from tkinter import * #imports
from tkinter import Tk
from tkinter.filedialog import askopenfilename

win = Tk()            #create instance

win.title("Spatialization of DSSAT model")

w = 160 # width for the Tk root
h = 100 # height for the Tk root

# get screen width and height
ws = win.winfo_screenwidth() # width of the screen
hs = win.winfo_screenheight() # height of the screen

# calculate x and y coordinates for the Tk root window
x = (ws/2) - (w/2)
y = (hs/2) - (h/2)

# set the dimensions of the screen
# and where it is placed
win.geometry('%dx%d+%d+%d' % (w, h, x, y))

def var_states():
    print("soil: %d, nweather:%d" % (var1.get(), var2.get()))

Label(win, text="Select:").grid(row=0, sticky=W)
var1 = IntVar()
Checkbutton(win, text = "soil", variable=var1).grid(row=1, sticky=W)
var2 = IntVar()
Checkbutton(win, text = "weather", variable=var2).grid(row=2, sticky=W)

MyButton1 = Button(win, text="Submit", width=10)
MyButton1.grid(row=10, column=10)

Tk().withdraw()
filename1 = askopenfilename()
print(filename1)

Tk().withdraw()
filename2 = askopenfilename()
print(filename2)

win.mainloop()           #start the GUI