not getting the float answer

Question

from tkinter import *
from datetime import datetime
import pickle
import os

##database will be with these mulas = dict{"name":["value","rate","left"]}

def _price_inputs():

    filename = "datas.pk"

    rupen = Tk()
    rupen.title("Montessori Management System")
    rupen.geometry("1600x800")
    rupen.configure(bg="black")

    framex = Frame(rupen, width=1600, bg="RoyalBlue4", height=100, relief=GROOVE).pack(side=TOP)

    # ==++++===========================title=============================

    #this is the variable for incoming
    names = StringVar()
    rates = IntVar()
    totals = IntVar()


    llb1 = Label(framex, font=("arial", 20, "italic"), bg="black", fg="green", text="STOCK MANAGEMENT",
                 relief=GROOVE).pack(side=TOP)

    now = datetime.now()
    hour = str(now.hour)
    d = str("\\")
    minute = str(now.minute)
    second = str(now.second)
    year = str(now.year)
    month = str(now.month)
    day = str(now.day)

    time =  "\t\t"+year + d + month + d + day + "\n\t\t" + hour + ":" + minute + ":"+second+"\n\n"
    showing = str("#") * 100 + "\n"

    def add_on():

        name = names.get()
        rate = float(rates.get())
        total = float(totals.get())
        with open(filename, "rb") as f:
            dic = pickle.load(f)

        dic[name] = [rate,total]

        with open(filename, "wb") as f:
            pickle.dump(dic, f)

        names.set("")
        rates.set("")
        totals.set("")
        """with open(filename, "rb") as f:
            dic = pickle.load(f)
            lbl.insert(END, "\n")
            lbl.insert(END, dic)
        print(dic)"""
        #_price_inputs()
        #add_fun()
        rupen.destroy()
        _price_inputs()

    def _sold():
        nam = names.get()
        rat = rates.get()
        total = totals.get()
        total = float(total)

        with open(filename, "rb") as f:
            dic = pickle.load(f)

        sold = dic[nam][1]
        dic[nam][1] = sold - rat
        with open(filename, "wb") as f:
            pickle.dump(dic, f)

        names.set("")
        rates.set("")
        totals.set("")
        rupen.destroy()
        _price_inputs()


    def quit():
        # show = "asjdfaskldjflsajdlfj"
        lbl.delete(0.0, END)
        rupen.destroy()
        # lbl.insert(END,"asjdfaskldjflsajdlfj")

    '''
            rate = str(rate)
            total = str(total)
            with open(filename, "rb") as f:
                dic = pickle.load(f)
                if os.path.getsize(filename) >= 1:
                    dic[name] = [rate,total]
                    lbl.insert(END, dic)'''

    lbl = Text(rupen, wrap=WORD, font=("arial", 16, "bold"), height=100, fg="red", width=100)
    lbl.pack(side=RIGHT)


    # show = "asjdfaskldjflsajdlfj"
    with open(filename, "rb") as f:
        ano = pickle.load(f)
    lbl.insert(END, time)

    for k, v in ano.items():
            lbl.insert(END, "\n")
            lbl.insert(END, k)
            lbl.insert(END, "--> ")
            lbl.insert(END, "\t")
            lbl.insert(END, v[0])
            lbl.insert(END, "\t")
            lbl.insert(END, v[1])
            lbl.insert(END, "\n")
    '''for k, v in dic.items():
        show = """{} -->   rate:- {}    Total:- {}  
                """.format(k,v[0],v[1])
    lbl.insert(END, show)
'''

    ####################ENTRY############################
    ent1 = Entry(rupen,font=("arial",16,"bold"),textvariable=names,bd=5,bg="black",fg="white")
    ent1.pack(side=BOTTOM)
    ent2 = Entry(rupen,font=("airal",16,"bold"),bd=5,bg="black",textvariable=rates,fg="white")
    ent2.pack(side=BOTTOM)
    ent3 = Entry(rupen,font=("arial",16,"bold"),bd=5,bg="black",textvariable=totals,fg="white")
    ent3.pack(side=BOTTOM)

####################BUTTONS#########################
    btn0 = Button(rupen,font=("arial",16,"bold"),bd=5,bg="black",text="sold",fg="white",command=_sold)
    btn0.pack(side=BOTTOM)
    btn = Button(rupen, font=("arial", 16, "bold"), bd=5, bg="black", fg="white", text="quit", command=quit,
                 relief=RAISED)
    btn.pack(side=BOTTOM)
    btn2 = Button(rupen, font=("arial", 16, "bold"), bd=5, bg="black", fg="white", text="Add", relief=RAISED,
                  command=add_on)
    btn2.pack(side=BOTTOM)

    def rupen_():
        rupen.destroy()



    #with open("filename.pk", "wb") as f:
        #pickle.dump(f, data)
     #   pass
    rupen.mainloop()

if __name__ == "__main__":
    _price_inputs()

I have this tkinter code where i can add the items with the item name rate and Total. I am not getting the float answer while clicking add or sold button.

Suppose i want to add the item1 with 12.3 rate and Total 10.5 and after i click the add button it only adds 12.0 and 10.0 the value after the . is lost.

You've posted a lot of irrelevant code. Please reduce this down to a [mcve] — Bryan Oakley, Mar 23 '18 at 12:19

Nae · Answer 1 · 2018-03-23T09:36:36.940

0

You can't upcast an integer to a float and not expect to lose data.

rate = float(rates.get())
total = float(totals.get())

The code piece above doesn't get the float values entered back. Because you downcast float values to integers first, losing the data after .. Instead, use DoubleVar as opposed to IntVar from the very beginning:

rates = DoubleVar()
totals = DoubleVar()

edited Mar 23 '18 at 09:36

answered Mar 23 '18 at 09:30

Nae

14,209
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Thank you for the solution but its not working as it should have .....I am getting calculation mistakes due to the float – HEalik Tamu Mar 23 '18 at 09:44

score 0 · Answer 2 · answered Mar 26 '18 at 21:19

0

You can get that by using string formatting. This "%.2f" means two decimal places after the value.

Replace this

dic[name] = [rate, total]

with this

dic[name] = ["%.2f"%rate, "%.2f"%total]

all you can add all variable for the float with the string formatting

"%.2f"

This small example to demonstrate to you how to use string formatting when use convert an Integer to float want to get two decimal places

from tkinter import *


def sum():
    two_decimal = float(e1.get())- float(e2.get())
    print(two_decimal) # this will print with only one decimal place
    print("%.2f"%two_decimal) # this will print with only two decimal places


root = Tk()

e1 = Entry(root)
e1.insert(0, 400)
e1.pack()

e2 = Entry(root)
e2.insert(0, 200)
e2.pack()

b = Button(root, text="Want to get float value", command=sum)
b.pack()

root.mainloop()

answered Mar 26 '18 at 21:19

AD WAN

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oh to show only two numbers after the decimal i can use the round function – HEalik Tamu Mar 27 '18 at 06:41
what i did will not make the value after the integers lost, have tried to do changes i suggested – AD WAN Mar 27 '18 at 08:54
and can u plz tell me how could i show notification to the user after 2 days.......even when the program could be closed between days ... – HEalik Tamu Mar 28 '18 at 04:19
Open a new question – AD WAN Mar 28 '18 at 07:09
i am limited bro plz help me – HEalik Tamu Mar 28 '18 at 09:10
means stackoverflow pending – HEalik Tamu Mar 28 '18 at 09:10
limited as in what try post question with what you have i don't know the code you have now. – AD WAN Mar 28 '18 at 09:47
I can only be able to post the questions after somedays ........so bro plz help me – HEalik Tamu Mar 28 '18 at 16:43
i just want to show a notification after two days......even when the program may be closed in between time.....plz i need help – HEalik Tamu Mar 28 '18 at 16:45

not getting the float answer

2 Answers2