Calculadora em python usando tkinter
Ola e seja bem vindo ao hash tag online
Neste capitulo irei monstrar como fazer uma calculador avancada em python usando tkinter. Mas antes de aprofundar na parte pratica, quero dar alguns conceitos que ira ajudar - te a criar apps modernos e interactivos em python
Resultado final:
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Tkinter e uma bibloteca python que serve para o desevolvimento de apps com interface grafica, onde o user ira interagir com UGI(butoes, labels , ...) em vez de uma linha de commandos(CLI). Essa bibloteca e bastante poderosa e oferece varias ferramentas para o desevolvimento correcto dos seus sistemas.
Requisitos:
> Ter o python instalado no seu dispositivo
>Ter o VScode ou uma outra IDE instalada no seu dispositivo
Sendo o tkinter uma biblioteca built-in ou seja ja vem imbutida no proprio python.
Source Code:
from tkinter import *
from math import sqrt
def percent():
first_number = entry.get()
f_num.set(float(first_number))
delete_entry()
label_value.set(str(first_number) + " % of ")
singal.set(1)
def type_number(number):
first_number = entry.get()
if ("." in first_number) and (number == "."):
pass
else:
entry.delete(0, END)
current_number = str(first_number) + str(number)
entry.insert(END, current_number)
operation.set("DIG")
def calc_perc():
l_n = float(entry.get())
f_n = f_num.get()
result = (l_n * f_n) / 100
delete_entry()
entry.insert(0, result)
last_label_value = label_value.get()
label_value.set(last_label_value + str(l_n))
def iqual():
if singal.get() == 1:
calc_perc()
singal.set(0)
else:
brute_terms = entry.get()
try:
terms = brute_terms.replace("x", "*")
terms = brute_terms.replace("÷", "/")
except:
pass
try:
result = str(eval(terms))
entry.delete(0, END)
entry.insert(0, result)
label_value.set(brute_terms)
operation.set("IQU")
except:
label_value.set(brute_terms + " ERROR")
operation.set("ERR")
pass
def sqroot():
term = float(entry.get())
result = sqrt(term)
delete_entry()
entry.insert(0, result)
label_value.set("√ of "+str(term))
def delete_entry():
entry.delete(0, END)
operation.set("DEL")
def clean():
entry.delete(0, END)
label_value.set("")
operation.set("CLE")
root = Tk()
root.title("Calculadora")
root['bg'] = "cyan"
f_num = DoubleVar()
l_num = DoubleVar()
operation = StringVar()
label_value = StringVar()
singal = IntVar()
singal.set(0)
# declaring widgets
label = Label(root, textvariable = label_value, bg = "cyan", font = ("anonymous", 10))
entry = Entry(root, font = ('Arial', 16), bg = "cyan")
sqrbtn = Button(root, text= "√",relief = FLAT, bg = "lightgreen", command = sqroot)
blopenbtn = Button(root, text= "(",relief = FLAT, bg = "light coral", command = lambda: type_number("("))
blclosebtn = Button(root, text= ")",relief = FLAT, bg = "light coral", command = lambda: type_number(")"))
percetbtn = Button(root, text= "%",relief = FLAT, bg = "lightgray", command = percent)
delbtn = Button(root, text= "DEL", relief = FLAT, bg = "lightpink", command = delete_entry)
clrbtn = Button(root, text= "CLR", relief = FLAT, bg = "tomato", command = clean)
btn0 = Button(root, text= "0", relief = FLAT, bg = "lightblue", command = lambda: type_number(0))
btn1 = Button(root, text= "1", relief = FLAT, bg = "lightblue", command = lambda: type_number(1))
btn2 = Button(root, text= "2", relief = FLAT, bg = "lightblue", command = lambda: type_number(2))
btn3 = Button(root, text= "3", relief = FLAT, bg = "lightblue", command = lambda: type_number(3))
btn4 = Button(root, text= "4", relief = FLAT, bg = "lightblue", command = lambda: type_number(4))
btn5 = Button(root, text= "5", relief = FLAT, bg = "lightblue", command = lambda: type_number(5))
btn6 = Button(root, text= "6", relief = FLAT, bg = "lightblue", command = lambda: type_number(6))
btn7 = Button(root, text= "7", relief = FLAT, bg = "lightblue", command = lambda: type_number(7))
btn8 = Button(root, text= "8", relief = FLAT, bg = "lightblue", command = lambda: type_number(8))
btn9 = Button(root, text= "9", relief = FLAT, bg = "lightblue", command = lambda: type_number(9))
spotbtn = Button(root, text= ".", relief = FLAT, bg = "lightblue", command = lambda: type_number("."))
devbtn = Button(root, text= "÷", relief = FLAT, bg = "lightgray", command = lambda: type_number("÷"))
multbtn = Button(root, text= "x", relief = FLAT, bg = "lightgray", command = lambda: type_number("x"))
addbtn = Button(root, text= "+", relief = FLAT, bg = "lightgray", command = lambda: type_number("+"))
subbtn = Button(root, text= "-", relief = FLAT, bg = "lightgray", command = lambda: type_number("-"))
iqualbtn = Button(root, text= "=", relief = FLAT, bg = "lightgreen", command = iqual)
# give position for widgets
label.grid(row = 0, column = 0,columnspan = 4, sticky = W)
entry.grid(row = 1, column = 0, columnspan = 4, sticky = W+E, ipady = 30)
btn7.grid(row = 3, column = 0, sticky = W+E, ipadx = 20, ipady = 30)
btn8.grid(row = 3, column = 1, sticky = W+E, ipadx = 20, ipady = 30)
btn9.grid(row =3, column = 2, sticky = W+E, ipadx = 20, ipady = 30)
clrbtn.grid(row =3, column = 3, sticky = W+E+N, ipadx = 20, ipady = 8)
delbtn.grid(row =3, column = 3, sticky = W+E+S, ipadx = 20, ipady = 8)
devbtn.grid(row =4, column = 3, sticky = W+E+N, ipadx = 20, ipady = 8)
btn4.grid(row = 4, column = 0, sticky = W+E, ipadx = 20, ipady = 30)
btn5.grid(row = 4, column = 1, sticky = W+E, ipadx = 20, ipady = 30)
btn6.grid(row =4, column = 2, sticky = W+E, ipadx = 20, ipady = 30)
multbtn.grid(row =4, column = 3, sticky = W+E+S, ipadx = 20, ipady = 8)
subbtn.grid(row =5, column = 3, sticky = W+E+N, ipadx = 20, ipady = 8)
btn1.grid(row = 5, column = 0, sticky = W+E, ipadx = 20, ipady = 30)
btn2.grid(row = 5, column = 1, sticky = W+E, ipadx = 20, ipady = 30)
btn3.grid(row = 5, column = 2, sticky = W+E, ipadx = 20, ipady = 30)
addbtn.grid(row =5, column = 3, sticky = W+E+S, ipadx = 20, ipady = 8)
btn0.grid(row = 6, column = 1, sticky = W+E, ipadx = 20, ipady = 15)
spotbtn.grid(row = 6, column = 0, sticky = W+E, ipadx = 20, ipady = 15)
iqualbtn.grid(row =6, columnspan = 2, column = 2, sticky = W+E, ipadx = 20, ipady = 15)
sqrbtn.grid(row =2, column = 2, sticky = W+E, ipadx = 20, ipady = 8)
blopenbtn.grid(row =2, column = 0, sticky = W+E, ipadx = 20, ipady = 8)
blclosebtn.grid(row =2, column = 1, sticky = W+E, ipadx = 20, ipady = 8)
percetbtn.grid(row =2, column = 3, sticky = W+E, ipadx = 20, ipady = 8)
root.mainloop()
from math import sqrt
def percent():
first_number = entry.get()
f_num.set(float(first_number))
delete_entry()
label_value.set(str(first_number) + " % of ")
singal.set(1)
def type_number(number):
first_number = entry.get()
if ("." in first_number) and (number == "."):
pass
else:
entry.delete(0, END)
current_number = str(first_number) + str(number)
entry.insert(END, current_number)
operation.set("DIG")
def calc_perc():
l_n = float(entry.get())
f_n = f_num.get()
result = (l_n * f_n) / 100
delete_entry()
entry.insert(0, result)
last_label_value = label_value.get()
label_value.set(last_label_value + str(l_n))
def iqual():
if singal.get() == 1:
calc_perc()
singal.set(0)
else:
brute_terms = entry.get()
try:
terms = brute_terms.replace("x", "*")
terms = brute_terms.replace("÷", "/")
except:
pass
try:
result = str(eval(terms))
entry.delete(0, END)
entry.insert(0, result)
label_value.set(brute_terms)
operation.set("IQU")
except:
label_value.set(brute_terms + " ERROR")
operation.set("ERR")
pass
def sqroot():
term = float(entry.get())
result = sqrt(term)
delete_entry()
entry.insert(0, result)
label_value.set("√ of "+str(term))
def delete_entry():
entry.delete(0, END)
operation.set("DEL")
def clean():
entry.delete(0, END)
label_value.set("")
operation.set("CLE")
root = Tk()
root.title("Calculadora")
root['bg'] = "cyan"
f_num = DoubleVar()
l_num = DoubleVar()
operation = StringVar()
label_value = StringVar()
singal = IntVar()
singal.set(0)
# declaring widgets
label = Label(root, textvariable = label_value, bg = "cyan", font = ("anonymous", 10))
entry = Entry(root, font = ('Arial', 16), bg = "cyan")
sqrbtn = Button(root, text= "√",relief = FLAT, bg = "lightgreen", command = sqroot)
blopenbtn = Button(root, text= "(",relief = FLAT, bg = "light coral", command = lambda: type_number("("))
blclosebtn = Button(root, text= ")",relief = FLAT, bg = "light coral", command = lambda: type_number(")"))
percetbtn = Button(root, text= "%",relief = FLAT, bg = "lightgray", command = percent)
delbtn = Button(root, text= "DEL", relief = FLAT, bg = "lightpink", command = delete_entry)
clrbtn = Button(root, text= "CLR", relief = FLAT, bg = "tomato", command = clean)
btn0 = Button(root, text= "0", relief = FLAT, bg = "lightblue", command = lambda: type_number(0))
btn1 = Button(root, text= "1", relief = FLAT, bg = "lightblue", command = lambda: type_number(1))
btn2 = Button(root, text= "2", relief = FLAT, bg = "lightblue", command = lambda: type_number(2))
btn3 = Button(root, text= "3", relief = FLAT, bg = "lightblue", command = lambda: type_number(3))
btn4 = Button(root, text= "4", relief = FLAT, bg = "lightblue", command = lambda: type_number(4))
btn5 = Button(root, text= "5", relief = FLAT, bg = "lightblue", command = lambda: type_number(5))
btn6 = Button(root, text= "6", relief = FLAT, bg = "lightblue", command = lambda: type_number(6))
btn7 = Button(root, text= "7", relief = FLAT, bg = "lightblue", command = lambda: type_number(7))
btn8 = Button(root, text= "8", relief = FLAT, bg = "lightblue", command = lambda: type_number(8))
btn9 = Button(root, text= "9", relief = FLAT, bg = "lightblue", command = lambda: type_number(9))
spotbtn = Button(root, text= ".", relief = FLAT, bg = "lightblue", command = lambda: type_number("."))
devbtn = Button(root, text= "÷", relief = FLAT, bg = "lightgray", command = lambda: type_number("÷"))
multbtn = Button(root, text= "x", relief = FLAT, bg = "lightgray", command = lambda: type_number("x"))
addbtn = Button(root, text= "+", relief = FLAT, bg = "lightgray", command = lambda: type_number("+"))
subbtn = Button(root, text= "-", relief = FLAT, bg = "lightgray", command = lambda: type_number("-"))
iqualbtn = Button(root, text= "=", relief = FLAT, bg = "lightgreen", command = iqual)
# give position for widgets
label.grid(row = 0, column = 0,columnspan = 4, sticky = W)
entry.grid(row = 1, column = 0, columnspan = 4, sticky = W+E, ipady = 30)
btn7.grid(row = 3, column = 0, sticky = W+E, ipadx = 20, ipady = 30)
btn8.grid(row = 3, column = 1, sticky = W+E, ipadx = 20, ipady = 30)
btn9.grid(row =3, column = 2, sticky = W+E, ipadx = 20, ipady = 30)
clrbtn.grid(row =3, column = 3, sticky = W+E+N, ipadx = 20, ipady = 8)
delbtn.grid(row =3, column = 3, sticky = W+E+S, ipadx = 20, ipady = 8)
devbtn.grid(row =4, column = 3, sticky = W+E+N, ipadx = 20, ipady = 8)
btn4.grid(row = 4, column = 0, sticky = W+E, ipadx = 20, ipady = 30)
btn5.grid(row = 4, column = 1, sticky = W+E, ipadx = 20, ipady = 30)
btn6.grid(row =4, column = 2, sticky = W+E, ipadx = 20, ipady = 30)
multbtn.grid(row =4, column = 3, sticky = W+E+S, ipadx = 20, ipady = 8)
subbtn.grid(row =5, column = 3, sticky = W+E+N, ipadx = 20, ipady = 8)
btn1.grid(row = 5, column = 0, sticky = W+E, ipadx = 20, ipady = 30)
btn2.grid(row = 5, column = 1, sticky = W+E, ipadx = 20, ipady = 30)
btn3.grid(row = 5, column = 2, sticky = W+E, ipadx = 20, ipady = 30)
addbtn.grid(row =5, column = 3, sticky = W+E+S, ipadx = 20, ipady = 8)
btn0.grid(row = 6, column = 1, sticky = W+E, ipadx = 20, ipady = 15)
spotbtn.grid(row = 6, column = 0, sticky = W+E, ipadx = 20, ipady = 15)
iqualbtn.grid(row =6, columnspan = 2, column = 2, sticky = W+E, ipadx = 20, ipady = 15)
sqrbtn.grid(row =2, column = 2, sticky = W+E, ipadx = 20, ipady = 8)
blopenbtn.grid(row =2, column = 0, sticky = W+E, ipadx = 20, ipady = 8)
blclosebtn.grid(row =2, column = 1, sticky = W+E, ipadx = 20, ipady = 8)
percetbtn.grid(row =2, column = 3, sticky = W+E, ipadx = 20, ipady = 8)
root.mainloop()
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| Calculadora feita em python, usando tkinter |
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