| Sn.no. | Question |
|---|---|
| 1 | Interchange first and last elements in a list |
| 2 | Swap two elements in a list |
| 3 | Swap elements in a String list |
| 4 | Ways to find the length of a list |
| 5 | Maximum of two numbers in Python |
| 6 | Minimum of two numbers in Python |
| 7 | Reversing a List |
| 8 | Cloning or Copying a list |
| 9 | Count occurrences of an element in a list |
| 10 | Find sum and average of List in Python |
| 11 | Sum of number digits in List |
| 12 | Multiply all numbers in the list |
| 13 | Find the smallest number in a list |
| 14 | Find the largest number in a list |
| 15 | Find the second largest number in a list |
| 16 | Print even numbers in a list |
| 17 | Print odd numbers in a List |
| 18 | Print all even numbers in a range |
| 19 | Print all odd numbers in a range |
| 20 | Count Even and Odd numbers in a List |
| 21 | Print positive numbers in a list |
| 22 | Print negative numbers in a list |
| 23 | Print all positive numbers in a range |
| 24 | Print all negative numbers in a range |
| 25 | Count positive and negative numbers in a list |
| 26 | Remove multiple elements from a list in Python |
| 27 | Remove empty tuples from a list |
| 28 | Program to print duplicates from a list of integers |
| 29 | Remove empty List from List |
| 30 | Convert List to List of dictionaries |
| 31 | Convert Lists of List to Dictionary |
| 32 | Uncommon elements in Lists of List |
| 33 | Select Random value from list of lists |
| 34 | Reverse Row sort in Lists of List |
| 35 | Pair elements with Rear element in Matrix Row |
- Python program to interchange the first and last elements in a list:
def interchange_first_last(lst):
if len(lst) < 2:
return lst
lst[0], lst[-1] = lst[-1], lst[0]
return lst
# Example usage:
my_list = [1, 2, 3, 4, 5]
interchanged_list = interchange_first_last(my_list)
print(interchanged_list)- Python program to swap two elements in a list:
def swap_elements(lst, index1, index2):
if 0 <= index1 < len(lst) and 0 <= index2 < len(lst):
lst[index1], lst[index2] = lst[index2], lst[index1]
return lst
# Example usage:
my_list = [1, 2, 3, 4, 5]
swap_elements(my_list, 1, 3)
print(my_list)- Python program to swap elements in a String list:
def swap_elements_string_list(lst, index1, index2):
if 0 <= index1 < len(lst) and 0 <= index2 < len(lst):
lst[index1], lst[index2] = lst[index2], lst[index1]
return lst
# Example usage:
string_list = ["apple", "banana", "cherry", "date"]
swap_elements_string_list(string_list, 1, 3)
print(string_list)- Python program to find the length of a list:
def find_length_of_list(lst):
return len(lst)
# Example usage:
my_list = [1, 2, 3, 4, 5]
length = find_length_of_list(my_list)
print("Length of the list:", length)- Python program to find the maximum of two numbers:
def find_maximum(a, b):
return max(a, b)
# Example usage:
num1 = 10
num2 = 20
maximum = find_maximum(num1, num2)
print("Maximum:", maximum)- Python program to find the minimum of two numbers:
def find_minimum(a, b):
return min(a, b)
# Example usage:
num1 = 10
num2 = 20
minimum = find_minimum(num1, num2)
print("Minimum:", minimum)- Python program to reverse a list:
def reverse_list(lst):
return lst[::-1]
# Example usage:
my_list = [1, 2, 3, 4, 5]
reversed_list = reverse_list(my_list)
print(reversed_list)- Python program to clone or copy a list:
def clone_list(lst):
return lst.copy()
# Example usage:
original_list = [1, 2, 3, 4, 5]
copied_list = clone_list(original_list)
print(copied_list)- Python program to count occurrences of an element in a list:
def count_occurrences(lst, element):
return lst.count(element)
# Example usage:
my_list = [1, 2, 2, 3, 4, 2, 5]
element_to_count = 2
occurrences = count_occurrences(my_list, element_to_count)
print(f"{element_to_count} occurs {occurrences} times in the list.")- Python program to find the sum and average of a list:
def sum_and_average(lst):
if len(lst) == 0:
return 0, 0 # Handle empty list
list_sum = sum(lst)
list_average = list_sum / len(lst)
return list_sum, list_average
# Example usage:
my_list = [1, 2, 3, 4, 5]
total_sum, average = sum_and_average(my_list)
print(f"Sum: {total_sum}, Average: {average}")- Python program to find the sum of the digits in a list of numbers:
def sum_of_digits_in_list(lst):
return sum(int(digit) for num in lst for digit in str(num))
# Example usage:
my_list = [123, 45, 678]
digit_sum = sum_of_digits_in_list(my_list)
print("Sum of digits:", digit_sum)- Python program to multiply all numbers in a list:
def multiply_all_numbers(lst):
result = 1
for num in lst:
result *= num
return result
# Example usage:
my_list = [1, 2, 3, 4, 5]
product = multiply_all_numbers(my_list)
print("Product of all numbers:", product)- Python program to find the smallest number in a list:
def find_smallest_number(lst):
if len(lst) == 0:
return None # Handle empty list
return min(lst)
# Example usage:
my_list = [10, 2, 45, 7, 1]
smallest = find_smallest_number(my_list)
print("Smallest number:", smallest)- Python program to find the largest number in a list:
def find_largest_number(lst):
if len(lst) == 0:
return None # Handle empty list
return max(lst)
# Example usage:
my_list = [10, 2, 45, 7, 1]
largest = find_largest_number(my_list)
print("Largest number:", largest)- Python program to find the second largest number in a list:
def find_second_largest_number(lst):
if len(lst) < 2:
return None # Handle insufficient elements
sorted_list = sorted(lst, reverse=True)
return sorted_list[1]
# Example usage:
my_list = [10, 2, 45, 7, 1]
second_largest = find_second_largest_number(my_list)
print("Second largest number:", second_largest)- Python program to print even numbers in a list:
def print_even_numbers(lst):
for num in lst:
if num % 2 == 0:
print(num)
# Example usage:
my_list = [1, 2, 3, 4, 5, 6]
print("Even numbers:")
print_even_numbers(my_list)- Python program to print odd numbers in a list:
def print_odd_numbers(lst):
for num in lst:
if num % 2 != 0:
print(num)
# Example usage:
my_list = [1, 2, 3, 4, 5, 6]
print("Odd numbers:")
print_odd_numbers(my_list)- Python program to print all even numbers in a range:
def print_even_numbers_in_range(start, end):
for num in range(start, end + 1):
if num % 2 == 0:
print(num)
# Example usage:
start = 1
end = 10
print("Even numbers in the range:")
print_even_numbers_in_range(start, end)- Python program to print all odd numbers in a range:
def print_odd_numbers_in_range(start, end):
for num in range(start, end + 1):
if num % 2 != 0:
print(num)
# Example usage:
start = 1
end = 10
print("Odd numbers in the range:")
print_odd_numbers_in_range(start, end)- Python program to count even and odd numbers in a list:
def count_even_and_odd_numbers(lst):
even_count = 0
odd_count = 0
for num in lst:
if num % 2 == 0:
even_count += 1
else:
odd_count += 1
return even_count, odd_count
# Example usage:
my_list = [1, 2, 3, 4, 5, 6]
even, odd = count_even_and_odd_numbers(my_list)
print(f"Even numbers: {even}, Odd numbers: {odd}")- Python program to print positive numbers in a list:
def print_positive_numbers(lst):
for num in lst:
if num > 0:
print(num)
# Example usage:
my_list = [-1, 2, -3, 4, 5, -6]
print("Positive numbers:")
print_positive_numbers(my_list)- Python program to print negative numbers in a list:
def print_negative_numbers(lst):
for num in lst:
if num < 0:
print(num)
# Example usage:
my_list = [-1, 2, -3, 4, 5, -6]
print("Negative numbers:")
print_negative_numbers(my_list)- Python program to print all positive numbers in a range:
def print_positive_numbers_in_range(start, end):
for num in range(start, end + 1):
if num > 0:
print(num)
# Example usage:
start = -5
end = 5
print("Positive numbers in the range:")
print_positive_numbers_in_range(start, end)- Python program to print all negative numbers in a range:
def print_negative_numbers_in_range(start, end):
for num in range(start, end + 1):
if num < 0:
print(num)
# Example usage:
start = -5
end = 5
print("Negative numbers in the range:")
print_negative_numbers_in_range(start, end)- Python program to count positive and negative numbers in a list:
def count_positive_and_negative_numbers(lst):
positive_count = sum(1 for num in lst if num > 0)
negative_count = sum(1 for num in lst if num < 0)
return positive_count, negative_count
# Example usage:
my_list = [-1, 2, -3, 4, 5, -6]
positive, negative = count_positive_and_negative_numbers(my_list)
print(f"Positive numbers: {positive}, Negative numbers: {negative}")- Remove multiple elements from a list in Python:
To remove multiple elements from a list, you can use list comprehension. Here's an example that removes elements based on a condition:
my_list = [1, 2, 3, 4, 5, 6]
elements_to_remove = [2, 4, 6]
my_list = [x for x in my_list if x not in elements_to_remove]
print(my_list)- Python program to remove empty tuples from a list:
def remove_empty_tuples(lst):
return [tup for tup in lst if tup]
# Example usage:
my_list = [(1, 2), (), (3, 4), (), (5, 6)]
filtered_list = remove_empty_tuples(my_list)
print(filtered_list)- Python program to print duplicates from a list of integers:
def find_duplicates(lst):
seen = set()
duplicates = set()
for num in lst:
if num in seen:
duplicates.add(num)
else:
seen.add(num)
return list(duplicates)
# Example usage:
my_list = [1, 2, 2, 3, 4, 4, 5, 6]
duplicates = find_duplicates(my_list)
print("Duplicate elements:", duplicates)