How would you remove duplicate values from a list in Python?

Use a set to store unique values
Use a for loop with conditions
Use the list.remove() method
Use the list.sort() method

To remove duplicate values from a list in Python, you can convert the list to a set. Sets automatically store only unique values, so when you convert a list to a set and back to a list, duplicates are removed. Here’s an example:

my_list = [1, 2, 2, 3, 4, 4] unique_list = list(set(my_list))

The other options do not directly address the removal of duplicates.

Discuss it

How can you handle an exception for an error caused by dividing by zero in Python?

Use a for loop
Use a while loop
Use an if statement
Use a try-except block

To handle an exception for an error caused by dividing by zero in Python, you should use a try-except block. Inside the try block, you should place the code that might raise the exception, and in the except block, you can define how to handle the exception gracefully. The other options are not suitable for handling this specific exception.

Discuss it

How would you access the last element of a list stored in a variable named my_list?

my_list[-1]
my_list[0]
my_list[1]
my_list[len(my_list)]

In Python, my_list[-1] is used to access the last element of a list. my_list[0] would access the first element. my_list[1] would access the second element. my_list[len(my_list)] would cause an IndexError as the index would be out of range.

Discuss it

What would be the output of the following Python code? print(type([]))

<class 'str'>
<class 'list'>
<class 'int'>
<class 'tuple'>

The output of type([]) would be <class 'list'> because the empty square brackets [] represent an empty list, so the type() function returns <class 'list'>.

Discuss it

How to create a single string without separators from a list of multiple strings?

''.join(my_list)
', '.join(my_list)
' '.join(my_list)
'-'.join(my_list)

To create a single string from a list of multiple strings, you can use any of the options depending on the separator you want between the strings. Here’s a breakdown:

''.join(my_list) – This joins the list items into a single string with no separator between them.
', '.join(my_list) – This joins the list items into a single string with a comma and a space as separators.
' '.join(my_list) – This joins the list items into a single string with a space as the separator.
'-'.join(my_list) – This joins the list items into a single string with a hyphen as the separator.

Discuss it

Which Python built-in function would you use to convert a string into a number?

list()
int()
str()
float()
int() or float()

To convert a string into a number in Python, you can use the built-in functions int() or float(), depending on whether you want an integer or a floating-point number. The int() function is used to convert a string into an integer, while float() is used to convert a string into a float number. str() converts other data types to string and list() converts other types to list.

Discuss it