Added py-calculator

Problem Statement 3/Py-Calculator/README.md

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+##Python - Calculator
+##GUI Calculator made in python using tkinter
+
+
+Py-Calculator is a GUI calculator application with all the basic functionalities of a calculator written completely in Python3 using the tkinter framework.
+
+It can run on any system running Python 3 or above and having tkinter library.
+
+- Light weight
+- No hidden attributes
+- Cross platform support
+- Easy to understand source code
+
+## Requirements
+For the program to run, it needs the following **dependencies** to be installed in python:
+- math
+- tkinter
+- tkinter.constants
+- Typing 
+
+*If not present, then install the libraries using pip or any other way of your choice.
+
+## How to run
+As mentioned above, python version 3 is required to run this program.
+- First navigate to the 'Py-Calculator' folder.
+- Then run he following command:
+- python3 calculator.py
+

Problem Statement 3/Py-Calculator/calculator.py

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+import math
+import tkinter as tk
+from tkinter.constants import COMMAND, CURRENT, END, INSERT
+from typing import Text
+
+
+class Button(tk.Button):
+    def __init__(self, master, **kw):
+        tk.Button.__init__(self,master=master,**kw)
+        self.defaultBackground = self["background"]
+        self.bind("<Enter>", self.on_enter)
+        self.bind("<Leave>", self.on_leave)
+
+    def on_enter(self, e):
+        self['background'] = self['activebackground']
+
+    def on_leave(self, e):
+        self['background'] = self.defaultBackground
+
+
+ui = tk.Tk()
+ui.title("Calculator")
+
+ui.geometry("287x350")
+ui.attributes('-topmost', True)
+
+photo = tk.PhotoImage(file = "Images/icon.png")
+ui.iconphoto(False, photo)
+
+def lab(val):
+    tk.Label(ui, text=str(val), width=5, borderwidth=3).grid(row=0, column=4, pady=8, columnspan=2)
+
+lab(": )")
+
+e = tk.Entry(ui, font=("default, 11"), insertontime=0, bd=5, width=21, borderwidth=10, foreground="#ff0000", highlightthickness=5, highlightcolor="#00CFFF", highlightbackground="#00CFFF")
+e.grid(row=0, rowspan=2, column=0, columnspan=4, padx=5, pady=5)
+e.bind("<Key>", lambda e: "break")
+
+def view(val):
+    tk.Label(ui, borderwidth=3, relief="sunken", text=str(val), width=34, bg="#4EFF61", fg="#000000").grid(row=2, column=0, columnspan=5, pady=5)
+
+view("Calculations here")
+
+global flag
+flag = 0
+
+def insrt(number):
+    global flag
+    if flag == 1:
+        e.delete(0, END)
+        view("Calculations here")
+        lab(": )")
+        flag = 0
+    current=e.get()
+    e.delete(0, END)
+    e.insert(0, str(current)+str(number))
+
+def addition(s):
+    lab(s)
+    global stat
+    stat = str(s)
+    global num
+    num = e.get()
+    e.delete(0, END)
+
+def substraction(s):
+    lab(s)
+    global stat
+    stat = str(s)
+    global num
+    num = e.get()
+    e.delete(0, END)
+
+def multiplication(s):
+    lab(s)
+    global stat
+    stat = str(s)
+    global num
+    num = e.get()
+    e.delete(0, END)
+
+def division(s):
+    lab(s)
+    global stat
+    stat = str(s)
+    global num
+    num = e.get()
+    e.delete(0, END)
+
+def root(s):
+    lab(s)
+    global num
+    num = e.get()
+    e.delete(0, END)
+    e.insert(0, str("Root of: "))
+    global flag
+    flag = 0
+    global stat
+    stat = str(s)
+    res(s)
+
+def power(s):
+    lab(s)
+    global num
+    num = e.get()
+    e.delete(0, END)
+    e.insert(0, str("Power of: "))
+    global flag
+    flag = 0
+    global stat
+    stat = str(s)
+    res(s)
+
+def res(s):
+    lab(s)
+    global stat
+    num2 = e.get()
+    if stat == "+":
+        ans1 = float(num) + float(num2)
+        ans = ans1
+    elif stat == "-":
+        ans1 = float(num) - float(num2)
+        ans = ans1
+    elif stat == "x":
+        ans1 = float(num) * float(num2)
+        ans = ans1
+    elif stat == "/":
+        ans1 = float(num) / float(num2)
+        ans = "{:.3f}".format(ans1)
+    elif stat == "root":
+        num2 = str(num2[9:])
+        ans1 = float(math.pow(float(num), float(1/int(num2))))
+        ans = "{:.2f}".format(ans1)
+    elif stat == "pow":
+        num2 = str(num2[10:])
+        ans1 = float(math.pow(float(num), int(num2)))
+        ans = "{:.2f}".format(ans1)
+    e.delete(0, END)
+    e.insert(0, ans)
+    global flag
+    flag = 1
+    if stat == "root":
+        view(str(num2) + " root of " + str(num) + " = " + str(ans1))
+    elif stat == "pow":
+        view(str(num) + " power " + str(num2) + " = " + str(ans1))
+    else:
+        view(str(num) + " " + str(stat) + " " + str(num2) + " = " + str(ans1))
+
+
+def clear():
+    lab(": |")
+    view("Calculations here")
+    global flag
+    flag = 1
+    e.delete(0, END)
+
+
+sub = Button(ui,activebackground='#F2FF02', bg="#FF0006", text="-", padx=18, pady=15, command=lambda: substraction("-")).grid(row=5, column=3)
+mul = Button(ui,activebackground='#F2FF02', bg="#FF0006", text="x", padx=17, pady=15, command=lambda: multiplication("x")).grid(row=4, column=3)
+div = Button(ui,activebackground='#F2FF02', bg="#FF0006", text="/", padx=19, pady=8, command=lambda: division("/")).grid(row=3, column=3)
+cls = Button(ui,activebackground='#EE0D11',bg="#14FF02", text="cls", padx=15, pady=8, command= clear).grid(row=3, column=0)
+
+b7 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="7", padx=20, pady=15, command=lambda: insrt("7")).grid(row=4, column=0)
+b8 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="8", padx=20, pady=15, command=lambda: insrt("8")).grid(row=4, column=1)
+b9 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="9", padx=20, pady=15, command=lambda: insrt("9")).grid(row=4, column=2)
+add = Button(ui,activebackground='#F2FF02', bg="#FF0006", text="+", padx=15, pady=42, command=lambda: addition("+")).grid(row=6, column=3, rowspan=2)
+
+b4 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="4", padx=20, pady=15, command=lambda: insrt("4")).grid(row=5, column=0)
+b5 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="5", padx=20, pady=15, command=lambda: insrt("5")).grid(row=5, column=1)
+b6 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="6", padx=20, pady=15, command=lambda: insrt("6")).grid(row=5, column=2)
+
+b1 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="1", padx=20, pady=15, command=lambda: insrt("1")).grid(row=6, column=0)
+b2 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="2", padx=20, pady=15, command=lambda: insrt("2")).grid(row=6, column=1)
+b3 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="3", padx=20, pady=15, command=lambda: insrt("3")).grid(row=6, column=2)
+equall = Button(ui,activebackground='#89FFFD', bg="#FFF200", text="=", padx=18, pady=115, command=lambda: res("=")).grid(row=3, column=4, rowspan=5)
+
+bdot = Button(ui,activebackground='#14FF02', bg="#77FDFF", text=".", padx=22, pady=15, command=lambda: insrt(".")).grid(row=7, column=2)
+b0 = Button(ui,activebackground='#14FF02', bg="#77FDFF", text="0", padx=50, pady=15, command=lambda: insrt("0")).grid(row=7, column=0, columnspan=2)
+
+rt = Button(ui,activebackground='#F2FF02', bg="#FFCC76", text="\u221A", padx=19, pady=8, command=lambda: root("root")).grid(row=3, column=1)
+pow = Button(ui,activebackground='#F2FF02', bg="#FFCC76", text="pow", padx=10, pady=8, command=lambda: power("pow")).grid(row=3, column=2)
+
+
+ui.resizable(False, False)
+ui.mainloop()