I am trying to build a game board as part of my Computer Science A-level NEA, I don't know what I am doing wrong can someone please help and fix my code?
space = []
def create_board():
for i in range (1, 8):
for j in range (1, 8):
space[i][j] = " "
j = j + 1
i = i + 1
create_board()Error given:
line 6, in create_board
space[i][j] = " "
IndexError: list index out of range
I generally do this with append:
def create_board(rows, columns):
board = []
for row in range(rows):
board.append([])
for column in range(columns):
board[-1].append(' ')
return board
If it's real simple, like your case, you can do a list comprehension:
board = [[' '] * columns for row in range(rows)]
Here are some comments on why your code doesn´t work.
space = [] # You are creating a variable of type list and want to modify this list in a function, BAD IDEA!
def create_board():
for i in range (1, 8): # useless blank space between function name and brackets, range(1,8) returns values 1,2,3,4,5,6,7. Is that your intention?
for j in range (1, 8):
space[i][j] = " " # at first start you have an empty list that cannot be accessed with indices like this, there isn´t even a space[0]
j = j + 1 # what should that be good for? Increasing the loop counter outside the loop?
# the for-loops are already counting from 1 to 7, j is 7 after the loop and you set it to 8 ???
# even increasing inside the loop is useless
i = i + 1 # see above
create_board() # a function that creates something but doesn´t return it is useless.Your code refactored in a way it works but not being pythonic.
def create_board(height, width):
matrix = []
for y in range(height):
column = []
for x in range(width):
column.append(" ")
matrix.append(column)
return matrix
space = create_board(8,8)