Pyyhkäise näyttääksesi valikon

Lists (2/3)

There are several operations available for manipulating lists, same as for string, such as:

len() - length of list (i.e. number of elements);
list1 + list2 - concatenation (both must be lists);
list1 * n - n copies of list1;
list.append(x) - add x (one element!) to the end of list (x can not be list) - this one rewrites your list;
list.extend((x, y, ...)) - add x,y, ... to the end of list - also rewrites your list;
list.copy() - creates a copy of your list;
list.count(x) - counts number of x in list.

For example, we can modify a bit our list with several more countries.


              12345678910
            
countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114]
# list with new countries
countries_new = ["Brazil", 8515767, "India", 3166391]

# add new data (list) to our list using concatenation
print(countries + countries_new)

# using list method
countries.extend(("Brazil", 8515767, "India", 3166391))
print(countries)

Tehtävä

Swipe to start coding

Modify your last list with new data. Experiment with both methods and print the result.

Name	Age
John	41
Michelle	35

Ratkaisu

Vaihda työpöytään todellista harjoitusta vartenJatka siitä, missä olet käyttämällä jotakin alla olevista vaihtoehdoista

Oliko kaikki selvää?

Kiitos palautteestasi!

Osio 5. Luku 2

Kysy tekoälyä

Kysy mitä tahansa tai kokeile jotakin ehdotetuista kysymyksistä aloittaaksesi keskustelumme

Lists (2/3)

There are several operations available for manipulating lists, same as for string, such as:

len() - length of list (i.e. number of elements);
list1 + list2 - concatenation (both must be lists);
list1 * n - n copies of list1;
list.append(x) - add x (one element!) to the end of list (x can not be list) - this one rewrites your list;
list.extend((x, y, ...)) - add x,y, ... to the end of list - also rewrites your list;
list.copy() - creates a copy of your list;
list.count(x) - counts number of x in list.

For example, we can modify a bit our list with several more countries.


              12345678910
            
countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114]
# list with new countries
countries_new = ["Brazil", 8515767, "India", 3166391]

# add new data (list) to our list using concatenation
print(countries + countries_new)

# using list method
countries.extend(("Brazil", 8515767, "India", 3166391))
print(countries)

Tehtävä

Swipe to start coding

Modify your last list with new data. Experiment with both methods and print the result.

Name	Age
John	41
Michelle	35

Ratkaisu

Vaihda työpöytään todellista harjoitusta vartenJatka siitä, missä olet käyttämällä jotakin alla olevista vaihtoehdoista

Oliko kaikki selvää?

Kiitos palautteestasi!

Osio 5. Luku 2

Vaihda työpöytään todellista harjoitusta vartenJatka siitä, missä olet käyttämällä jotakin alla olevista vaihtoehdoista