class to show implementation of custom sequence of list - Python

class to show implementation of custom sequence of list

class CustomList:
    """
    This is the space to do documentation related to class.
    """
    def __init__(self):
        self.list_ = [1,2,3,4]

    def __len__(self):
        return len(self.list_)

    def __getitem__(self, i):
        if isinstance(i, int):
            if i<0:
                i = len(self.list_) + i

            if i<0 or i>=len(self.list_):
                raise IndexError('Invalid Input')
            else:
                return self.list_[i]

class to show implementation of custom sequence of tuple

class CustomTuple:
    """
    This is the space to do documentation related to class.
    """
    def __init__(self):
        self.list_ = (1,2,3,4)

    def __len__(self):
        return len(self.list_)

    def __getitem__(self, i):
        if isinstance(i, int):
            if i<0:
                i = len(self.list_) + i

            if i<0 or i>=len(self.list_):
                raise IndexError('Invalid Input')
            else:
                return self.list_[i]

generate intereger random number between user choice

def gen_ran_int_number(lower, upper):
    import random
    final = [ random.randint(lower, upper) for _ in range(10) ]
    return final

Function to show how to use f string

def f_string(msg: "user message"):
    print(f'This is an f string with user paramter {msg}')

Function to show reading values from list is expensive in camparison to tuple

def compare_list_tuple():
    from timeit import timeit
    import random
    l = [ random.randint(1,100) for _ in range(100) ]
    tu = tuple(l)
    list_time = timeit(stmt = 'max(l)', globals = locals(), number = 1)
    tup_time = timeit(stmt = 'max(tu)', globals = locals(), number = 1)
    if list_time > tup_time:
        print('Hence proved')
    else:
        raise ValueError('You did something Wrong')

generate random number using the concept of iterators

class RandomInt:
    """
    This is the space to do documentation related to class.
    """
    def __init__(self):
       self.n = 10

    def __next__(self):
        if self.n > 0:
           print(random.randint(0,10))
           self.n -= 1
        else:
           raise StopIteration

    def __iter__(self):
        return self

distinguish iter , iterables and iterator using example to print 10 random integers number

class RandomInt:
    """
    This is the space to do documentation related to class.
    """
    def __init__(self):
       pass

    def __iter__(self):
        return self.RandomIntIterator(self)

    class RandomIntIterator:
        def __init__(self):
            self.count = 10

        def __iter__(self):
            return self

        def __next__(self):
            if self.count > 0:
                print(random.randint(0,10))
                self.count -= 1
            else:
                raise StopIteration