Using multiple "or" with "and" statements

Question

def check_over(mark):

    ######################################
    #This checks for a win################
    ######################################
    if board[1] == mark and board[2] == mark and board[3] == mark
    or board[4] == mark and board[5] == mark and board[6] == mark
    or board[7] == mark and board[8] == mark and board[9] == mark
    or board[1] == mark and board[4] == mark and board[7] == mark
    or board[2] == mark and board[5] == mark and board[8] == mark
    or board[3] == mark and board[6] == mark and board[9] == mark
    or board[1] == mark and board[5] == mark and board[9] == mark
    or board[3] == mark and board[5] == mark and board[7] == mark:
        print(f'{mark} won!')

This code yields the following error when I try to call it:

    if board[1] == mark and board[2] == mark and board[3] == mark
       ^
    SyntaxError: invalid syntax

This function is meant to check for a win in a tic-tac-toe game based on a python list named board.

Where is the problem?

Answer 1

You can not have have new lines in the middle of your line in python. Try the following:

if board[1] == mark and board[2] == mark and board[3] == mark  or board[4] == mark and board[5] == mark and board[6] == mark or board[7] == mark and board[8] == mark and board[9] == mark or board[1] == mark and board[4] == mark and board[7] == mark or board[2] == mark and board[5] == mark and board[8] == mark or board[3] == mark and board[6] == mark and board[9] == mark or board[1] == mark and board[5] == mark and board[9] == mark or board[3] == mark and board[5] == mark and board[7] == mark:
    print(f'{mark} won!')

Answer 2

Your SyntaxError is occuring because you're not using \ characters to break across multiple lines

def check_over(mark):
    ######################################
    #This checks for a win################
    ######################################
    if board[1] == mark and board[2] == mark and board[3] == mark \
    or board[4] == mark and board[5] == mark and board[6] == mark \
    or board[7] == mark and board[8] == mark and board[9] == mark \
    or board[1] == mark and board[4] == mark and board[7] == mark \ 
    or board[2] == mark and board[5] == mark and board[8] == mark \
    or board[3] == mark and board[6] == mark and board[9] == mark \
    or board[1] == mark and board[5] == mark and board[9] == mark \
    or board[3] == mark and board[5] == mark and board[7] == mark:
        print(f'{mark} won!')