages into two-dimensional.
  2. Print the information for second person
  3. Print age of fifth person.
NameAge
Alex23
Noah34
Peter29
John41
Michelle35

Lösning

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 5. Kapitel 3
Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Vi beklagar att något gick fel. Vad hände?
some-alt