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import sys
from struct import unpack
def mapprint(filename):
file = open(filename, 'rb')
contents = file.read()
file.close()
width, height = unpack('>HH', contents[0:4])
for y in range(height):
for x in range(width):
nibble = x + y * width
byte = int(nibble / 2)
shift = byte * 2 - nibble + 1
num = (contents[4 + byte] & (0xf << 4 * shift)) >> 4 * shift
print(" ─│┘──└┴│┐│┤┌┬├┼"[num], end='')
print("\n", end='')
if __name__ == "__main__":
if len(sys.argv) > 1:
mapprint(sys.argv[1])
else:
exit(1)
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