List Operations in Python: Sum of List Items

🎯 Aim

To write a Python program that calculates the sum of all elements in a list.

🧠 Algorithm

1. Define a list of numbers.
2. Use Python’s built-in sum() function to calculate the total.
3. Print the result.

🧾 Program

items=[153,147,124,102]
print(sum(items))

Output

Result

Thus the program executed successfully.

Regex in Python: Filter Words Without the Letter 'e'

🎯 Aim

To write a Python program that filters out and returns all elements from a list that do not contain the letter 'e', using regular expressions (regex).

🧠 Algorithm

1. Import the re module.
2. Initialize an empty list l1 to store results.
3. Define a list of words:
   items = ['goal', 'new', 'user', 'sit', 'eat', 'dinner']
4. Iterate through each word in the list:
   • Use re.search(r"e", i) to check if the word contains 'e'.
   • If not, append the word to l1.
5. Print the final filtered list.

🧾 Program

import re
l1 = []
items = ['goal', 'new', 'user', 'sit', 'eat', 'dinner']
for i in items:
    if not re.search(r"e", i):
        l1.append(i)
print("Words without 'e':", l1)

Output

Result

Thus the program executed successfully.

Module-3

🧹 Strings-Remove Nth Index Character from a String

🎯 Aim

To write a Python program that accepts a string and removes the character at a specified index.

🧠 Algorithm

1. Define a function named remove that takes the input string as an argument.
2. Read the index n from the user input.
3. Initialize an empty string a to store the new string.
4. Iterate over each index of the string using a for loop.
5. Check if the current index i is not equal to n.
6. If i != n, append the character at index i to string a.
7. After the loop, return the modified string a.
8. Print the final result.

💻 Program

n=int(input())
def remove(a):
    for i in range(0,len(a)):
        if(i!=n):
            print(a[i],end='')

Output

Result

Thus the program executed successfully.

Strings-Palindrome Check in Python (Without Built-in Functions)

🎯 Aim

To write a Python program to check whether the string "google" is a palindrome or not, without using built-in palindrome checking functions.

🧠 Algorithm

1. Assign the string "google" to a variable.
2. Reverse the string manually using slicing ([::-1]).
3. Compare the original string with the reversed string.
   • If they are equal, print that the string is a palindrome.
   • Otherwise, print that it is not a palindrome.
4. Execute the program.

🧾 Program

a=input()
s=a[::-1]
if a==s:
    print("The entered string is palindrome")
else:
    print("The entered string is not palindrome")

Output

Result

Thus the program executed successfully.

Tuple in Python: Check Element Existence

🎯 Aim

To write a Python program that checks if the element 'n' and the element 8 exist within a given tuple.

🧠 Algorithm

1. Define a tuple x with some letters and numbers.
2. Use the in operator to check if the string 'n' exists within the tuple.
3. Use the in operator to check if the integer 8 exists within the tuple.
4. Print the results.

🧾 Program

tuplex = input()
print("n" in tuplex)
print("8" in tuplex)

Output

Result

Thus the program executed successfully