import tkinter as tk

import math

# Main window

root = tk.Tk()

root.title("Scientific Calculator")

root.geometry("430x550")

root.resizable(False, False)

# Display screen

equation = ""

input_text = tk.StringVar()

display = tk.Entry(root, font=("Arial", 20), textvariable=input_text, bd=10, justify="right")

display.grid(row=0, column=0, columnspan=5, padx=10, pady=20, ipadx=10, ipady=10)

# Button click function

def button_click(value):

  global equation

  equation += str(value)

  input_text.set(equation)

# Clear screen

def clear():

  global equation

  equation = ""

  input_text.set("")

# Evaluate the expression

def calculate():

  global equation

  try:

    result = str(eval(equation))

    input_text.set(result)

    equation = result

  except:

    input_text.set("Error")

    equation = ""

# Scientific Functions

def scientific_function(func):

  global equation

  try:

    if func == "sqrt":

      equation = str(math.sqrt(float(equation)))

    elif func == "sin":

      equation = str(math.sin(math.radians(float(equation))))

    elif func == "cos":

      equation = str(math.cos(math.radians(float(equation))))

    elif func == "tan":

      equation = str(math.tan(math.radians(float(equation))))

    elif func == "log":

      equation = str(math.log10(float(equation)))

    elif func == "ln":

      equation = str(math.log(float(equation)))

    elif func == "fact":

      equation = str(math.factorial(int(equation)))

    input_text.set(equation)

  except:

    input_text.set("Error")

    equation = ""

# Buttons layout

buttons = [

  ("7", 1, 0), ("8", 1, 1), ("9", 1, 2), ("/", 1, 3), ("C", 1, 4),

  ("4", 2, 0), ("5", 2, 1), ("6", 2, 2), ("*", 2, 3), ("(", 2, 4),

  ("1", 3, 0), ("2", 3, 1), ("3", 3, 2), ("-", 3, 3), (")", 3, 4),

  ("0", 4, 0), (".", 4, 1), ("=", 4, 2), ("+", 4, 3), ("% ", 4, 4),

]

# Create normal buttons

for (text, row, col) in buttons:

  if text == "=":

    tk.Button(root, text=text, width=7, height=3, font=("Arial", 12),

         command=calculate).grid(row=row, column=col)

  elif text == "C":

    tk.Button(root, text=text, width=7, height=3, font=("Arial", 12),

         command=clear).grid(row=row, column=col)

  else:

    tk.Button(root, text=text, width=7, height=3, font=("Arial", 12),

         command=lambda t=text: button_click(t)).grid(row=row, column=col)

# Scientific Buttons

scientific_buttons = [

  ("sin", "sin"), ("cos", "cos"), ("tan", "tan"),

  ("log", "log"), ("ln", "ln"), ("√", "sqrt"),

  ("x²", "square"), ("xⁿ", "power"), ("!", "fact"),

]

# Display scientific buttons

row = 5

col = 0

for (text, func) in scientific_buttons:

  if func == "square":

    cmd = lambda: button_click("**2")

  elif func == "power":

    cmd = lambda: button_click("**")

  else:

    cmd = lambda f=func: scientific_function(f)

  tk.Button(root, text=text, width=7, height=3, font=("Arial", 12),

       command=cmd).grid(row=row, column=col)

  col += 1

  if col > 4:

    col = 0

    row += 1

root.mainloop()