4. Lists¶

4.1. Defining¶

>>> salary_list = [4000, 5000, 3000, 8000]
>>> print(salary_list)
[4000, 5000, 3000, 8000]

>>> type(salary_list)
<class 'list'>

>>> len(salary_list)
4

>>> 3000 in salary_list
True

salary_list.append(12000)
print(salary_list)

[4000, 5000, 3000, 8000, 12000]

salary_list.insert(1, 4500)
print(salary_list)

[4000, 4500, 5000, 3000, 8000, 12000]

salary_list = sorted(salary_list)
print(salary_list)

[3000, 4000, 4500, 5000, 8000, 12000]

print(sorted(salary_list, reverse=True))

[12000, 8000, 5000, 4500, 4000, 3000]

salary_list.extend([2800, 15000])
salary_list.sort()
print(salary_list)

[2800, 3000, 4000, 4500, 5000, 8000, 12000, 15000]

>>> retreived = salary_list.pop()
>>> print(retreived)
15000

Again we put element to the list

>>> salary_list.append(retreived)
>>> print(salary_list)
[2800, 3000, 4000, 4500, 5000, 8000, 12000, 15000]

Let’s put element which is incorrect (negative salary)

>>> salary_list.append(-300)
>>> print(salary_list)
[2800, 3000, 4000, 4500, 5000, 8000, 12000, 15000, -300]

This negative is not needed - let`s remove it:

>>> del salary_list[-1]
>>> print(salary_list)
[2800, 3000, 4000, 4500, 5000, 8000, 12000, 15000]

for salary in salary_list:
    print(salary)

salary_tuple = tuple(salary_list)
print(salary_tuple)

(2800, 3000, 4000, 4500, 5000, 8000, 12000, 15000)

>>> set_plac = set(salary_list)
>>> print(set_plac)  