rough.py

'''
a = "Hello"
b = "world"

print(a+b)
print(a,b)
print(a + " " + b)

age = 36
txt = f"my name is john + {age}"
print(txt)

a = "Hello, world"
print(a[0:4])

print(10<9)

a = 10
b = 20

if a > b:
    print(a)
else:
    print(b)

x = 20
print(isinstance(x, int))


thislist = ["apple", "banana", "cherry"]
thislist[1:2] = ["blackcurrant", "watermelon"]
print(thislist) 

myfamily = {
  "child1" : {
    "name" : "Emil",
    "year" : 2004
  },
  "child2" : {
    "name" : "Tobias",
    "year" : 2007
  },
  "child3" : {
    "name" : "Linus",
    "year" : 2011
  }
} 

print(myfamily)

for x, obj in myfamily.items():
  print(x)

  for y in obj:
    print(y + ':', obj[y])


def is_even(number):
    # number = int(input())
    if number % 2 == 0:
        return True
    else:
         return False

print(is_even(22))

# Write a Python program to print all the numbers from 1 to 20 that are divisible by 3. Use a for loop and an if condition inside it.

def div_three():
    for number in range(1,21):
        if number % 3 == 0:
            print(number)

div_three()
        
# Write a Python function named count_vowels that takes a string and returns the number of vowels (a, e, i, o, u) in that string.

def count_vowels(text):
    vowels = ["a", "e", "i", "o", "u"]
    count = 0
    for vow in text:
        if  vow in vowels:
            count += 1
    return(count)
   
print(count_vowels("Hello!, world"))  

# Write a Python program that takes a list of numbers and returns a new list containing only the unique numbers (no duplicates) in the original order.

def list_of_numbers(nums):
    unique_list = []
    for unique in nums:
        if unique not in unique_list:
            unique_list .append(unique)
    return unique_list

print(list_of_numbers([1,2,3,4,4,5,6,6,6,7]))

# Write a Python program that manages a simple dictionary of student names and their marks. Implement the following operations as functions:
# Add a student with marks, Update marks of an existing student, Delete a student by name, Display all students and their marks
# You can start with an empty dictionary and call your functions to test.

students = {}

def add_new_student():
    name = input("Enter the name : ")
    mark = int(input("Enter the mark : "))
    students[name] = mark
    print(students)

add_new_student()
add_new_student()

def update_marks():
    name = input("Enter the name of student to update : ")
    new_mark = int(input("Enter the new mark to update : "))
    students[name] = new_mark
    print(students)

update_marks()

def delete_student():
    name = input("enter the student name to delete : ")
    students.pop(name)
    print(students)

delete_student()

def display_students():
    print(students)

display_students()

'''

# Question 1: Write a Python function that takes a list of numbers and returns the sum of all even numbers in the list.

def even_number(nums):
    total = 0
    for number in nums:
        if number % 2 == 0:
            total = number + total

    return total     
                        
            
print(even_number([1,2,3,4,5,6,7,8,9]))
    

# Question 2: Write a Python function that takes a string and returns a new string with all vowels removed.

def remove_vowels(name):
    name_removed = []
    vowels = ["a","e","i","o","u"]
    for alpha in name:
        if alpha not in vowels:
          name_removed.append(alpha)
    return "".join(name_removed)


print(remove_vowels("siddarth"))

# Question 3: Write a Python program that takes a list of integers and returns a new list with each number squared (number multiplied by itself).