Question

Please break down this python code into steps on how to do it.

def membership(sequence, value):

if value in sequence:
return value
if [value] in sequence:
return [value]
if [[value]] in sequence:
return [[value]]

a_list = ['a', ['a'], [['a']]]
print(membership(a_list, 'a'))

Answer 1

Hi, I hope you are doing well.

This is the original code:

def membership(sequence, value): #declaring function
    if value in sequence: #checking condition and if value found return value
        return value
    if [value] in sequence:#checking condition and if value found return [value]
        return [value]
    if [[value]] in sequence:#checking condition and if value found return [[value]]
        return [[value]]

a_list = ['a', ['a'], [['a']]] #creating a list
print(membership(a_list, 'a')) #calling and printing the value of the function

By breaking the code we can check the value that will be printed.

Step 1:

def membership(sequence, value): #declaring function
    if value in sequence: #checking condition and if value found return value
        return value

a_list = ['a', ['a'], [['a']]] #creating a list
print(membership(a_list, 'a')) #calling and printing the value of the function

This is how thw program will execute and gives tha output the value will store 'a'and than check if 'a' is present in sequence where sequence is a_list which is passed as a parameter in membership function.

Step 2:

def membership(sequence, value): #declaring function
    if [value] in sequence:#checking condition and if value found return [value]
        return [value]

a_list = ['a', ['a'], [['a']]] #creating a list
print(membership(a_list, 'a')) #calling and printing the value of the function

This is how thw program will execute and gives tha output the value will store 'a'and than check if ['a'] is present in sequence where sequence is a_list which is passed as a parameter in membership function.

Step 3:

def membership(sequence, value): #declaring function
    if [[value]] in sequence:#checking condition and if value found return [[value]]
        return [[value]]

a_list = ['a', ['a'], [['a']]] #creating a list
print(membership(a_list, 'a')) #calling and printing the value of the function

This is how thw program will execute and gives tha output the value will store 'a'and than check if [['a']] is present in sequence where sequence is a_list which is passed as a parameter in membership function.

This is how the final program will execute and print the output:

NOTE: Here only a is printed because it just checks the first if statement and skips other if statements but if we want to execute the below statements to than we need to change if into elif than it will be executed.