Question

Here is my code for minesweeper in python and it has something wrong. Could you please help me to fix it?

->93 ms-Minesweeper() ipython-input-10-5363c27af02c> ininit (self) self.main.title("mine sweeper") self.define widgets () self.mines random . Sample ( [(ǐ,j) for i in range (25) for j in range (50) j, self. CustomizeNumberOfMine 8 10 print(self.mines) self.main.mainloop() /anaconda3/lib/python3.6/random.py in sample(self, population, k) 315 316 -317 randbelowself. randbelow n - len (population) if not 0<-k <n: 318 319 raise ValueError( "Sample larger than population or is negative" resultNone] * k TypeError: < not supported between instances of 'int' and 'NoneType

import tkinter as tk
import random

class Minesweeper:
def __init__(self):
self.main = tk.Tk()
self.main.title("mine sweeper")
self.define_widgets()
self.mines = random.sample( [(i,j) for i in range(25) for j in range(50) ],self.CustomizeNumberOfMines())
print(self.mines)
self.main.mainloop()
self.CustomizeNumberOfMines()

def define_widgets(self):
""" Define a canvas object, populate it with squares and
possible texts """
self.canvas = tk.Canvas(self.main, width = 1002, height=502,
bg="#f0f0f0")
self.canvas.grid(row=0, column=0)
self.boxes = [ [ ] for _ in range(25) ]
self.texts = [ [ ] for _ in range(50) ]
for i in range(25):
for j in range(50):
box = self.canvas.create_rectangle(3+j*20, 3+i*20, 20+j*20,
20+i*20)
self.boxes[i].append(box)
text = self.canvas.create_text(
11+j*20, 11+i*20, text="?",
width = 8)
self.texts[i].append(text)
# self.canvas.itemconfig(self.boxes[3][7], fill = "blue")
# self.canvas.delete(self.texts[3][5])
# self.canvas.itemconfig(self.texts[2][2], text="9", fill = "red")
self.canvas.bind('<Button-1>', self.handler)

def handler(self, event):
row = (event.y-2)//20
column = (event.x-2)//20
if (row, column) in self.mines:
self.canvas.create_text(100, 100, text="Boom",
font= ("Helvetica", 40))
self.canvas.delete(self.boxes[row][column])
self.canvas.itemconfig(self.texts[row][column], text=
str(self.nr_mines(row, column)), fill = "red")
  

def neighboring(ii, jj):
""" returns a list of all neighboring cells"""
maxrow, maxcol = 25, 50
return [ (i,j) for i in range(ii-1, ii+2) for j in range(jj-1, jj+2) if
i>=0 and i<maxrow and j>=0 and j<maxcol and not (i==ii and j==jj) ]

def nr_mines(self, row, column):
count = 0
for field in Minesweeper.neighboring(row, column):
if field in self.mines:
count+=1
if (row, column) in self.mines:
count+=1
return count
  
def CustomizeNumberOfMines(self):
while True:
numberOfMinesString = input("Enter number of mines: ")
try:
self.numberOfMines = int(numberOfMinesString)
if self.numberOfMines < 1:
print("Too few mines!")
else:
break
except:
self.InvalidResponseMessage()
  
def AskIfPlayAgain(self):
while True:
playAgain = (input("Do you want to play again? y/n ")).lower()
if playAgain == "y":
break
elif playAgain == "n":
self.ShutDown()
else:
self.InvalidResponseMessage()
  
def ShutDown(self):
print("Good bye!")
exit()
  
def rClick(self, event):
self.button.config(bg="#FFCC00", text="?")
  
  

ms = Minesweeper()

Answer 1

As you have not provided the intended code so there was difficulty to run whole program.

But I am able to remove your error. The problem is in

self.mines = random.sample( [(i,j) for i in range(25) for j in range(50) ],self.CustomizeNumberOfMines())

Now here you are calling a function but not returning any value to it takes null value and throws the error you are getting.

I updated the code for the function. Check below :

def CustomizeNumberOfMines(self):
while True:
numberOfMinesString = input("Enter number of mines: ")
try:
self.numberOfMines = int(numberOfMinesString)
if self.numberOfMines < 1:
print("Too few mines!")
else:
return int(numberOfMinesString)
except:
self.InvalidResponseMessage()
#here return default value

Please uprate.

Output :

mine sweeper