Contenido del Curso
Learn Python from Scratch
Learn Python from Scratch
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:
# create two-dimensional list countries_mod = [['USA', 9629091], ['Canada', 9984670], ['Germany', 357114], ['Brazil', 8515767], ['India', 3166391]]
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.
# 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])
Tarea
- Recreate list (name as people) with people names and ages into two-dimensional.
- Print the information for second person
- Print age of fifth person.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
| John | 41 |
| Michelle | 35 |
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones¡Gracias por tus comentarios!
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:
# create two-dimensional list countries_mod = [['USA', 9629091], ['Canada', 9984670], ['Germany', 357114], ['Brazil', 8515767], ['India', 3166391]]
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.
# 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])
Tarea
- Recreate list (name as people) with people names and ages into two-dimensional.
- Print the information for second person
- Print age of fifth person.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
| John | 41 |
| Michelle | 35 |
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones¡Gracias por tus comentarios!
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:
# create two-dimensional list countries_mod = [['USA', 9629091], ['Canada', 9984670], ['Germany', 357114], ['Brazil', 8515767], ['India', 3166391]]
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.
# 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])
Tarea
- Recreate list (name as people) with people names and ages into two-dimensional.
- Print the information for second person
- Print age of fifth person.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
| John | 41 |
| Michelle | 35 |
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones¡Gracias por tus comentarios!
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:
# create two-dimensional list countries_mod = [['USA', 9629091], ['Canada', 9984670], ['Germany', 357114], ['Brazil', 8515767], ['India', 3166391]]
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.
# 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])
Tarea
- Recreate list (name as people) with people names and ages into two-dimensional.
- Print the information for second person
- Print age of fifth person.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
| John | 41 |
| Michelle | 35 |
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opcionesCambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones