Convertir un fichier dans une matrice, de remplacer chaque caractère par un certain nombre en Python - Stack Overflow

Following instructions to solve a maze problem, I need to read from a file and then convert it into a matrix. Once this is done I need to replace every "#" (represents a wall) with -1, every " " (representing a corridor) with 0 and every "M" (represents a minotaur) with -2. I've managed to convert the file into a matrix but the latter half concerning the replace I am running into problems.

I am a beginner and have only been learning python for a couple months now(hence why my following code is probably painful to read). Thanks so much for any help!

The file being read contains the following:

###########
      # # #
# ### # # #
# #   # # #
# ##### # #
#       # #
# ####### #
# #       #
# ####### #
#          
###########

Here is my code:

def loadmaze(filename):
    f = open(filename)
    lines = f.readlines()
    COR = "0"
    WALL = "-1"
    MINO = "2"
    new_maze = []
    for i in range(len(lines)):
        lines[i] = "*" + lines[i]
        lines[i] = lines[i].strip("*").strip("\n")
        new_maze.append(lines[i])
    x = new_maze
    con_maze = []
    for i in range(len(x)):
        z = list(x[i])
        con_maze.append(z)
    for i in range(len(con_maze)):
        for j in range(len(con_maze[i])):
            con_maze[i][j].replace("'#'", COR)
            con_maze[i][j].replace(" ", WALL)
            con_maze[i][j].replace("M", MINO)

    return con_maze

print loadmaze("maze.txt")

import re
from pprint import pprint

def loadmaze(filename):

    maze = []

    with open(filename) as f:
        for line in f:
            with_delimiters = ''
            for i,ch in enumerate(line):
                with_delimiters += 'S' + ch
            line = with_delimiters

            inchars = '# M'
            outchars = ['-1','0','-2']
            for i,ch in enumerate(inchars):
                line = line.replace(ch,outchars[i])
                line = line.replace('\n','')

            maze_col = line.split('S')
            for i in maze_col:  
                if i == '':
                    maze_col.remove(i)
            maze.append(map(int,maze_col))

    return maze


pprint (loadmaze('maze.txt'))

output:

[[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1],
 [0, 0, 0, 0, 0, 0, -1, 0, -1, 0, -1],
 [-1, 0, -1, -1, -1, 0, -1, 0, -1, 0, -1],
 [-1, 0, -1, 0, 0, 0, -1, 0, -1, 0, -1],
 [-1, 0, -1, -1, -1, -1, -1, 0, -1, 0, -1],
 [-1, 0, 0, 0, 0, 0, 0, 0, -1, 0, -1],
 [-1, 0, -1, -1, -1, -1, -1, -1, -1, 0, -1],
 [-1, 0, -1, 0, 0, 0, 0, 0, 0, 0, -1],
 [-1, 0, -1, -1, -1, -1, -1, -1, -1, 0, -1],
 [-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
 [-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1]]

Following instructions to solve a maze problem, I need to read from a file and then convert it into a matrix. Once this is done I need to replace every "#" (represents a wall) with -1, every " " (representing a corridor) with 0 and every "M" (represents a minotaur) with -2. I've managed to convert the file into a matrix but the latter half concerning the replace I am running into problems.

I am a beginner and have only been learning python for a couple months now(hence why my following code is probably painful to read). Thanks so much for any help!

The file being read contains the following:

###########
      # # #
# ### # # #
# #   # # #
# ##### # #
#       # #
# ####### #
# #       #
# ####### #
#          
###########

Here is my code:

def loadmaze(filename):
    f = open(filename)
    lines = f.readlines()
    COR = "0"
    WALL = "-1"
    MINO = "2"
    new_maze = []
    for i in range(len(lines)):
        lines[i] = "*" + lines[i]
        lines[i] = lines[i].strip("*").strip("\n")
        new_maze.append(lines[i])
    x = new_maze
    con_maze = []
    for i in range(len(x)):
        z = list(x[i])
        con_maze.append(z)
    for i in range(len(con_maze)):
        for j in range(len(con_maze[i])):
            con_maze[i][j].replace("'#'", COR)
            con_maze[i][j].replace(" ", WALL)
            con_maze[i][j].replace("M", MINO)

    return con_maze

print loadmaze("maze.txt")

import re
from pprint import pprint

def loadmaze(filename):

    maze = []

    with open(filename) as f:
        for line in f:
            with_delimiters = ''
            for i,ch in enumerate(line):
                with_delimiters += 'S' + ch
            line = with_delimiters

            inchars = '# M'
            outchars = ['-1','0','-2']
            for i,ch in enumerate(inchars):
                line = line.replace(ch,outchars[i])
                line = line.replace('\n','')

            maze_col = line.split('S')
            for i in maze_col:  
                if i == '':
                    maze_col.remove(i)
            maze.append(map(int,maze_col))

    return maze


pprint (loadmaze('maze.txt'))

output:

[[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1],
 [0, 0, 0, 0, 0, 0, -1, 0, -1, 0, -1],
 [-1, 0, -1, -1, -1, 0, -1, 0, -1, 0, -1],
 [-1, 0, -1, 0, 0, 0, -1, 0, -1, 0, -1],
 [-1, 0, -1, -1, -1, -1, -1, 0, -1, 0, -1],
 [-1, 0, 0, 0, 0, 0, 0, 0, -1, 0, -1],
 [-1, 0, -1, -1, -1, -1, -1, -1, -1, 0, -1],
 [-1, 0, -1, 0, 0, 0, 0, 0, 0, 0, -1],
 [-1, 0, -1, -1, -1, -1, -1, -1, -1, 0, -1],
 [-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
 [-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1]]

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