def add(x, y):
    return x + y

def subtract(x, y):
    return x - y

def multiply(x, y):
    return x * y

def divide(x, y):
    return x / y

print("Select operation.")
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")

while True:
    choice = input("Enter choice(1/2/3/4): ")
    if choice in ('1', '2', '3', '4'):
        num1 = float(input("Enter first number: "))
        num2 = float(input("Enter second number: "))

        if choice == '1':
            print(num1, "+", num2, "=", add(num1, num2))

        elif choice == '2':
            print(num1, "-", num2, "=", subtract(num1, num2))

        elif choice == '3':
            print(num1, "*", num2, "=", multiply(num1, num2))

        elif choice == '4':
            print(num1, "/", num2, "=", divide(num1, num2))
        break
    else:
        print("Invalid Input")

import random
a = random.randint(1, 6)
print(f"Dice rolls {a}")

story = "story.txt"
with open(story, "r") as f:
    lines = f.readlines()
    for line in lines:
        print(line)

oldfile = open('content.txt')
lines = oldfile.readlines()
newopen = open('newfile.txt', 'w')
#print(lines)

for line in lines:
    if 'a' in line:
        #print(line)
        line = line.replace(line, '')
    else:
        newopen.write(line)
newopen.close()
oldfile.close()
print("Contents copied over to newfile.txt")

with open('story.txt', 'r') as f:
    for line in f:
        for word in line.split():
            print(word, end="#")
    print('\n')

vowels = ['a','e','i','o','u']
vowels_count = 0
consonat_count = 0
upper_count = 0
lower_count = 0


file = open('story.txt', 'r')
data = file.read()
print(data)
for ch in data:
    if str.isupper(ch):
        upper_count += 1
    elif str.islower(ch):
        lower_count += 1
    ch2 = str.lower(ch)
    if ch2 in vowels:
        vowels_count+=1
    elif ch2 not in vowels:
        consonat_count+=1

print(f"No. of vowels are {vowels_count}")
print(f"No. of vowels are {consonat_count}")
print(f"No. of vowels are {upper_count}")
print(f"No. of vowels are {lower_count}")
file.close()

import pickle
import sys
import pprint as pp
dict= {}

def write_in_file():
    file = open("Student.pickle", "ab")
    dict["Roll"] = int(input("Enter the Roll NO: "))
    dict["Name"] = input("Enter a name: ")
    pickle.dump(dict, file)
    file.close()

def display():
    file = open("Student.pickle", 'rb')
    try:
        while True:
            Student = pickle.load(file)
            pp.pprint(Student)
    except EOFError:
        pass
    file.close()


def search():
    file = open("Student.pickle", 'rb')
    reader = int(input("Enter the Roll No. to search: "))
    found = False
    try:
        while True:
            data = pickle.load(file)
            if data["Roll"] == reader:
                print("Record Found")
                print(data)
                found = True
                break
    except EOFError:
        pass
    if found==False:
        print("Record not found \n \n")
    file.close()


#main program
while True:
    print("Menu \n 1-Write in a file \n 2-display \n 3-Search \n 4-exit \n")
    ch = int(input("Enter a Choice: "))
    if ch==1:
        write_in_file()
    if ch==2:
        display()
    if ch==3:
        search()
    if ch==4:
        sys.exit()

import pickle
import pprint as pp
import sys

def Display(data):
    data = {}
    file = open("Student.pickle", 'rb')
    try:
        while True:
            Student = pickle.load(file)
            pp.pprint(Student)
    except EOFError:
        file.close()

def Search(data):
    data = {}
    file = open("Student.pickle", 'rb+')
    reader = int(input("Enter the Roll No. to search: "))
    found = False
    try:
        while True:
            data = pickle.load(file)
            if data["Roll"] == reader:
                print("Record Found")
                print(data)
                found = True
                break
    except EOFError:
        if found == False:
            print("Record not found \n \n")
        file.close()

def write_in_file(data):
    data = {}
    studs = int(input("Enter no. of students: "))
    file = open("Student.pickle", "rb+")
    for i in range(1,studs+1):
        data["Roll"] = int(input("Enter the Roll NO: "))
        data["Name"] = input("Enter a name: ")
        data["Marks"] = float(input("Enter the marks: "))
        pickle.dump(data, file)
        print(f"{i} Record(s) Entered Sucessfully")
        data={}
        
    file.close()

def Update_marks(data):
    data = {}
    found = False
    reader = int(input("Enter the Roll No. to update: "))
    file = open("Student.pickle", 'rb+')

    try:
        while True:
            pos = file.tell()
            data = pickle.load(file)
            if data["Roll"] == reader:
                print("Record Found")
                print(data)
                data["Marks"] = float(input("Enter the marks: "))
                file.seek(pos)
                found = True
                pickle.dump(data, file)
                break
    except EOFError:
        if found == False:
            print("Record not found \n \n")
        else:
            print("Marks updated Sucessfully")
        file.close()

    
Sdata = {}

#main program
while True:
    print("Menu \n 1-Write in a file \n 2-display \n 3-Search \n 4-Update Marks \n 5-exit")
    ch = int(input("Enter a Choice: "))
    if ch == 1:
        write_in_file(Sdata)
    if ch == 2:
        Display(Sdata)
    if ch == 3:
        Search(Sdata)
    if ch == 4:
        Update_marks(Sdata)
    if ch == 5:
        sys.exit()

import sys

LIST = []

def add(index,obj):
    LIST.insert(index,obj)


def delete(elememt):
    LIST.remove(elememt)


def search(obj):
    for i in range(len(LIST)):
        if LIST[i] == obj:
            print(f"Object found at {i} index")


while True:
    print('''\n1. Insert a value into the LIST
2. Append a value to the list
3. Delete a value from the LIST
4. Display the LIST
5. Search the LIST for an element 
6. Exit
    ''')
    choice = int(input("Enter a choice: "))


    if choice == 1:
        OBJECT = input("Element: ")
        INDEX = int(input("Index: "))
        add(INDEX,OBJECT)


    elif choice == 2:
        VAR = input("Element to append: ")
        LIST.append(VAR)


    elif choice == 3:
        ELEMENT = input("Enter the element to remove: ")
        try:
            delete(ELEMENT)
        except ValueError:
            print("ELement not present in the list")


    elif choice == 4:
        print(LIST)


    elif choice == 5:
        OBJ = input("Enter the element to search: ")
        search(OBJ)


    elif choice == 6:
        sys.exit()

import sys

STACK = []

def push(element):
    STACK.append(element)

def pop():
    if len(STACK) == 0:
        print("List is empty")
    else:
        c = STACK.pop()
        print(c)


def display_stack():
    for i in range(len(STACK)-1, -1, -1):
        print(STACK[i])

while True:
    print('''\n1. Push into the STACK
2. Pop value from the STACK
3. Display the STACK
4. Exit
    ''')
    choice = int(input("Enter a choice: "))
    if choice==1:
        val = input("Enter a value: ")
        push(val)
    elif choice==2:
        pop()
    elif choice==3:
        display_stack()
    elif choice == 4:
        sys.exit()

with open("email.txt", "r") as f:
    content = f.read()
    max = 0
    max_occuring_word = ""
    occurances_dict = {}
    words = content.split()
    for word in words:
        count = content.count(word)
        occurances_dict.update({word:count})
        if count>max:
            max=count
            max_occuring_word = word
    print(f"Most occuring word: {max_occuring_word}")
    print(f"Frequency of other words {occurances_dict}")

import mysql.connector as sqltor
from mysql.connector import Error

connection = sqltor.connect(
    host='localhost', database='Haziq', user='root', password='<pass>')
try:
    if connection.is_connected():
        db_Info = connection.get_server_info()
        print("Connected to MySQL Server version ", db_Info)
        cursor = connection.cursor()
        cursor.execute("select database();")
        record = cursor.fetchone()
        print("You're connected to database: ", record)

except Error as e:
    print("Error while connecting to MySQL", e)
finally:
    if (connection.is_connected()):
        cursor.close()
        connection.close()
        print("MySQL connection is closed")

import mysql.connector
connection=mysql.connector.connect(host="localhost",user="root",password="c9070baa",database="sales")
cursor = connection.cursor()
cursor.execute("create table ORDERS(ord_no int(5) primary key,purch_amt decimal(8,2),ord_date date, customer_id int(4), salesman_id int (4))")
cursor.close()
connection.close()

import mysql.connector
connection=mysql.connector.connect(host="localhost",user="root",password="c9070baa",database='sales')
cursor=connection.cursor()
cursor.execute('''
                INSERT INTO ORDERS (ord_no, purch_amt, ord_date,customer_id,salesman_id)
                VALUES
                (70001,150.5,20121005,3005,5002),
                (70009,270.65,20120910,3001,5005),
                (70002,65.26,20121005,3002,5001),
                (70004,110.5,20120817,3009,5003),
                (70007,948.5,20120910,3005,5002),
                (70005,2400.6,20120727,3007,5001),
                (70008,5760,20120910,3002,5001)
                ''')
connection.commit()
cursor.close()
connection.close()

import mysql.connector
connection=mysql.connector.connect(host="localhost",user="root",password="c9070baa",database='sales')
cursor=connection.cursor()
cursor.execute('Select * from orders')
for x in cursor:
    print (x)
cursor.close()
connection.close()

import mysql.connector
connection=mysql.connector.connect(host="localhost",user="root",password="****!",database='sales')
cursor=connection.cursor()
cursor.execute('Select * from orders where salesman_id=5001')
for x in cursor:
    print (x)
cursor.close()
connection.close()

import mysql.connector
connection=mysql.connector.connect(host="localhost",user="root",password="c9070baa",database='school')
cursor=connection.cursor()
x=int(input('''
Enter '1' to search in table GAMES
Enter '2' to search in table PLAYERS
'''))
if x==1:
    col=input("Enter column: ")
    whereclause=input('Enter where clause: ')
    cursor.execute('Select {} from games where {}'. format (col,whereclause))
    record=cursor.fetchall()
    for i in record:
        print (i)
elif x==2:
    col=input("Enter column: ")
    whereclause=input('Enter where clause: ')
    cursor.execute('Select {} from player where {}'. format (col,whereclause))
    record=cursor.fetchall()
    for i in record:
        print (i)   
cursor.close()
connection.close()