please help

[Reshmi Nath]

hi 

i am really new to python and Tkinter.I was writting this game where you have a screen with 100 buttons(its the screen class).Its a 2 player game so the buttons should display the 2 different symbols alternately,and also when abutton is clicked the appropriate position in an array in the board class should change to 1 or 2.So that i can write a function that would check if there is a winner (which is when we have 5 in a row).I wrote a program which i thought would worklike that but its giving me errors .I am attaching a copy of the program here.please help I am really desparate.I also want to know what exactly does the mainloop do?

Thanks Reshmi.

from Tkinter import*

class Board:
    def __init__(self):
            self.mat = [[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0]]
            self.tok1 = 10
            self.tok2 = 10
    def printIt(self):
            print self.mat


class but:
   def __init__(self,master,row,col):
        self.button=Button(master,text = '   ',command=self.clicked(row,col))
 self.index = 0                  
 self.b = Board() 
 
   def clicked(self,row,col):
        self.index = self.index+1   
 print self.index
 if self.b.tok1 > 0 and self.b.tok2 > 0:         # each time a button is clicked alternate 
  if self.index%2 == 0:                   # signs should display
                        self.button.configure(text = '#')
   self.b.tok1 = self.b.tok1-1
   b.mat[row][col]=1               # when the button is clicked appropriate position
  elif self.index%2 != 0:                 # in b.mat should change to 1 or 2
                        self.button.configure(text = '&')
   self.b.tok2 = self.b.tok2-1
                        b.mat[row][col]= 2

   def unClicked(self):
        self.button.configure(text ='   ')

   def allign(self,i,j):
        self.button.grid(row=i,column=j)

def game():
        root = Tk()
        app = Screen(root)
 root.mainloop()
 
# output the board with 100 buttons
class Screen:
    def __init__(self,master):
        frame = Frame(master)
        frame.pack()
        self.index = 0

        self.list = [None]*100
        self.index=0
    
        for i in range(10):
                for j in range(10):
                        self.temp=but(frame,i,j)
                        self.temp.allign(i,j)
                        self.list[self.index]=self.temp
                        self.index = self.index+1
                        

if __name__== '__main__':
 game()





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