Machine test.txt

#1.	A website requires the users to input username and password to register. 
#Write a program to check the validity of password input by users.

'''def password():
 while True:
  for i in c:
   if 6<=len(i)<=12 and re.search("[A-Za-z0-9!@#$%^&*]",i) :
    print(i)
    return
  
import re
p=input("enter the passwords")
c=p.split(",")
print(c)
password()'''


#2.Given an positive integer n, if you apply the following rules iteratively, you will eventually get a 1.

'''n=(int(input("Enter the number")))
print("you have entered:",n)
l=[]
l.append(n)
while n > 1:
    if n %2==0:
        n=n/2
    else:
        n=(3*n)+1
    l.append(n)
print(l)'''


#3.Create a simple calculator GUI app using TKinter framework.

'''import tkinter as tk

class Calculator:
    def __init__(self, m):
        self.m = m
        m.title("Calculator")

        
        self.display = tk.Entry(m, width=30, justify='right')
        self.display.grid(row=0, column=0, columnspan=4, padx=5, pady=5)

        
        buttons = [
            '7', '8', '9', '/',
            '4', '5', '6', '*',
            '1', '2', '3', '-',
            '0', '.', '=', '+'
        ]

        
        for row in range(1, 5):
            for col in range(4):
                index = (row - 1) * 4 + col
                if buttons[index] == '=':
                    button = tk.Button(m, text='=', width=10, height=3, command=lambda: self.calculate())
                else:
                    button = tk.Button(m, text=buttons[index], width=10, height=3, command=lambda value=buttons[index]: self.add_to_display(value))
                button.grid(row=row, column=col, padx=5, pady=5)

        
        clearbutn = tk.Button(m, text='C', width=10, height=3, command=lambda: self.clear_display())
        clearbutn.grid(row=5, column=0, columnspan=3, padx=5, pady=5)

    def add_to_display(self, value):
        self.display.insert(tk.END, value)

    def clear_display(self):
        self.display.delete(0, tk.END)

    def calculate(self):
        try:
            result = eval(self.display.get())
            self.display.delete(0, tk.END)
            self.display.insert(tk.END, result)
        except:
            self.display.delete(0, tk.END)
            self.display.insert(tk.END, "Error")


root = tk.Tk()
calculator = Calculator(root)
root.mainloop()'''


#4.The denominations in Indian currency are: |1, |2, |5, |10, |,20, |50, |100, |200, |500, |2000. 
# Given an amount N, print how many coins/notes make up N Sample input

'''d= [2000, 500, 200, 100, 50, 10, 5, 2, 1] 
n = int(input("Enter the amount: "))   
c = [0] * len(d)   
for i in range(len(d)):
    c[i] = n // d[i]   
    n = n % d[i]   

print("Denominations and number of coins/notes:")
for i in range(len(d)):
    if c[i] != 0:
        print("|" + str(d[i]) + ":", c[i])'''