Course Content
Learn Python from Scratch
Learn Python from Scratch
Lists (1/3)
List - is one of the data structures in Python. It allows storing inside itself variables of different types, such as numbers, strings, tuples, dictionaries... (which will be discussed later).
To create a list, use [] brackets and put inside them variables/values you want to store in the list. Also, you can convert one variable into a list (this variable type has to be iterable, like string, list, or tuple).
For example, we can create a list with countries' names and their population.
# create list with countries and their areas countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114] print(countries)
The indexation of elements is the same as for strings, i.e. the very first element has index 0. For example, let's get information about Canada: name is in the third position (which means the index is 2) and area in the fourth (index 3), so we need to write 2:4 (right limit is not inclusive, as you remember).
# elements from 2 to 3 in our list countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114] print(countries[2:4])
Task
Create variable people and store the names of people with their ages. Then print your list.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
Task
Create variable people and store the names of people with their ages. Then print your list.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
Switch to desktop for real-world practiceContinue from where you are using one of the options belowEverything was clear?
Lists (1/3)
List - is one of the data structures in Python. It allows storing inside itself variables of different types, such as numbers, strings, tuples, dictionaries... (which will be discussed later).
To create a list, use [] brackets and put inside them variables/values you want to store in the list. Also, you can convert one variable into a list (this variable type has to be iterable, like string, list, or tuple).
For example, we can create a list with countries' names and their population.
# create list with countries and their areas countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114] print(countries)
The indexation of elements is the same as for strings, i.e. the very first element has index 0. For example, let's get information about Canada: name is in the third position (which means the index is 2) and area in the fourth (index 3), so we need to write 2:4 (right limit is not inclusive, as you remember).
# elements from 2 to 3 in our list countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114] print(countries[2:4])
Task
Create variable people and store the names of people with their ages. Then print your list.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
Task
Create variable people and store the names of people with their ages. Then print your list.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
Switch to desktop for real-world practiceContinue from where you are using one of the options belowEverything was clear?
Lists (1/3)
List - is one of the data structures in Python. It allows storing inside itself variables of different types, such as numbers, strings, tuples, dictionaries... (which will be discussed later).
To create a list, use [] brackets and put inside them variables/values you want to store in the list. Also, you can convert one variable into a list (this variable type has to be iterable, like string, list, or tuple).
For example, we can create a list with countries' names and their population.
# create list with countries and their areas countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114] print(countries)
The indexation of elements is the same as for strings, i.e. the very first element has index 0. For example, let's get information about Canada: name is in the third position (which means the index is 2) and area in the fourth (index 3), so we need to write 2:4 (right limit is not inclusive, as you remember).
# elements from 2 to 3 in our list countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114] print(countries[2:4])
Task
Create variable people and store the names of people with their ages. Then print your list.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
Task
Create variable people and store the names of people with their ages. Then print your list.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
Switch to desktop for real-world practiceContinue from where you are using one of the options belowEverything was clear?
List - is one of the data structures in Python. It allows storing inside itself variables of different types, such as numbers, strings, tuples, dictionaries... (which will be discussed later).
To create a list, use [] brackets and put inside them variables/values you want to store in the list. Also, you can convert one variable into a list (this variable type has to be iterable, like string, list, or tuple).
For example, we can create a list with countries' names and their population.
# create list with countries and their areas countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114] print(countries)
The indexation of elements is the same as for strings, i.e. the very first element has index 0. For example, let's get information about Canada: name is in the third position (which means the index is 2) and area in the fourth (index 3), so we need to write 2:4 (right limit is not inclusive, as you remember).
# elements from 2 to 3 in our list countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114] print(countries[2:4])
Task
Create variable people and store the names of people with their ages. Then print your list.
| Name | Age |
| Alex | 23 |
| Noah | 34 |
| Peter | 29 |
Switch to desktop for real-world practiceContinue from where you are using one of the options belowSwitch to desktop for real-world practiceContinue from where you are using one of the options below