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我无法弄清楚是什么导致我的代码在执行结束时打印“无”。该代码应该读取一个包含零和一个矩阵的txt文件，并打印由数字1形成的正交“岛”的合并。Python代码打印不需要的行
from itertools import groupby
from operator import itemgetter
def matrixReader(inputFile): # Reads the file and creates the matrix map.
w, h = map(int, inputFile.readline().strip().split())
matrix = [list(map(int, line.strip())) for line in inputFile]
return matrix, h, w
def matrixAdvancedSweeper(matrix, h, w): # Swipes the matrix map after NEW land chunks and makes a tuple for each piece of land.
islandCount = 1
landCoordinates = []
for y in range(h):
for x in range(w):
if matrix[y][x] == 1:
islandCount += 1
islandSorter(matrix, y, x, islandCount)
if matrix[y][x] > 1:
landCoordinates.append((matrix[y][x]-1, y, x)) # Creates a list of tuples with the number of the island, height position and width position.
return sorted(landCoordinates, key=itemgetter(0, 1)) # Sorts the list of tuples (first) by number of the island and (second) by height position.
def islandSorter(m, h, w, c): # Recursive function to enumerate and hide any land attached to a chunk already swiped.
if m[h][w] == 1:
m[h][w] = c
if w < len(m[0]) - 1: islandSorter(m, h, w + 1, c)
if h < len(m) - 1: islandSorter(m, h + 1, w, c)
if w > 0: islandSorter(m, h, w - 1, c)
if h > 0: islandSorter(m, h - 1, w, c)
def coordinatePrinter(sortedCoordinates): # Prints the groups of coordinates that forms each island.
for key, group in groupby(sortedCoordinates, lambda x: x[0]): # Creates groups using the first item of the tuples as key and traverses those returning each key and group.
print('____________\n Island %s\nCoordinates:' % (key))
for tile in group:
print(' x %s y %s' % (tile[1], tile[2]))
with open('TestFile.txt') as inputFile: # Opens the defined file to execute the nested code and than closes it.
print(coordinatePrinter(matrixAdvancedSweeper(*matrixReader(inputFile))))
下面是它应该读取文件（TESTFILE.TXT）的用于测试目的的为例：
4 4
1110
0000
0000
0110