Simple calculator using python and tkinter

 from re import sub

from tkinter import *

#creating a window

root =  Tk()

#decale the default variable

calc = ""

#definig the function

def addi():

    global calc

    calc += "+"

    pop['text'] = calc

def subi():

    global calc

    calc += "-"

    pop['text'] = calc

def divi():

    global calc

    calc += "/"

    pop['text'] = calc

def multipl():

    global calc

    calc += "*"

    pop['text'] = calc

def ze():

    global calc

    calc += "0"

    pop['text'] = calc

def on():

    global calc

    calc += "1"

    pop['text'] = calc

def tw():

    global calc

    calc += "2"

    pop['text'] = calc

def th():

    global calc

    calc += "3"

    pop['text'] = calc

def fo():

    global calc

    calc += "4"

    pop['text'] = calc

def fi():

    global calc

    calc += "5"

    pop['text'] = calc

def si():

    global calc

    calc += "6"

    pop['text'] = calc

def se():

    global calc

    calc += "7"

    pop['text'] = calc

def ei():

    global calc

    calc += "8"

    pop['text'] = calc

def ni():

    global calc

    calc += "9"

    pop['text'] = calc

def decii():

    global calc

    calc += "."

    pop["text"] = calc

def evali():

    global calc

    try:

        calc = eval(calc)

        pop["text"] = calc

        calc = ""

    except:

        pop['text'] = "AN ERROR OCCURRED"

        calc = ""

def cleari():

    global calc

    calc = ""

    pop["text"] = calc

#naming the window

root.title("A SIMPLE CALCULATOR")

#label and entry field

m = Label(root, text="CALCULATOR", font=(25))

pop = Label(root, text='', font=(50))

#operators box

adding = Button(root, text="+",height=2, width=5, command=addi)

subtracting = Button(root, text="-",height=2, width=5, command=subi)

dividing = Button(root, text="/",height=2, width=5, command=divi)

multiplying = Button(root, text="*",height=2, width=5, command=multipl)

equating = Button(root, text="=", height=10, width=13, command=evali)

#numbers

nine = Button(root, text="9", height=2, width=5, command=ni)

eight = Button(root, text="8", height=2, width=5, command=ei)

seven = Button(root, text="7", height=2, width=5, command=se)

six = Button(root, text="6", height=2, width=5, command=si)

five = Button(root, text="5", height=2, width=5, command=fi)

four = Button(root, text="4", height=2, width=5, command=fo)

three = Button(root, text="3", height=2, width=5, command=th)

two = Button(root, text="2", height=2, width=5, command=tw)

one = Button(root, text="1", height=2, width=5, command=on)

zero = Button(root, text="0", height=2, width=5, command=ze)

ccc = Button(root, text="C", height=2, width=5, command=cleari)

deci = Button(root, text=".", height=2, width=5, command=decii)

#placing on screen

m.place(x=190, y=0)

pop.place(x=100, y=30)

#placiing operators

adding.place(x=100, y=60)

subtracting.place(x=150, y=60)

dividing.place(x=200, y=60)

multiplying.place(x=250, y=60)

equating.place(x=300, y=60)

#placing digits

nine.place(x=100, y=100)

eight.place(x=150, y=100)

seven.place(x=200, y=100)

six.place(x=250, y=100)

five.place(x=100, y=140)

four.place(x=150, y=140)

three.place(x=200, y=140)

two.place(x=250, y=140)

ccc.place(x=100, y=180)

one.place(x=150, y=180)

zero.place(x=200, y=180)

deci.place(x=250, y=180)

root.resizable(False, False)

root.geometry("500x500")

root.mainloop()

Letter Counter

 Given a string as input, you need to output how many times each letter appears in the string.

You decide to store the data in a dictionary, with the letters as the keys, and the corresponding counts as the values.

Create a program to take a string as input and output a dictionary, which represents the letter count.

Sample Input

hello

Sample Output

{'h': 1, 'e': 1, 'l': 2, 'o': 1}

Fruit Bowl

 You have a bowl on your counter with an even number of pieces of fruit in it. Half of them are bananas, and the other half are apples. You need 3 apples to make a pie.

Task

Your task is to evaluate the total number of pies that you can make with the apples that are in your bowl given to total amount of fruit in the bowl.

Input Format

An integer that represents the total amount of fruit in the bowl.

Output Format

An integer representing the total number of whole apple pies that you can make.

Sample Input

26

Sample Output

4

From feet to inches

 You need to make a function that converts a foot value to inches.

1 foot has 12 inches.

Define a convert() function, that takes the foot value as argument and outputs the inches value.

Shouting text

 Your friend is sending you a text message, however his caps lock is broken and the whole message is in uppercase.

Noone likes being shouted at, plus uppercase text is hard to read, so you decide to write a program to convert the text to lowercase and output it.

Take a string as input and output it in lowercase.

Analyze to realize

 You’re analyzing a data set and need to remove the outliers (the smallest and largest values.

The data is stored in a list).

Complete the code to remove the smallest and largest elements from the list and output the sum of the remaining numbers.

Name please

 You need to take the first and last name of a person as input and output the initials (first letters of the first and last name).

Sample Input

James

Smith

Sample Output

J.S.

Python PIP

 PIP is a package management system that is used to install and manage Python-based software packages.